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.
circular pitch rack and pinion manufacturer
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.
Request a Quote for Custom Circular Pitch (CP) Rack and Pinion
โ Back to Circular Pitch Rack and Pinion
Customization
100% to CAD / Sample
Precision Grade
DIN 4-7 / AGMA 11-13
DFM Analysis
< 24 Hours Turnaround
Quality System
ISO 9001:2015
Product overview
Custom Circular Pitch (CP) Rack and Pinion manufacturing starts with confirmed technical requirements.
Review the gear pair, assembly conditions, drawing requirements, specification checks, and inspection points before requesting a quotation.
A circular pitch (CP) rack and pinion is defined by a linear pitch expressed in exact millimeters (such as CP 2.5, CP 5, CP 10, CP 15, or CP 20) rather than standard metric module (where pitch is m ร ฯ). The key engineering advantage of a CP system is that a pinion with a given number of teeth produces an exact integer millimeter of linear travel per full rotation (Travel = CP ร Number of Pinion Teeth). This eliminates fractional encoder pulse calculations in CNC positioning, printing equipment, indexing carriages, and packaging machines. ZhongYi manufactures custom CP racks and matched pinions from customer drawings or sample components, with options for straight or helical teeth, precision ground surfaces, and continuous joint configurations.
Tooth Accuracy DIN 5-7 / AGMA 11-13
Tooth Finishing CNC Ground (Ra โค0.4ยตm)
Hardness Grade Carburized 58-62 HRC
Custom Circular Pitch (CP) Rack and Pinion Factory Genuine Spec
Selection guidance
How to specify a custom circular pitch (cp) rack and pinion for quotation.
Use application and mating-component data to confirm geometry, materials, mounting details, and the acceptance plan.
Determine the target linear travel per motor rotation before selecting the pinion tooth count. For instance, using a CP 5 rack with a 20-tooth pinion delivers exactly 100 mm of travel per revolution. Verify total axis stroke, continuous joining requirements, mounting hole pitch, pitch-line height datum, and load requirements. CP racks must never be mixed with standard module racks because their pitch values differ (e.g., Module 3 pitch is 9.4248 mm, whereas CP 10 pitch is 10.0000 mm).
Technical specifications
Core technical parameters for engineering and procurement review.
| 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 |
| Materials | Carbon steel (1045 / C45), alloy steel (40Cr, 42CrMo), stainless steel (304), POM / Nylon |
| Mounting details | Side or back mounting holes (counterbored, through-drilled, or tapped) per approved drawing |
Custom options
Manufacturing details that can be reviewed before quotation.
- Straight CP rack or helical CP rack configuration
- Precision milled or hardened and ground tooth finishing (DIN 6 / DIN 7 accuracy)
- Machined continuous-joint ends for uninterrupted multi-section travel
- Matched CP pinions with finished bores, keyways, splines, or integral drive shafts
- Surface treatments including black oxide, induction hardening, or nickel plating
Quality control
Inspection points tied to the approved technical file.
- Verification of circular pitch calculation and pinion tooth count match prior to quotation
- Pitch-line height measurement, rack straightness, and cross-sectional squareness inspection
- Single-pitch error (fp) and cumulative pitch error (Fp) controlled across each segment
- End-machining joint alignment verification using reference joining gauges
All products can be custom manufactured from 2D/3D CAD drawings or physical samples.
Quality Control & Inspection Matrix
Engineering Evidence & 100% Inspection for Custom Circular Pitch (CP) 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:
CP rack quality is measured against cumulative pitch error, tooth profile accuracy, and pitch-line parallelism to the mounting base. For joined long-travel systems, each rack segment undergoes end-face tooth pitch verification to ensure seamless mesh across joints. Hardness and dimensional inspection reports are provided in accordance with the agreed quality 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
Applications
Custom Circular Pitch (CP) Rack and Pinion operating environments.
Confirm load, speed, duty cycle, environment, lubrication, and assembly constraints before selecting the final material and manufacturing route.
- Digital printing machinery, cutting plotters, and flatbed printers
- Packaging, labelling, and high-speed cartooning machinery
- Automation gantries, pick-and-place indexing axes, and robotic transfer tables
- Glass and woodworking machinery requiring whole-millimeter position feedback
Application Markets
View All 5 Industry Hubs โ
Where Custom Circular Pitch (CP) 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:
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 questions before ordering custom circular pitch (cp) rack and pinion products.
Critical specifications are confirmed against final drawings before production.
Why choose a CP rack over a standard module gear rack? โผ
A CP rack provides whole-millimeter travel per revolution, simplifying programming and calibration in digital motion controllers without recurring decimal rounding errors.
Can a standard module pinion run on a CP gear rack? โผ
No. Standard module racks have pitches based on multiples of ฯ (e.g. M2 = 6.283 mm), whereas CP racks use round millimeter pitches (e.g. CP5 = 5.000 mm). They are incompatible and will bind.
How are CP racks joined for long travel? โผ
Racks designed for continuous travel feature precisely machined end faces with half-tooth spacing. During installation, an inverted companion rack segment is clamped across the joint to establish exact pitch alignment before tightening mounting bolts.
24-Hour Engineering Quote & DFM Review
Upload Your Drawings for Custom Circular Pitch (CP) 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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