Product Overview
A Plastic Ratchet Gear works with a pawl to produce indexed movement or one-direction rotation. It is commonly used in automotive lock actuators, seat mechanisms, adjustment controls, and compact motor systems where forward movement must be combined with controlled reverse engagement.
Key Advantages
Defined Drive and Locking Flanks
The asymmetric tooth form gives the drive flank and locking flank different functions. Geometry is set so the pawl enters cleanly in the permitted direction and carries the specified reverse load without riding over the tooth tip.
Root Geometry for Repeated Pawl Contact
A controlled root radius spreads repeated engagement impact into the tooth body. Local stress is reduced at the point where the pawl enters, stops, and releases during each cycle.
Positive Indexing Within a Compact Mechanism
Tooth spacing and pawl clearance set the movement of each index. A small lock or adjustment assembly can advance by a repeatable increment without adding a separate indexing component.
Product Parameters
|
Parameter |
Value |
|
Product Name |
Plastic Ratchet Gear |
|
Available Materials |
POM, PA6 |
|
Gear Precision Grade |
Grade 8 – 11 |
|
Ratchet Tooth Angle |
30° or 45° (custom) |
|
MOQ |
10,000 pcs (mixed allowed) |
Customization Capabilities
The ratchet and pawl are developed as a matched interface. Rotation direction, indexing step, and reverse holding load are used to set flank form and engagement depth.
Hub and bore dimensions follow the shaft and return mechanism. The expected impact frequency and operating temperature determine the material grade and tooth-root structure.
Quality Control
First-piece inspection concentrates on the drive flank, locking flank, and tooth-root form because these surfaces control pawl entry and holding behavior. Bore position is measured from the same functional datum.
A matching pawl or dedicated fixture checks forward indexing, reverse holding, and consistent release through the specified movement cycle.
FAQ
Q: Can samples be supplied before production?
A: Yes. A sample can be supplied before mass production. Custom sample development normally takes about 50 days after the technical data is confirmed.
Q: Which shipping terms are supported?
A: EXW and FOB are supported. Export packaging depends on the gear geometry and shipment method.
Q: Can the ratchet direction be reversed?
A: Yes. Tooth orientation and the pawl approach can be mirrored for clockwise or counterclockwise operation. The drawing must identify the viewing direction and shaft orientation.
Q: What load data is needed for development?
A: Provide maximum forward drive torque, required reverse holding torque, pawl material, cycle count, operating temperature, impact condition, and allowable release torque.
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