KHK CP Rack Catalogue

Product catalog summary

Overview: The document provides comprehensive specifications and guidelines for KHK stock CP racks and pinions, crucial for precise linear motion applications. It details gear types, materials, and technical considerations for optimal performance.

Specifications:

Types of Gears: Includes CP Spur Gears, Ground Spur Gears, Tapered Pinions, each with specific catalog numbers.
Materials: Materials like S45C, SUS303, SCM440, and SS400 are used, offering properties such as rust resistance and strength.
Dimensions: Circular pitches range from 2.5mm to 20mm, with lengths from 100mm to 2000mm, and up to 4000mm for flexible racks.

Procedures and Recommendations:

Selection Hints: Ensure compatibility of CP racks with spur gears of the same pitch. Verify mating gear selection.
Assembly Cautions: Proper mounting is crucial to prevent shifting. Use dowel pins for secure attachment.
Secondary Operations: Avoid reducing face width to maintain precision. Induction hardening may affect pitch precision.

Standards and Calculations:

Gear Strength: Calculations based on JGMA specifications, considering load direction and safety factors.
Precision Standards: KHK establishes precision standards for racks, including pitch error and backlash considerations.

Special Features:

Tapered Racks and Pinions: Offer easy backlash adjustment by moving the pinion axially, suitable for zero backlash applications.
Feature Icons: Indicate product characteristics such as RoHS compliance, re-machinability, and heat treatment.

Application Hints:

Ensure proper mounting distance for correct backlash. Use high precision bases for ground racks.
Consider pitch tolerance when connecting racks to avoid meshing issues.

Contact Information: For further assistance, contact KHK CO., LTD. via phone or email.

Steel Spur Gears Specifications:
- Circular Pitch: 2.5 to 20SSCP
- Precision Grade: JIS grade N8, JIS grade 4
- Gear Teeth: Standard full depth
- Pressure Angle: 20°
- Material: S45C
- Heat Treatment: None
- Tooth Hardness: Less than 194HB

Thermal Refined Racks Specifications:
- Circular Pitch: 5, 10KRCPF
- Precision Grade: KHK R 001 grade 4
- Gear Teeth: Standard full depth
- Pressure Angle: 20°
- Material: SCM440
- Heat Treatment: Thermal refining only
- Tooth Hardness: 250 to 285HB

Stainless Steel Spur Gears Specifications:
- Circular Pitch: 5, 10SUSCP
- Precision Grade: JIS grade N8, JIS grade 4
- Gear Teeth: Standard full depth
- Pressure Angle: 20°
- Material: SUS303
- Heat Treatment: None
- Tooth Hardness: Less than 187HB

General Cautions:
- Allowable forces and torques are calculated values based on assumed usage conditions.
- Backlash values depend on mating pinions.
- Fasten racks with dowel pins to prevent screw breakage under heavy loads.
- For stainless steel products, heat treatment and passivation are applied for rust resistance.

Specifications and Parameters:

Products: SROCP2.5-500, SROCP5-500, SROCP10-1000
Outside Diameter: 200 mm
Height to Pitch Line: 99 mm
Allowable Force (N): 474, 1650, 6610
Allowable Force (kgf): 48.3, 169, 674
Weight (kg): 0.29, 0.65, 5.20

Product Characteristics:

Allowable forces are calculated based on assumed usage conditions.
Backlash varies with mating pinions.

Secondary Operations:

Refer to “Caution on Performing Secondary Operations” for safety concerns.
Avoid hardening Round Racks due to potential deformation.

Additional Product Characteristics:

Minimum radius of curvature for metal flexible racks with a 20-tooth pinion: 150 mm (exterior), 300 mm (interior).
Not suitable for applications requiring positioning accuracy.
Tolerance for height (C): 0 to -0.15; width of base (F): 0 to -0.1.

Fastening Example: