🏗️ 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.
custom ground helical gear rack manufacturer
Custom Ground Helical Gear Racks
High-precision DIN 6 and DIN 7 CNC ground helical gear racks and matched pinions engineered for fiber laser cutting tables, robotics, and high-speed gantries.
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 Ground Helical Gear Racks manufacturing starts with confirmed technical requirements.
Review the gear pair, assembly conditions, drawing requirements, specification checks, and inspection points before requesting a quotation.
High-precision ground helical gear racks are the standard driving solution for dynamic linear motion systems requiring exceptional positioning accuracy, high feed forces, low vibration, and quiet operation at high speeds (up to 300 m/min). The 19°31'42" helix angle produces a higher contact ratio, ensuring continuous multi-tooth engagement that distributes dynamic cutting forces and minimizes velocity ripple. ZhongYi manufactures precision ground helical racks in DIN 6 (cumulative pitch error ≤ 0.035 mm/1000 mm) and DIN 7 grades from vacuum-degassed alloy steel (42CrMo / AISI 4140, 20CrMnTi) and normalized carbon steel (C45). The manufacturing process features 6-side high-precision CNC surface grinding for exact reference datums, deep induction tooth flank hardening (HRC 50-60), CNC generative tooth profile grinding (Ra 0.4 - 0.8 µm), and precision pitch-controlled butt-joint end machining with pre-drilled counterbored mounting holes.
Tooth Accuracy DIN 5-7 / AGMA 11-13
Tooth Finishing CNC Ground (Ra ≤0.4µm)
Hardness Grade Carburized 58-62 HRC
Custom Ground Helical Gear Racks Factory Genuine Spec
Selection guidance
How to specify a custom ground helical gear racks for quotation.
Use application and mating-component data to confirm geometry, materials, mounting details, and the acceptance plan.
Specify the required pitch accuracy grade (DIN 6 for high-precision machine tools, DIN 7 for high-speed transfer gantries). Standard helical racks use a 19°31'42" right-hand helix, requiring a left-hand mating pinion. For continuous multi-meter travel, specify "continuous end-machined" racks so the pitch remains uninterrupted across adjacent segments. Always use an installation companion rack (a short inverted rack segment) during assembly to verify pitch spacing across the butt joint before torquing mounting bolts.
Technical specifications
Core technical parameters for engineering and procurement review.
| Accuracy standards | DIN 6 (pitch error ≤ 0.035 mm/m) or DIN 7 (pitch error ≤ 0.060 mm/m) |
|---|---|
| Helix geometry | 19°31'42" Right-Hand (standard) or Left-Hand helix, 20° normal pressure angle |
| Module range | Module M1.5, M2, M3, M4, M5, M6, M8, M10 (custom modules available) |
| Cross sections | Square or rectangular ground bar: 19x19, 24x24, 29x29, 39x39, 49x49, 59x59, 79x79 mm |
| Standard lengths | 500 mm, 1000 mm, 2000 mm with continuous pitch-matched butt-joint ends |
| Materials & Hardness | 42CrMo (HRC 52-58), C45 (HRC 50-55), 20CrMnTi carburized (HRC 58-62) |
Custom options
Manufacturing details that can be reviewed before quotation.
- DIN 6 fully ground racks with 6-side CNC datum finishing for laser cutting gantries
- Continuous butt-joint pitch-matched end machining for infinite jointed travel lengths
- Pre-machined top, bottom, or side counterbored bolt holes and precision dowel pin holes
- Matched ground helical pinions, integral pinion shafts, and splined/keyed bores
- Black oxide, nickel plating, or anti-corrosion protective coatings for humid environments
Quality control
Inspection points tied to the approved technical file.
- Laser interferometer inspection for cumulative pitch error (Fp) and single pitch error (fpt)
- 6-face precision granite table verification of straightness, parallelism, and squareness
- CNC gear measuring center check of tooth profile error (Fα) and lead helix angle (Fβ)
- Ultrasonic NDT inspection and microhardness profile verification across the hardened case depth
All products can be custom manufactured from 2D/3D CAD drawings or physical samples.
Quality Control & Inspection Matrix
Engineering Evidence & 100% Inspection for Custom Ground Helical Gear Racks.
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:
Ground helical rack accuracy is 100% verified using multi-axis laser interferometers, CNC gear measuring instruments, and precision coordinate measuring machines. Each rack is marked with its serialized batch number, DIN accuracy grade, and datum reference face. A full dimensional inspection protocol, pitch error graph, and material certificate (EN 10204 3.1) are supplied with each export shipment.
Zeiss / Hexagon 3D CMM
Validates 3D spatial GD&T, bore concentricity, center distance, and geometric tolerances down to ±0.002 mm.
Klingelnberg CNC Gear Analyzer
Inspects involute tooth profile error (fα), lead crowning (fβ), pitch cumulative error (Fp), and radial runout (Fr).
Digital Micro-Vickers & Rockwell Testers
Verifies surface hardness (58–62 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 Ground Helical Gear Racks operating environments.
Confirm load, speed, duty cycle, environment, lubrication, and assembly constraints before selecting the final material and manufacturing route.
- High-power fiber laser cutting machines, plasma cutting tables, and waterjet cutters
- High-speed CNC gantry milling centers, machining centers, and heavy woodworking routers
- Robotic 7th-axis linear track systems and automated warehouse transfer shuttles
- Automotive body-in-white transfer lines and heavy-load linear positioning axes
Application Markets
View All 5 Industry Hubs →
Where Custom Ground Helical Gear Racks Are Engineered & Deployed
Discover how this gear category meets extreme torque, low backlash, quiet operation, and weather-resistance demands in primary industry sectors:
🤖 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.
🌾 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 ground helical gear racks products.
Critical specifications are confirmed against final drawings before production.
Why is the standard helix angle for gear racks 19°31'42"? ▼
At 19°31'42", the cosine of the helix angle equals π/10 (approx. 0.9428), which makes the transverse pitch (pt) equal to a simple round metric number (pt = π * m / cos(β) = 10 * m * 0.1 * π / ...), simplifying pinion sizing and linear travel per revolution calculations.
How do I achieve seamless jointing when installing multiple 1000 mm racks? ▼
Our ground racks feature precision pitch-split end faces. During machine installation, clamp an inverted 100 mm companion rack across the joint between two consecutive racks to align the pitch line precisely before tightening the mounting screws and reaming dowel pins.
What are the advantages of 42CrMo alloy steel over standard C45 steel for racks? ▼
42CrMo (AISI 4140) offers superior tensile strength (> 980 MPa vs 600 MPa for C45), higher core toughness, and greater resistance to tooth root fatigue and shock loading during rapid acceleration and deceleration (up to 2.5G).
24-Hour Engineering Quote & DFM Review
Upload Your Drawings for Custom Ground Helical Gear Racks 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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