40x68x21mm JK0S040 Tapered Roller Bearing With Rubber Seal

1. Product Overview

JK0S040 is a compact sprag type one-way clutch needle roller bearing, also known as freewheel backstop bearing. It integrates precision sprag locking structure and needle roller rolling assembly into one unit, realizing unidirectional rotation transmission and instant anti-reverse self-locking function.

The whole unit adopts integrated outer ring, inner race, high-strength sprag group and needle roller assembly, all core components made of fully quenched GCr15 bearing steel with mirror superfinished contact surface. In forward rotation, sprags separate to realize low-friction idle running; once reverse rotation trend occurs, sprags wedge tightly between inner and outer race to lock shaft immediately and prevent reverse slip. Compact integrated structure saves transmission assembly space, stable self-locking performance under medium torque load, low idle friction noise. Widely applied to light-duty gear reducers, packaging machinery conveyors, textile transmission equipment, small lifting machinery and automatic feeding anti-backlash mechanisms.

2. Technical Specifications

Model: JK0S040
Integrated one-way sprag needle roller clutch bearing
Standard installation dimensions matched with standard transmission shaft
Structure: Integrated outer ring, inner race, sprag locking unit + needle roller bearing assembly
Raw material: GCr15 high carbon chromium bearing steel for race, sprag and needle rollers
Maximum allowable transmission torque: 125 N·m
Limit idle rotating speed (grease lubrication): 4600 r/minAllowable operating temperature: -25℃ ~ 120℃
Single unit net weight: 0.086kg
Self-locking response time: Instant locking without reverse clearance
Standard internal pre-filled anti-wear lithium grease, special high temperature grease customizable
Complete reducer installation drawings, torque matching selection guide and long-cycle forward-reverse alternating durability test reports can be provided upon customer request.

3. Core Advantages

• Integrated sprag + needle roller combined design, simultaneously realize unidirectional torque transmission and radial support bearing function, simplify transmission structure and reduce part count.
• High-precision arc sprag group with uniform stress distribution, stable wedge self-locking, no slipping under rated torque load, reliable anti-reverse protection for conveyor and lifting equipment.
• Mirror superfinished contact surface between sprag and raceway, small friction coefficient during forward idle rotation, low heat generation and low operating noise for long-time continuous operation.
• All core components adopt overall quenching heat treatment, surface hardness HRC60-65, outstanding anti-fatigue and wear resistance, extend clutch overhaul cycle.
• Compact lightweight integrated layout, easy direct press-fit installation on standard transmission shaft without additional positioning sleeves, greatly improve assembly efficiency.
• Instant self-locking response, effectively avoid material backflow, conveyor rollback and lifting equipment accidental sliding caused by power failure or shutdown.
• Universal standard installation size, fully interchangeable with global JK0S series one-way clutch bearings, convenient equipment upgrading and aftermarket replacement maintenance.
• Comprehensive customized service: stainless steel anti-rust upgrade, OEM laser marking on outer ring, neutral export carton anti-rust packaging, high temperature resistant extreme pressure grease pre-filling.

4. Application Scenarios

JK0S040 sprag one-way clutch bearing is core anti-reverse unidirectional transmission spare part for light industrial automation machinery:

• Small and medium gear reducer output shaft anti-backlash self-locking assemblies
• Packaging industry belt conveyor, roller conveyor anti-rollback protection units
• Textile spinning and weaving equipment unidirectional transmission rotating components
• Light lifting machine, vertical small feeding machine anti-slip safety bearing positions
• Printing machinery, automatic packaging machine intermittent feeding transmission mechanisms
• Aftermarket interchangeable JK0S series integrated sprag freewheel clutch bearing
• Cost-effective compact anti-reverse one-way transmission bearing solution for reducer manufacturers, packaging automation OEM and light machinery maintenance factories bulk procurement.

5. Why Choose GQZ Bearing

• 25 years professional manufacturing experience of JK0S series integrated sprag one-way clutch needle roller bearings including JK0S040
• JK0S040 fully dimensionally interchangeable with international standard one-way clutch bearings, consistent torque load rating, idle friction and self-locking stability standards.
• Complete OEM & ODM customization service supporting stainless steel anti-corrosion material and special high temperature resistant grease filling.
• Strict full pre-delivery inspection flow: GCr15 raw material hardness test, sprag dimensional sorting screening, long-cycle forward-reverse alternating torque aging test, repeated self-locking fatigue wear test.
• Professional one-way clutch bearing engineering team provides one-on-one torque load matching, lubricant selection and shaft press-fit installation technical guidance within 24 working hours.
• Stable mass production workshop with competitive factory bulk wholesale price for long-term reducer manufacturers, packaging automation equipment suppliers and textile machinery spare parts dealers.
• We specialize in integrated sprag self-locking clutch structure, low-friction needle roller support design, compact interchangeable mounting layout and long-term win-win cooperation with global light industrial automation transmission spare parts buyers.

6. Quality Control

• Raw material chemical composition and hardness inspection for GCr15 bearing steel inner race, outer ring, sprag and needle roller blanks
• Precision forging, quenching & tempering, ultra-mirror finish grinding processing for clutch inner and outer race contact surface
• Arc sprag high-temperature quenching, superfinishing and automatic dimensional sorting production line
• Integrated sprag and needle roller automatic assembly process, strictly control sprag wedge clearance and idle running gap
• Targeted classified performance testing: JK0S040 long-cycle forward-reverse alternating torque aging test, repeated instant self-locking fatigue test, high-temperature grease aging wear detection
• Full dimensional tolerance and surface defect recheck before anti-rust oil coating and export carton packaging shipment
• Every production batch of JK0S040 clutch bearings undergoes full sampling forward-reverse cycle simulation test to guarantee stable long-term anti-reverse self-locking and radial support performance in reducer and conveyor automation equipment.

7. Get A Quote Now

If you need JK0S040 integrated sprag one-way clutch needle roller bearings for gear reducer anti-backlash assembly, packaging conveyor anti-rollback equipment OEM bulk matching and mechanical maintenance, send your purchase inquiry directly.

You will receive full professional supporting services after submitting inquiry:

• Fast official factory formal quotation reply within 24 hours
• One-on-one torque load matching, grease grade selection and shaft press-fit installation technical guidance from professional one-way clutch bearing engineers
• Customized bearing performance solutions including stainless steel anti-rust upgrade and high-temperature resistant extreme pressure grease options
• Competitive direct factory bulk wholesale price for large-volume spare parts orders
• Provide your required purchase quantity, maximum transmission torque and continuous operating temperature environment to obtain detailed sealed formal quotation document.

8. FAQ

1. Q1: What is the core function of JK0S040 one-way clutch bearing?
   A1: It realizes unidirectional rotation transmission, locks the shaft instantly when reverse rotation occurs, prevents conveyor rollback, equipment backsliding and transmission backlash.
2. Q2: What is the advantage of integrated sprag + needle roller structure?
   A2: It combines unidirectional self-locking function and radial load supporting needle roller bearing into one piece, reduces the number of assembly parts and saves equipment internal space.
3. Q3: Can JK0S040 bear large impact torque?
   A3: It is designed for medium light torque working conditions; frequent heavy impact torque needs to select larger model JK0S series clutch bearing.