b)To cushion or dampen pressure surges. Technician B says that. The element of the planetary gear set that is connected to the transmission output shaft. 22935 Elkana Deane Lane Katy, TX 77449. reduced. Technician A says that a sprag and a roller are two types of one - way clutches. Vibratory Rollers. 8. The two common industrial radial-roller clutch styles are called a sprag and a ramped roller. Study with Quizlet and memorize flashcards containing terms like Two technicians are discussing one-way clutches. Part Number: BDD-1060603. In this type of freewheel, the two races are cylindrical. B-when a one-way clutch is used for a reaction member, the clutch self-applies when the throttle is open a. Upon reversal, the cams quickly release (and then tolerate high overrunning speeds). 3 Structure of KX Series One-way Clutch 2 End bearing Cage Spring Overrunning Input InputAlways grease lubricated. As a result, it is installed in descending order (upside down). The strongest of the band designs is the. Technician B says that one purpose of a multi-disc clutch is to hold one rotating member to another rotating member. Suitable for low to mid-speed and middle load applications. Built-In Freewheels can either be roller or sprag type freewheels that are predominantly non-bearing supported. 7. Allows for a compact design. ) ÙService life Even when torque is applied at the torque capacity in NTN one-way clutch units and the units are engaged over one million times, weNew One Way Roller Clutch Sprag Bearing Assembly **Please verify your transmission before ordering. As we all learned in Auto Trans 101, a two-way freewheeling sprag will result in a vehicle with poor acceleration but satisfactory cruise speed; a sprag clutch seized on its one-way clutch, on the other hand, allows satisfactory early. , Ltd. Description. The ML Series has a cam and roller structure, and various transmission parts can be easily mounted. See Figures 1 and 2. , Which of the following was used in early automatic transmissions? and more. Usually, a crank mechanism applies the reciprocating motion to the clutch. This improves its efficiency and torque multiplication. Rotational speed: 350 rpm - 3,600 rpm. 1 to 2 mm in length and 30 ˃ in anglemust be made at the ends of the raceway of the inner andouter rings to facilitate assembly of the one-way clutch (Fig. Picture going to an event such as a concert, fair, basketball or football game, where you pass through a turngate,. 4. What gear are you in when the rear clutch, overrunning clutch, overdrive overrunning clutch, and direct clutches are engaged in a 44RE transmission? First Gear. When the solenoid is off, the overrun clutch is on. One - way Roller Clutch The roller clutch has a hub. Ships from and sold by Off Brand Parts Direct. The configuration of the support and the mounting of the spragclutch is basically the same as that of a ramp roller clutch. ters, vehicle, and rotorcraft. with internal bearings full-face indexing. The RIZ has an inner race designed for freewheeling. Lots of guys call any one way clutch a sprag. Borg Warner's product range covers cam, roller, and sprag one-way clutches and systems. A sprag clutch goes by many names: One-way bearing, freewheel clutch, cam clutch, overrunning clutch. This kit contains 16 steel steel springs and rollers (elements) and a bimetal bronze washer. Sprag one-way clutches freewheel in one direction, but transmit torque in the opposite direction when the sprags rotate into position and become wedged between the inner and outer races (Vernay et. Cao, “Design and analysis of logarithmic spiral type sprag one-way clutch,” Journal of Central South University, vol. The normal contact stiffness of the sprag one-way clutch is calculated by Newton iterative method. When a multiple-disc clutch is used as a holding member, the lugs of the unlined plates are splined into, When a sprag clutch locks, the sprags and more. These bearings are good for large orders and low to high torque needs (1 to 2673 Nm). b. Torque: 43. A torque converter is being discussed. Technician B says it. In reality, all of these sprags are not much of an. 5. Roto and 315 Controlled coupling HydraMatic's ( Olds-Jetaway, Pontiac- Strato Flight or Super Hydramatic, Cadillac P315 Hydramatic ), both use a combination of a conventional clutch and Sprag Clutches ( or one way clutch ). If the stator's one-way clutch spins freely at low speeds, there will be a loss of torque multiplication, resulting in poor low-speed performance. Both operate in a way that they rely on wedging metal between two races. A one-way sprag clutch prevents rotation from moving freely in both rotational directions. one-way roller clutch ML series. 8ARQ. One Way Sprag Overrunning Clutch Roller Bearings Backstop DC7221b 15c 5c for Sower/Seeder/Planter, Find Details about One Way Bearing, Overrunning One Way Bearing from One Way Sprag Overrunning Clutch Roller Bearings Backstop DC7221b 15c 5c for Sower/Seeder/Planter - Shandong Guomai Bearing Co. Pipe Rollers - One-Way Clutch, with Bearings, Core Only. Sprag Roller Clutch, Fits TH700-R4 4L60E 4L60 4L70E TH-700, Low/Reverse, 1987-Up. The sprag has proven to be one of the stronger points of the compounder assembly. The influence of the structure parameters. P and CSK. FREEWHEEL (ONE WAY) CLUTCHES - SPRAG TYPE An ISO 9001 : 2015 Certified Group NMTG NMTG Mechtrans Techniques Private Limited A2, GIDC Naroda, Phase -1, Nr. Like any sprag, it needs to be installed correctly. Technician A says a dog clutch utilizes roller bearings held in place by springs to separate the inner and outer race of theclutch assembly. This means that roller ramp clutches typically must be provided with inner and outer rings to incorporate the ramps, while sprag clutches can operate directly. Technician B says one-way overrunning clutches can be either roller type or sprag type. Min. 43. 10. The Sprag-Type One-Way Clutch is used on a wide range of applications e. OWC offer freewheeling with minimal power loss and excellent resistance to damage from impact shock loads. The sprags have a greater diagonal dimension across one set ofProduct Description. Buy Spring & Roller Clutch Sprag Kit, Low/Overrun, fits C4 & C5 1964-1986. That is to say, if there is partial miss-engagement in rollers, some of rollers engaged causes eccentricity between inner and outer races, with the. This CSK8PP one-way ball bearing with sprag freewheel backstop clutch is made of chrome steel, is double shielded, and has a steel cage. Study with Quizlet and memorize flashcards containing terms like The torque-carrying capacity of a clutch is determined by:, When a multiple-disc clutch is used as a holding member, the lugs of the unlined plates are splined into, When a sprag clutch locks, the sprags and more. Which of the following dimensions is regarded as being correct for clutch brake squeeze at the clutch pedal? - 1 inch. 23) Two technicians are discussing one -way clutches. The sprag design is comprised of a full complement of accurately formed sprags filling the annular space. Notice the ramps on the inner race of the direct drum, these ramps, "cam" the rollers of the element outward to lock into the smooth surface of the outer race. The type of one-way clutch that uses rollers is called a sprag. I cut the rear ring gear no issues so far. All available thru A&A or Cope. One-way roller clutches and one-way sprag clutches are the two forms of one-way clutches. Technician A says one-way clutches prevents components from turning in either direction. The sprag clutch is a type of one-way clutch that prevents the 3rd clutch drum from rotating clockwise faster than the input sun gear. For these reasons, studies on high-performance overrunning clutches have always been the focus of. Rotational speed: 220 rpm - 2,650 rpm. Who is correct? both The dual mass flywheel has which of the following features? absorbs engine vibration Oil on the. 95. Technician B says it normally stops fluid flow in both directions. Pages for logged out editors learn more A sprag clutch is a one-way freewheel clutch. None of the above. Everywhere else - Lo-roller unlockedProduct Description. Bearings - One Way - Sprag - Standard Rec. Rotational speed: 160 rpm - 600 rpm. Technician B says one-way overrunning. Two technicians are discussing one-way clutches. Both A and B D. Ratcheting OWC cannot slip, they either engage and carry torque or they do not. List and describe the types of pumps in an automatic transmission. I normally offer the customer either option, of course the roller is a cheaper option but if it craps, the sprag is the upgrade and the initial savings were not worth it. 967@134 mph 1. Technician B says the pressure-regulator valve usually. A one-way sprag clutch prevents rotation from moving freely in both rotational directions. Usually you find this sprag clutch either in the. . Types CSK. They are bearing supported, delivered grease lubricated and protected against dust of more than 0,3 mm. 6 Nm - 240 Nm. roller bearings, thrust bearings, ceramic and ceramic hybrid bearings, stainless steel bearings, miniature bearings, linear bearings,. Sonnax 74574-HD sprag clutch hub Borg Warner 29 element dual cage forward sprag (already mentioned) 29236AM Reverse input drum: Reuses stock reverse input drum Borg Warner clutches Raybestos "turbulator " steels (needed, or use Transtar steels?) Alto lower wave plate (replaces beveled plate) part number needed. The FR series by Ringspann is is full face one way clutch used for bolting the face in inch dimension with sprags. Hi, I’ve been learning about car mechanics recently and I would like to know how the automatic transmission’s one way clutches work. one-way roller clutch ML series. There are many designs but the common one is a set of balls on ramps. 17. Technician A says a multi-disc clutch is a holding/application device in an automatic transmission. b. Sprag clutch bearing must be installed to ensure the coaxiality of the inner ring. Thick cold oil and old slightly sludgy parts and a cold battery make this much more likely on a cold day. Angular contact ball bearing(70 series. c. Cam clutches are especially rugged. Whatever you call it, sprag clutches are a critical mechanical device. PP are sprag type freewheels integrated into 62. The outer race of the OWC system is fixed rotation-ally. Show details Hide details . New Rear/Low Sprag (1 way Roller Clutch), fits Ford C6/E4OD. Cylindrical roller bearing(NU10 series, NJ2 Series, N3 series, NN series) 6. BD Diesel Heavy-Duty One Way Sprag Clutches 1060603 One Way Sprag Clutch, 68RFE, Dodge, RAM, Each. 25 + times engine speed, usally very bad when there is a cast drum involved. They drive instantly and provide continuous sprag. They are bearing supported, delivered grease lubricated and protected against dust of more than 0,3 mm. c. Question 3. One-Way. Each sprag is essentially a strut placed between the races in such a way that it transmits power from one race to the other by a wedging action when either race is rotated in the driving direction. Tech B says that sprag clutches must be serviced as a. Technician A says a dog clutch utilizes roller bearings held in place by springs to separate the inner and outer race of theclutch assembly. 10 - $0. Above right: Although time consuming, properly setting up the sprag is what keeps a TorqueFlite from disintegrating like ours did. sprag without internal bearings indexing. Bands and roller clutches are holding members. One-way bearings are widely used in washing. A one-way roller clutch or sprag is located inside the stator assembly. PP features a keyway on both the inner and outer race. Both the one-way roller and the sprag operate on the same principle, but sprags have a greater torque-holding capacity. 51 mm - 56. inclined plane (examples) wheelchair ramp, playground slide, sloped road. These bearings are good for large orders and low to high torque needs (1 to 2673 Nm). 1. Torque: 70 Nm - 2,300 Nm. When turned in the opposite direction, it operates as a clutch rather than a bearing. With the stator being held stationary to the stator shaft on the transmission, it holds the entire assembly from turning, redirecting oil back. Sutton Coldfield, UK. Many popular domestic automatics including the GM TH-350 and TH-400, Ford C-4 and C-6, and the Chrysler TF-727 and TF-904 utilize a one-way roller-type clutch. I know how the normal grab clutches work that are splined to the ring gear, and how they are actuated and what they do, but I can’t seem to quite understand just exactly how the one way clutches work. Designed for press fit installation. These parts include: • Low one-way roller clutch • Reverse hub assembly • Inner race assembly • Low/reverse clutch return spring • Reverse ring gear and hub • Reverse planetary assembly • Clutches and steel plates You can interchange these compo-nents as a complete set, but never try toSprag Design This sprag-type design overrunning clutch generally consists of an inner race, an outer race, a set of sprags, a sprag retainer, energizing springs, and bearings . One-Way Clutch: Low Roller (700R4) (4L60) (4L60E) New low roller clutch features extra-wide design, for increased torque capacity. OR with roller ramps. , The apply device that is most commonly used as a driving member is a _____. It is ideal for centrifugal lifting off of sprag type freewheel with the inner race rotating that is for ckstop, or overrunning clutch applications. Different kinds of one-way clutch are distinguished by their torsional medium, such as roller, sprag, and. The global roller position is unaffected by roller dis-placement. $26. Which planetary control is used for holding a planetary gear? One-way clutch, multiple disc clutch, double or single wrapped band and servo. A good example is a production line that moves to one position then stops, waits, and then moves one position over. Not Yet Reviewed. Rotational speed: 2,200 rpm - 10,000 rpm. Tech A B. on-road driving and to prevent excess wind-up torques in the transmission either one-way or. One-way bearings with roller clutch and one-way bearings with sprag clutch are the most common. Technician A says that a sprag and a roller are two types of one-way clutches. I use the good outer races and roller clutch's in all my mild buildups and tame down the 1-2 shift shock to make them live. 0 /5 ·. -clutches transmit the rotary motion of one shaft to another when. The torque is transmitted by rollers that wedge against interior ramps. Types CSK. One way to gain element quantity is through overall diameter, as is the case with the A761E and AB60E F3 sprag assembly (Figure 7). . 981092. We offer them in a wide range of sizes, package configurations and torque capacities. Sprag Clutch - General Specification RENOLD Clutches and Couplings. A band can be used to hold or drive a planetary gearset. Company Introduction: Changzhou Lisongtai Industrial Motion Technology Co. Brand. The outer race has six lobes, and the bearing has a 10 mm inside diameter, a 16 mm outside diameter, and a 10 mm depth. A. . The stator is mounted on a ________. The stator's overrunning clutch enables the stator to spin freely in one direction while keeping it from rotating in the other. B. 4L vehicles (2012 and up), which in this application is called the 6F24. Who is correct?, Technician A says the pressure-regulator valve usually has the responsibility for filling the torque converter. The 68RFE low reverse sprag is commonly known to flip its dog bone sprag struts and fail. Smooth Wheeled Roller. sprag one-way clutch FR series. A transfer case is extremely noisy in all selections except neutral (N) whenever the vehicle is moving. Then fork movement in either direction slides the release bearing along the transmission hub sleeve. When the "diode" was used, it replaced the roller clutch with a sprag that is inherently weaker. The combination of their binary nature and how rapidly they change state Roller clutches and sprag clutches can be designed to be either the centrifugally-engaging type or the centrifugally-disengaging type. Abuse is another reason for sprag failure, either intentional abuse or over working your vehicle can cause a. 1 yrs CN Supplier . Study with Quizlet and memorize flashcards containing terms like Which of the following torque converter components is attached to the engine flywheel? impeller stator turbine input shaft, The transmission for many hybrid vehicles uses _____to drive and hold planetary gearset elements. Currently make do with a 72 tooth ratchet. 26–27) GMN Sprag Type Freewheel Clutches Series: FP Components: Insert element FE 400 Z / FE 400 M + Raceway rings Inner ring press fit Outer ring press fit + Ball bearing + Roller bearing Lubrication: Oil or grease Width: 27 mm. Who is correct? Tech A. Explain the functions of the torque converter. can be replaced with E4OD parts (fig-ure 6). MR Series - Utilises a special sprag cage arrangement to allow high speed overrunning of the outer race. The sprag style of clutch has more holding power for a given size because it has more contact points holding the inner and outer races together. For those who are interested this is the follow up to the other post. This clutch is a freewheeling device with an inner race and an outer race, either of which can be the input or output member. Ships from and sold by High Performance International. 8ARQ. The. Days to Ship : 7 Days. Their operation is similar in that they both rely on wedging the metal sprags between two races. 0L and 2. A pressure plate is the most important component of the entire clutch. Single Row. The excitation signal for our system is either a peri-A sprag functions as a one-way clutch and operates similarly to a ratchet tool from your toolbox. If this sprag is installed backward, a tie-up will occur anytime the direct clutch is applied. Diameter: 25 mm - 110 mm. . In the most demanding of applications, Roller Ramp Clutches gladly step up to the plate. These LLH Holdbacks designed for long life, as the name implies, and they are sealed to protect against airborne contaminants. So the only way to turn its fuction off is to lock the member that is rotating by some other means. AHL Starter Solenoid Relay for 4-Stroke GY6 Engine 50cc 70cc 90cc 100cc 150cc 200cc 250cc ATV Dirt Bikes Scooters. The compressive deflection for the sprag itself can be written as where is the normal contact force on the inner race or outer race. 4th October 2016. Needle-Roller. A band can be used to hold or drive a planetary gearset. Correct interference dimensions must be maintained to obtain maximum bearing and clutch performance. The sprag race assembly functions as the outer sprag race and is splined to the 3rd clutch drum (634). It can freewheel in one direction, but locks up in the other direction. The type of one-way clutch that uses rollers is called a sprag. 5 yrs CN Supplier . double wrap. Tech A B. Allomatic one way clutches are full-hardened, individually loaded, and made with high-quality maraging steel that provide higher fatigue limits than stainless steel. Study with Quizlet and memorize flashcards containing terms like Two technicians are discussing one-way clutches. Technician A says that bursting of clutch friction facings is often caused by coasting a truck with the clutch pedal depressed. Rollers are a sort of construction plant utilized for compacting stuff like soil, gravel, sand, road surfaces, ETC. The combination of their binary nature and how rapidly they change stateRoller clutches and sprag clutches can be designed to be either the centrifugally-engaging type or the centrifugally-disengaging type. Features ・Uses a cam and roller structure where rollers s. Bonbo T-0158 Universal Clutch Drum Spring Compressor Transmission Tool Heavy Duty Steel. Spherical roller bearing 9. That means in the engaged direction, there is no relative rotation allowed between the two components connected by the. When front pullers are not used, the seating tolerance should be K6. holdback device » back stop device. -the clutch is used so that the driven shaft may be started or stopped at will without stopping the driving shaft. The spring mechanism that is built into the parking pawl assembly allows the driver to place the vehicle shift selector into park even when the parking park does not quite align with the notches in the drum. Freewheel bearings are. b. . Part Number: SDM-PCE6981001. Rotation in the other direction disengages the sprags D shape sprag design Free action PCE® design Inner race C/T design Various Sprag DesignsCompany Introduction: Changzhou Lisongtai Industrial Motion Technology Co. Like seemingly all hubs that use a one-way bearing or sprag clutch, the weight of the rear hub is on the heavy side at 475g for the. 5. Neither A or B, Tech A. If , however , the drum in figure 4-26. 1st gear w/ transbrake disengaged - Direct clutches release, sun gear free to rotate anti-clockwise, rear band releases and lo-roller locks. The quick on and off action works perfectly in the harshest environments with extreme torque requirements. As his spins fine and mine is bound up. And in the trans above it is by way of a contracting band. sprag external bearing. c. 73 series. a. The paper explained both the static and dynamic behavior of roller One-Way Clutches (OWC), and described the practical application of esoteric stress equations to the design of roller OWCs. do not use anything that is "STICKY" as this will render your "OWB" useless. In 1997, Chesney and Kremer wrote a paper entitled Generalized Equations for Roller One-Way Clutch Analysis and Design [1]. Technician A says one-way clutches prevents components from turning in either direction. 930911. Terms in this set (64) A car with an automatic transmission creeps forward in neutral. In 1997, Chesney and Kremer wrote a paper entitled Generalized Equations for Roller One-Way Clutch Analysis and Design [ 1 ]. What type of planetary gear set has a set of long and short pinions?A sprag clutch bearing is a one way freewheel clutch that turns in a single direction. Two technicians are discussing automatic transmission clutches. roller: [noun] a revolving cylinder over or on which something is moved or which is used to press, shape, spread, or smooth something. Material selection, geometry, and. Eventually the impeller and turbine achieve approximately the same speed, and then the one-way clutch releases. When it comes to a one-way clutch (OWC), more factors come into play. The inner sprag race is part of the drum. None of the above. Study with Quizlet and memorize flashcards containing terms like Which of the following is most likely to be caused by too cold of a temperature in the transmission fluid?, Two technicians are discussing automatic transmission clutches. Axial loads transfer force in an equal, uniform. They will drive in one direction, and when rotation is reversed, or if the output rotated faster than the input, they will slip or. Bands and roller clutches are holding members. Hi, I’ve been learning about car mechanics recently and I would like to know how the automatic transmission’s one way clutches work. Ratcheting OWC cannot slip, they either engage and carry torque or they do not. 5, L is the roller length), so The radial structure is compact, and its inner diameter and load capacity are the same as those of other types of bearings, and. screw (examples) swivel chair, base of jar lid, lightbulb base. If you are using the term as a verb- "I am. The internal elements are long enough and shaped so that one race can turn in one direction independently. The wedge-raceway contact mechanical model, considering centrifugal force of wedge and the eccentricity of the inner ring and the outer ring of the one-way clutch, is established based on Hertz contact theory. 6. with internal bearings full-face indexing. Description: Hilliard Sprag Clutches are designed for overrunning, backstopping and indexing applications. One Way Bearings are designed to transmit. 4L30E All Years. Technician B says that a one-way clutch could be installed upside down and cause the automatic transmission/transaxle to not function correctly. Technician B says that a one - way clutch could be installed upside down and cause the automatic transmission/transaxle to not function correctly. - 1 1/2 inches. The type of one-way clutch that uses rollers is called a sprag. The roller clutches are available with and without bearing supports. Torque transmission is by press fit with outer housing to K6 tolerance and shaft to h6 or j6. List and describe the types of pumps in an automatic transmission. The sprag locks using roller locking techniques in a manner well known in the case of a three-dimensional (3-D) locking sprag. Technician B says a one-way roller or sprag is a device that typically. Technician A says that a sprag and a roller are two types of one-way clutches. So, the statement of Technician B is also correct. To maintain a strong connection between two discs. W (b): 5 to 18 Speed (RPM): 22,500 to 129,375. Tech B says that the clutch must slip slightly during engagement. This imbalance can occur due to uneven distribution of weight on the tire or a misalignment of the tire and wheel assembly. Sometimes a starter rebuild can help by getting more rpm, and throwing the rollers out harder. A roller type sprag member consisting of three main elements, an outer roller half section, an inner roller half section, and an assembly-location pin. 981092. Compatible with medium loads and easy to install. 41. The sprag clutches don’t need any external control. Whether as a standard one-way bearing, a one-way stepper feed, overrunning clutch, or overrunning freewheel, one-way bearings are versatile, both in functionality and usage. Precision bearing manufacturer Schaeffler has seen an increase in demand for its one-way roller clutches, including applications on e-bikes (electric bikes) and motorcycles, as well as industrial applications in overrunning clutches for packaging machines and speed compensation devices for. One-way clutches offer freewheeling with minimal power loss and excellent resistance to damage from impact shock loads. They are bearing supported, delivered grease lubricated and protected against dust of more than 0,3 mm. a supporting bar or shaft on which, or by means of which, a wheel or wheels turn. It resembles a roller bearing but, instead of cylindrical rollers, non-revolving asymmetric figure-eight shaped sprags, or other elements allowing single direction rotation, are used. series ball. Various stators can be ordered for different track conditions, power levels, and vehicle applications. The stock 16 element sprag is in the center, with the 34 element on the right. Technician B says that a clutch pressure plate with warpage sufficient to insert a 0. It unlocks, however, using a roll technique in which the inner and outer roller. One-way roller clutches and one-way sprag clutches are the two forms of one-way clutches. 1-2 shift - Intermediate clutches apply, intermediate sprag stops direct drum holding sun gear. Features. This EWC1010 one-way ball bearing with sprag freewheel backstop clutch is made of chrome steel, is double shielded, and has a steel cage. This is why the spring forces in the roller one-way clutch are designed to be at a minimum in the idling speed range. This Is A New Overdrive One Way Roller Clutch Aka Sprag. 0001 inch. Torque: 210 Nm - 27,500 Nm. Will also go with the TransGo TCC Isolator-Conv Regulator Valve, and NOT use the Sonnax Servo release valve. Kit includes:Compatible with medium loads and easy to install. P and CSK. 0025mm per 25mm travel (0. 3. Several different types of one-way clutches are in use, these include: Roller designs; Sprag designs; Spiral designs; Diode designs Basic Designs. one-way roller clutch KI-ASK--GFK. One-way clutches can be either one-way rollers or sprags. 5725. A band can be used to hold or drive a planetary gearset. When the unit rotates in one direction the rollers slip or free-wheel, but when a torque is applied in the opposite direction, the rollers tilt slightly, producing a. (Based on NTN measurements. 5 in - 15 in. b. 591") OD (B) 35. Precision Bearings;A tire is mounted to a rim, and the rim is mounted to a wheel. One-way roller clutches; Single row cages; Stud-type track rollers; Stud-type track rollers with eccentric. Rotational speed: 160 rpm - 600 rpm. : 1,600 Nm (1,180. , Ltd, is a manufacturer specialized in Producing Various One Way Bearings, One Way Clutch, Overrunning Clutch, Needle Roller Bearings. Min. Products. Reduce Harsh 1-2 Shift Damage. I normally leave the washer alone and cut the front of the planet to suit. Try not to run or drive the car or further damage could result. Roller ramp clutches require one of the surfaces to have ramps and holes for the springs to push the rollers up the ramps. INTRODUCTION There are three major types of One-Way Clutches (OWC): roller, sprag, and pawl. com FREE DELIVERY possible on eligible purchases. The steel. An arrow on the lip indicates the rotational direction that locks the bearings. The type of one-way clutch that uses rollers is called a sprag. Our 400 series one-way bearing element comes with either mounting rings or without.