Construction & Mining Machinery
High-torque, impact-resistant gears, girth rings, and planetary drive sets engineered for excavators, cranes, drilling rigs, and heavy mining crushers.
ZhongYi Gear Manufacturer (a member of ZhongYi Machinery)
custom gear rack and pinion manufacturer
Matched rack-and-pinion components made from drawings for linear motion, positioning, lifting, steering, and machinery automation.
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
Review the gear pair, assembly conditions, drawing requirements, specification checks, and inspection points before requesting a quotation.
A gear rack converts pinion rotation into linear travel, so tooth geometry, mounting straightness, and the machine structure must be considered together. ZhongYi reviews straight or helical rack-and-pinion enquiries from drawings and confirmed application data. The review can include module or circular pitch, pressure angle, rack length, pinion tooth count, pitch diameter, travel per revolution, mounting-hole pattern, joining method, material, heat treatment, tooth finishing, backlash, and lubrication. Long travel systems may use multiple rack sections; end machining, pitch continuity, datum location, and installation adjustment then become part of the design review. A rack and pinion should not be selected from appearance or overall size alone, because matching geometry and mounting conditions determine whether the set will mesh correctly.
Selection guidance
Use application and mating-component data to confirm geometry, materials, mounting details, and the acceptance plan.
Define the required linear travel, force, speed, duty cycle, and positioning expectation first. Module or pitch, pressure angle, pinion tooth count, and pitch diameter determine travel per revolution and basic mesh compatibility. Review rack support, mounting-hole location, alignment tolerance, lubrication, contamination, and how backlash will be adjusted. For multiple sections, provide the joint layout and identify whether the tooth phase must remain continuous across each connection. The RFQ should also state material, heat treatment, rack length limits, pinion bore and keyway, quantity, and inspection criteria.
Technical specifications
| Product type | Straight or helical gear rack with matched pinion by drawing |
|---|---|
| Motion function | Rotary-to-linear conversion for positioning, transfer, lifting, or steering |
| Tooth data | Module or circular pitch, pressure angle, helix data where applicable, and pinion tooth count |
| Rack details | Section length, cross-section, mounting holes, end machining, and joint arrangement |
| Materials | Carbon steel, alloy steel, stainless steel, engineering plastic, or specified material |
| Order confirmation | Travel, load, speed, lubrication, backlash, quantity, and inspection requirements per RFQ |
Custom options
Quality control
All products can be custom manufactured from 2D/3D CAD drawings or physical samples.
Quality Control & Inspection Matrix
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:
Reliable rack-and-pinion motion depends on both manufactured geometry and installation. Inspection can cover rack cross-section, mounting features, straightness, pitch-related characteristics, tooth thickness, pinion runout, hardness, and mating or rolling checks when included in the agreed plan. Installation surfaces, alignment, support spacing, lubrication, and backlash adjustment remain application responsibilities and should be discussed before manufacture. No positioning accuracy or load rating is assumed without the buyer design and acceptance criteria.
Validates 3D spatial GD&T, bore concentricity, center distance, and geometric tolerances down to ยฑ0.002 mm.
Inspects involute tooth profile error (fฮฑ), lead crowning (fฮฒ), pitch cumulative error (Fp), and radial runout (Fr).
Verifies surface hardness (58โ62 HRC), core toughness, and effective carburized / nitrided case depth gradient.
100% chemical composition verification of alloy steel forgings (20CrMnTi, 42CrMo, 18CrNiMo7-6, Stainless, POM).
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.
Applications
Confirm load, speed, duty cycle, environment, lubrication, and assembly constraints before selecting the final material and manufacturing route.
Discover how this gear category meets extreme torque, low backlash, quiet operation, and weather-resistance demands in primary industry sectors:
High-torque, impact-resistant gears, girth rings, and planetary drive sets engineered for excavators, cranes, drilling rigs, and heavy mining crushers.
Low-backlash, ultra-precise fine-pitch gears, ground helical racks, and planetary gearheads for robotics, AGV wheel drives, and high-speed motion axes.
High-torque bevel gears, spur gears, and splined drive shafts for tractors, harvesters, rotary tillers, and agricultural PTO gearboxes.
Technical FAQ
Critical specifications are confirmed against final drawings before production.
Provide rack module or pitch, pressure angle, rack cross-section and length, pinion tooth count, bore and keyway, mounting-hole pattern, travel, load, speed, lubrication, material, heat treatment, quantity, and a drawing of the installed arrangement.
Yes, sectional construction can be reviewed. End machining, tooth phase, mounting datums, section numbering, installation adjustment, and a method for checking the joint should be defined before production.
Backlash depends on tooth geometry, center distance, mounting accuracy, deflection, and the adjustment method. State the application target and assembly arrangement so manufacturing tolerances and installation provisions can be reviewed together.
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.
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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