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The CSK35 series (CSK35, CSK35P, CSK35PP) are high-speed, one-way sprag clutch bearings (35×72×17 mm) designed to transmit torque in one direction while allowing free overrunning in the opposite direction. Featuring a high torque capacity (up to 140 Nm) and stainless steel construction, these bearings are essential for backstop and indexing applications in industrial machinery. We supply B2B bulk orders with flexible payment terms and fast lead times (5–10 days for in-stock items)—contact us today with your required keyway type and quantity.
The CSK35 Series One-Way Bearing is a sprag-type freewheel integrated into a 6207 series ball bearing footprint. This design allows the bearing to support radial loads while acting as an instant-locking mechanism. It is widely used in applications where reverse rotation must be strictly prevented during power loss or normal operation, such as conveyors, textile machinery, and lifting equipment.
The CSK series is defined by its keyway configurations, which prevent the bearing from slipping under heavy torque. Please specify the exact suffix when requesting a quote:
Item | Specification |
Bearing size (ID × OD × W) | 35 × 72 × 17 mm |
Model CSK35 | No keyway (press-fit installation) |
Model CSK35P | One keyway on the inner race |
Model CSK35PP | Two keyways (internal and external race) |
Material | Stainless steel |
Rated torque capacity | 140 N·m |
Max speed | 3,600 RPM |
Product weight | ≈ 0.30 kg |
In addition to the 35 mm size, we supply the complete CSK lineup to meet your comprehensive sourcing needs:
CSK8 / CSK8P / CSK8PP (8×22×9 mm, 0.02 kg)
CSK12 / CSK12P / CSK12PP (12×32×10 mm, 0.04 kg)
CSK15 / CSK15P / CSK15PP (15×35×11 mm, 0.06 kg)
CSK17 / CSK17P / CSK17PP (17×40×12 mm, 0.07 kg)
CSK20 / CSK20P / CSK20PP (20×47×14 mm, 0.11 kg)
CSK25 / CSK25P / CSK25PP (25×52×15 mm, 0.14 kg)
CSK30 / CSK30P / CSK30PP (30×62×16 mm, 0.21 kg)
CSK35 / CSK35P / CSK35PP (35×72×17 mm, 0.30 kg)
CSK40 / CSK40P / CSK40PP (40×80×22 mm, 0.50 kg)
Because they provide instant locking with zero backlash, CSK bearings are utilized globally by machinery manufacturers. Typical applications include:
Backstop / anti-rollback: Material handling conveyors and inclined elevators.
Overrunning: Starter drives and multi-motor drive systems.
Indexing: Feed mechanisms in packaging and printing machines.
We are optimized for B2B procurement, offering reliable supply chains and flexible trading terms:
Lead Time: 5–10 work days for in-stock items; 20–30 work days for customized/bulk production.
Payment Terms:
Under $1,000 USD: 100% advance payment.
$1,000 to $5,000 USD: 50% deposit, 50% balance before delivery.
Payment Methods: T/T, Western Union, PayPal. L/C accepted for large orders.
Trade Terms: FCA, FOB, CIF, or DDP (direct delivery to USA warehouses available).
Q1: How do I know which version (CSK35, CSK35P, or CSK35PP) I need?
A: It depends on your shaft and housing design. If relying purely on a tight press-fit to transmit torque, use the standard CSK35. If your shaft has a keyway, use the CSK35P. If both the shaft and the housing have keyways to prevent high-torque slip, choose the CSK35PP.
Q2: Are these bearings pre-lubricated?
A: Yes, the CSK series is factory-lubricated with grease and shielded against dust, making them ready to mount directly out of the box.
Q3: Is the rotational direction marked on the bearing?
A: Yes, an arrow is typically laser-etched onto the inner race to indicate the freewheeling (unlocked) direction for easy and error-free installation.
Q4: Can you provide custom packaging or marking?
A: Yes, as a wholesale manufacturer, we can provide neutral packaging or customize the boxes and bearing markings to match your company's branding.
The CSK35 Series One-Way Bearing is a sprag-type freewheel integrated into a 6207 series ball bearing footprint. This design allows the bearing to support radial loads while acting as an instant-locking mechanism. It is widely used in applications where reverse rotation must be strictly prevented during power loss or normal operation, such as conveyors, textile machinery, and lifting equipment.
The CSK series is defined by its keyway configurations, which prevent the bearing from slipping under heavy torque. Please specify the exact suffix when requesting a quote:
Item | Specification |
Bearing size (ID × OD × W) | 35 × 72 × 17 mm |
Model CSK35 | No keyway (press-fit installation) |
Model CSK35P | One keyway on the inner race |
Model CSK35PP | Two keyways (internal and external race) |
Material | Stainless steel |
Rated torque capacity | 140 N·m |
Max speed | 3,600 RPM |
Product weight | ≈ 0.30 kg |
In addition to the 35 mm size, we supply the complete CSK lineup to meet your comprehensive sourcing needs:
CSK8 / CSK8P / CSK8PP (8×22×9 mm, 0.02 kg)
CSK12 / CSK12P / CSK12PP (12×32×10 mm, 0.04 kg)
CSK15 / CSK15P / CSK15PP (15×35×11 mm, 0.06 kg)
CSK17 / CSK17P / CSK17PP (17×40×12 mm, 0.07 kg)
CSK20 / CSK20P / CSK20PP (20×47×14 mm, 0.11 kg)
CSK25 / CSK25P / CSK25PP (25×52×15 mm, 0.14 kg)
CSK30 / CSK30P / CSK30PP (30×62×16 mm, 0.21 kg)
CSK35 / CSK35P / CSK35PP (35×72×17 mm, 0.30 kg)
CSK40 / CSK40P / CSK40PP (40×80×22 mm, 0.50 kg)
Because they provide instant locking with zero backlash, CSK bearings are utilized globally by machinery manufacturers. Typical applications include:
Backstop / anti-rollback: Material handling conveyors and inclined elevators.
Overrunning: Starter drives and multi-motor drive systems.
Indexing: Feed mechanisms in packaging and printing machines.
We are optimized for B2B procurement, offering reliable supply chains and flexible trading terms:
Lead Time: 5–10 work days for in-stock items; 20–30 work days for customized/bulk production.
Payment Terms:
Under $1,000 USD: 100% advance payment.
$1,000 to $5,000 USD: 50% deposit, 50% balance before delivery.
Payment Methods: T/T, Western Union, PayPal. L/C accepted for large orders.
Trade Terms: FCA, FOB, CIF, or DDP (direct delivery to USA warehouses available).
Q1: How do I know which version (CSK35, CSK35P, or CSK35PP) I need?
A: It depends on your shaft and housing design. If relying purely on a tight press-fit to transmit torque, use the standard CSK35. If your shaft has a keyway, use the CSK35P. If both the shaft and the housing have keyways to prevent high-torque slip, choose the CSK35PP.
Q2: Are these bearings pre-lubricated?
A: Yes, the CSK series is factory-lubricated with grease and shielded against dust, making them ready to mount directly out of the box.
Q3: Is the rotational direction marked on the bearing?
A: Yes, an arrow is typically laser-etched onto the inner race to indicate the freewheeling (unlocked) direction for easy and error-free installation.
Q4: Can you provide custom packaging or marking?
A: Yes, as a wholesale manufacturer, we can provide neutral packaging or customize the boxes and bearing markings to match your company's branding.
