DC3175C Sprag Clutch | Industrial One Way Clutch
DC3175C Sprag Clutch is a precision DC Series one way freewheel clutch designed for industrial and automotive transmission applications. Featuring a 31.75mm bore diameter, 48.41mm outer diameter and 25.4mm height structure, it provides reliable one-direction locking, smooth overrunning performance and excellent durability. With a 16-sprag design and high load stability, DC3175C is suitable for demanding power transmission systems. LSTO manufactures professional sprag clutch solutions with OEM customization, strict quality control and global supply capability.
DC3175C Sprag Freewheel Clutch 25.4mm Height for Industrial & Automotive Applications
DC3175C Sprag Clutch | 25.4mm Height DC Series One Way Freewheel Clutch
Introduction: What Is DC3175C Sprag Clutch?
The DC3175C Sprag Clutch is a precision-engineered DC series one way freewheel clutch designed for industrial machinery, automotive components and mechanical transmission systems.
Unlike traditional friction clutches, the DC3175C uses a sprag locking mechanism to achieve automatic engagement and freewheel operation.
Its main functions include:
- One-direction torque transmission
- Automatic mechanical locking
- Overrunning operation
- Backstop protection
When the driving shaft rotates in the locking direction:
- The sprag elements engage
- Inner and outer races lock together
- Torque is transmitted efficiently
When the driven side rotates faster:
- Sprags release automatically
- Free rotation occurs
- Reverse torque is prevented
This design provides excellent efficiency and durability for demanding power transmission applications.
Product Overview
| Item | Specification |
|---|---|
| Model | DC3175C |
| Product Type | Sprag Freewheel Clutch |
| Series | DC Series |
| Structure | One Way Sprag Clutch |
| Bore Diameter | 31.75 mm |
| Outer Diameter | 48.41 mm |
| Height | 25.4 mm |
| Number of Sprags | 16 Sprags |
| Application | Industrial / Automotive |
| Function | Overrunning & Backstopping |
Key Features of DC3175C Sprag Clutch
1. High Height 25.4mm Structure Design
Compared with standard DC3175 models, the DC3175C uses a 25.4mm height configuration.
Advantages:
| Feature | Benefit |
|---|---|
| Increased axial height | Higher load capacity |
| More stable sprag support | Improved reliability |
| Larger contact area | Better torque transmission |
| Heavy-duty structure | Longer service life |
The C-type design is suitable for applications requiring stronger mechanical support and higher operating reliability.
2. Precision 16 Sprag Locking System
DC3175C adopts a multi-sprag mechanical locking structure.
The 16 precision sprags provide:
- Uniform torque distribution
- Fast locking response
- Stable engagement
- Reduced mechanical impact
Working principle:
Drive Direction
- Inner race rotates.
- Sprags tilt into locking position.
- Inner and outer races engage.
- Torque is transmitted.
Freewheel Direction
- Sprags release.
- Relative rotation is allowed.
- Reverse load is eliminated.
3. Compact DC Series Transmission Solution
The DC3175C provides a compact alternative to traditional clutch systems.
Advantages:
- Small installation space
- High mechanical efficiency
- Low maintenance requirement
- Reliable continuous operation
Application Areas
Automotive Applications
DC3175C can be used in:
| Application | Function |
|---|---|
| Transmission System | One-way torque control |
| Drive Assembly | Direction control |
| Vehicle Components | Power transmission |
| Mechanical System | Overrunning |
Industrial Applications
Typical industrial applications include:
| Industry | Usage |
|---|---|
| Textile Machinery | Drive control |
| Conveyor Equipment | Backstop protection |
| Automation Equipment | Rotation control |
| Gearbox System | One-way transmission |
DC3175C type sprag clutches are commonly applied in machinery requiring overrunning and backstop functions.
DC3175C Compared With Traditional Clutch Systems
| Feature | DC3175C Sprag Clutch | Friction Clutch |
|---|---|---|
| Locking Method | Mechanical sprag locking | Friction plates |
| Engagement Speed | Instant | Slower |
| Slip Loss | Very Low | Higher |
| Energy Efficiency | High | Medium |
| Maintenance | Low | Higher |
Why Choose LSTO DC Series Sprag Clutch?
LSTO specializes in manufacturing:
- DC Series Sprag Clutch
- Automotive One Way Clutch
- Industrial Freewheel Clutch
- Transmission Overrunning Clutch
Our manufacturing capabilities include:
Precision Manufacturing
Production processes:
- CNC machining
- Precision grinding
- Heat treatment
- Assembly testing
Quality Control
| Inspection Item | Purpose |
|---|---|
| Material Testing | Ensure mechanical strength |
| Dimensional Inspection | Guarantee installation accuracy |
| Hardness Testing | Improve wear resistance |
| Torque Testing | Verify locking performance |
OEM Replacement & Custom Manufacturing
LSTO supports global customers with:
- OEM replacement
- Drawing-based production
- Customized dimensions
- Sample development
| Service | Customer Benefit |
|---|---|
| Engineering support | Faster product matching |
| Prototype testing | Reduced development risk |
| Mass production | Stable supply |
| Quality control | Reliable performance |
How To Select A DC Sprag Clutch Supplier?
For industrial and automotive buyers, important factors include:
Manufacturing Capability
Evaluate:
- Production experience
- Precision machining ability
- Quality control system
Technical Support
Professional suppliers should provide:
- Product selection support
- Application analysis
- Customized solutions
Supply Reliability
Consider:
- Production capacity
- Delivery stability
- Long-term cooperation ability
FAQ About DC3175C Sprag Clutch
What is DC3175C Sprag Clutch?
DC3175C is a DC series one way sprag freewheel clutch designed for industrial and automotive transmission applications.
What are the dimensions of DC3175C?
The standard dimensions are:
- Bore diameter: 31.75 mm
- Outer diameter: 48.41 mm
- Height: 25.4 mm
How many sprags does DC3175C have?
DC3175C uses 16 precision sprag elements for reliable locking performance.
What is the function of DC3175C?
It allows free rotation in one direction while automatically locking in the opposite direction for torque transmission and backstop applications.
Can LSTO manufacture DC3175C replacement products?
Yes. LSTO provides OEM replacement and customized DC series sprag clutch manufacturing solutions.
Conclusion
The DC3175C Sprag Clutch is a high-performance DC Series one way freewheel clutch designed for industrial machinery and automotive transmission systems.
With its 25.4mm high structure, 16-sprag locking design and reliable mechanical performance, DC3175C provides stable torque transmission, fast engagement and long service life in demanding applications.
LSTO specializes in Sprag Clutch, One Way Clutch and Freewheel Clutch manufacturing, providing OEM replacement, customized engineering and reliable global supply solutions.

















