Standard CP racks and pinions
Matched components selected around circular pitch, tooth count, travel, and mounting requirements.
circular pitch rack and pinion
Circular Pitch Rack and Pinion
Custom CP racks and pinions for applications that use convenient whole-millimetre travel per pinion revolution.
Customization
100% to Drawing / Sample
Precision Grade
DIN 4-7 / AGMA 11-13
Engineering DFM
< 24 Hours Turnaround
Quality System
ISO 9001:2015
Featured Product Model & RFQ Specifications
Custom Circular Pitch (CP) Rack and Pinion
Precision CP gear racks and matched pinions designed for whole-millimeter travel per pinion rotation in indexing, automation, and packaging machinery.
Product type
Circular pitch (CP) linear gear rack with matched pinion
Standard pitches
CP 2.5 mm, CP 5 mm, CP 10 mm, CP 15 mm, CP 20 mm (or custom pitches by drawing)
Tooth forms
Straight CP teeth or helical CP teeth (typically 19ยฐ31'42" helix angle)
Rack lengths
500 mm, 1000 mm, 1500 mm, 2000 mm sections, or custom lengths with machined end joints
Manufacturing capability
Technical Overview & Engineering Capability for circular pitch rack and pinion.
A circular pitch rack and pinion, often shortened to a CP rack and pinion, is organized by linear circular pitch rather than conventional module naming. Its main design advantage is straightforward travel planning: a compatible pinion can be selected so one revolution produces a convenient linear movement. ZhongYi reviews custom CP rack-and-pinion drawings for pitch, pinion tooth count, expected travel per revolution, pressure angle, rack length, mounting holes, material, heat treatment, backlash, and positioning duty. CP components must be kept separate from ordinary module racks because similar-looking parts are not automatically interchangeable.
Tooth Accuracy DIN 4-7 / AGMA 11-13
Tooth Finishing CNC Ground (Ra โค0.4ยตm)
Heat Treatment Carburized 58-62 HRC
Product types & variants
Circular Pitch Rack and Pinion types and manufacturing paths.
The final product form is confirmed from the buyer drawing, mating component, assembly layout, operating conditions, and inspection requirements.
Tapered CP systems
Axially adjustable rack-and-pinion forms that may be used where the mechanism is designed to adjust backlash.
Hardened or ground CP racks
Wear- and accuracy-conscious components with heat treatment and finishing defined by the approved drawing.
Round or special CP racks
Custom structural forms for moving-rack layouts, restricted mounting space, or a purpose-built positioning mechanism.
Selection & Metallurgy guidance
How to specify the correct circular pitch rack and pinion configuration.
Define the desired linear movement for one pinion revolution before choosing tooth count. The design should then confirm pitch, pressure angle, pinion diameter, rack length, stroke, mounting height, and whether the rack is used in one piece or joined sections. Backlash becomes particularly important when the axis reverses direction. The RFQ should state positioning tolerance, repeatability expectation, load, speed, acceleration, duty cycle, lubrication, and the method used to support and align the rack.
Material & Heat Treatment Options
- Carbon steel for general CP rack systems
- Alloy steel for specified hardening and grinding routes
- Stainless steel where the drawing requires corrosion resistance
- Alternative materials reviewed for load and dimensional stability
Engineering Selection Factors
- Circular pitch, pressure angle, and pinion tooth count
- Required travel per revolution and total stroke
- Rack length, pitch-line height, joint, and mounting pattern
- Backlash adjustment, reversing motion, and positioning accuracy
- Material, hardening, finishing, lubrication, and environment
Quality Control & Inspection Matrix
Engineering Evidence & 100% Inspection for Circular Pitch Rack and Pinion.
Overseas procurement teams require verifiable technical data, not unsupported claims. Every production batch at ZhongYi is inspected against approved CAD blueprints and international standards (DIN, AGMA, ISO).
Component-Specific Quality Focus:
For a custom circular pitch rack and pinion, ZhongYi reviews the rack and pinion as a functional pair. Drawing control should cover pitch, tooth count, travel calculation, datum surfaces, hole pattern, rack joint, heat treatment, and inspection method. Depending on the requirement, inspection may address tooth thickness, cumulative pitch, pitch-line height, straightness, hardness, pinion runout, and assembly movement. Buyers should verify the completed travel calculation in their mechanism before ordering; no positioning accuracy is promised without an agreed tolerance and inspection plan.
Zeiss / Hexagon 3D CMM
Validates 3D spatial GD&T, bore concentricity, center distance, and geometric tolerances down to ยฑ0.002 mm.
Klingelnberg CNC Gear Analyzer
Inspects involute tooth profile error (fฮฑ), lead crowning (fฮฒ), pitch cumulative error (Fp), and radial runout (Fr).
Digital Micro-Vickers & Rockwell Testers
Verifies surface hardness (58โ62 HRC), core toughness, and effective carburized / nitrided case depth gradient.
Direct-Reading Optical Spectrometer
100% chemical composition verification of alloy steel forgings (20CrMnTi, 42CrMo, 18CrNiMo7-6, Stainless, POM).
Inspection Deliverables with Every Shipment
Complete Batch Traceability & Certified Test Reports
- EN 10204 Type 3.1 Mill Test Certificate (Chemical & Mechanical Properties)
- Zeiss 3D CMM Full Dimensional Inspection Sheet
- Klingelnberg Tooth Profile & Lead Crowning Graph Report
- Effective Carburized Case Depth & Hardness Curve Data
- 100% Pre-Shipment Visual, Thread & Anti-Rust Quality Verification
Our Factory Quality Commitment:
We maintain strict incoming material spectroscopy, in-process CNC tooth coordinate monitoring, and 100% final pre-shipment dimensional inspection. All custom gear batches are backed by our full manufacturing warranty.
ISO 9001:2015 Certified
DIN 4-7 / AGMA 11-13 Standards
Application fit
Circular Pitch Rack and Pinion operating environments.
Match the gear type with real machinery conditions, operating environment, load, speed, and replacement requirements.
- Linear positioning and indexing equipment
- Automation axes and handling systems
- Packaging, printing, and machine adjustment mechanisms
- Applications needing convenient metric travel per rotation
Application Markets
View All 5 Industry Hubs โ
Where Circular Pitch Rack and Pinion Are Engineered & Deployed
Discover how this gear category meets extreme torque, low backlash, quiet operation, and weather-resistance demands in primary industry sectors:
๐๏ธ Heavy-Duty & High-Impact Transmission
Construction & Mining Machinery
High-torque, impact-resistant gears, girth rings, and planetary drive sets engineered for excavators, cranes, drilling rigs, and heavy mining crushers.
๐ค Sub-Arcminute Motion & Dynamic Positioning
Automation & Robotics
Low-backlash, ultra-precise fine-pitch gears, ground helical racks, and planetary gearheads for robotics, AGV wheel drives, and high-speed motion axes.
๐พ Rugged Heavy-Torque Transmission
Agriculture & Farm Equipment
High-torque bevel gears, spur gears, and splined drive shafts for tractors, harvesters, rotary tillers, and agricultural PTO gearboxes.
Technical FAQ
Common technical and purchasing questions for Circular Pitch Rack and Pinion.
These answers support early engineering and procurement review. Final dimensions, materials, tolerances, and process requirements are confirmed against the approved drawing file.
How is a CP rack different from a module gear rack? โผ
A CP rack is specified by circular pitch in millimetres, while a conventional metric rack is generally specified by module. The two systems can produce different pitch geometry and should not be mixed without a complete compatibility calculation.
Why use a circular pitch rack and pinion? โผ
It can simplify motion planning because the pinion may be selected for a convenient whole-millimetre travel per revolution. The actual movement still depends on the confirmed pitch and tooth count.
Can backlash be adjusted in a CP rack system? โผ
Backlash may be controlled through mounting distance or a purpose-designed tapered or split arrangement. The adjustment method must be built into the mechanism and identified in the rack-and-pinion drawings.
24-Hour Engineering Quote & DFM Review
Upload Your Drawings for Circular Pitch Rack and Pinion Manufacturing
Send your 2D blueprints or 3D CAD models. Our senior gear engineering team will review tooth geometry, module/pitch, materials, heat treatment feasibility, and provide transparent factory pricing within 24 hours.
Supported CAD Blueprint & Drawing Formats:
STEP (.step / .stp) AutoCAD (.dwg / .dxf) IGES (.igs) SolidWorks / 3D CAD PDF Technical Blueprints Worn Physical Samples
Mutual NDA Protection
We sign strict Non-Disclosure Agreements to safeguard proprietary designs.
< 24h DFM Feedback
Rapid manufacturability review, tolerance checks, and unit quotation.
Direct Factory Engineering
Direct technical communication with senior master gear artisans.
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