Straight gear racks
General linear-motion racks that mate with spur pinions and can include mounting holes, machined ends, or joined lengths.
custom gear rack and pinion
Gear Racks and Pinions
Custom straight, helical, hardened, round, and corrosion-resistant rack-and-pinion components for linear motion.
Product overview
Technical overview of custom gear rack and pinion.
A custom gear rack and pinion converts rotary input into linear movement or converts linear force back into rotation. The rack behaves like a gear with an infinite pitch diameter, while the pinion determines travel per revolution and available mechanical advantage. ZhongYi reviews rack-and-pinion requirements from drawings or samples, including module, pressure angle, tooth direction, rack length, pitch-line height, mounting holes, joint design, material, heat treatment, straightness, and the matched pinion. Application load, speed, positioning accuracy, lubrication, and mounting stiffness are needed to select a workable manufacturing route.
Product types
Gear Racks and Pinions types and manufacturing paths.
The final product form is confirmed from the buyer drawing, mating component, assembly layout, operating conditions, and inspection requirements.
Helical gear racks
Angled-tooth racks used with compatible helical pinions when smoother engagement or a specific motion design is required.
Hardened or ground racks
Wear-conscious designs where the drawing defines heat treatment, tooth finishing, straightness, and accuracy requirements.
Round, stainless, or plastic racks
Structure- and material-led options for reciprocating layouts, corrosion exposure, light loads, or lubrication restrictions.
Selection guidance
How to specify the correct configuration.
Begin with required linear travel and force. Module, pinion tooth count, and pitch determine movement per pinion revolution, while tooth width, material, and heat treatment influence load capacity. Long axes may require multiple rack sections; the drawing should define end preparation, alignment method, cumulative pitch needs, and mounting-hole relationship to the pitch line. Confirm whether the rack or pinion moves, how backlash is adjusted, whether positioning reverses direction, and how the system is lubricated and protected from chips or dust.
Material Options
- Carbon steel for general linear-motion racks
- Alloy steel for hardened or ground tooth requirements
- Stainless steel where corrosion resistance is specified
- Engineering plastic for selected light-load or low-lubrication systems
Selection Factors
- Module, pressure angle, rack tooth form, and matched pinion
- Total travel, rack length, joining plan, and end machining
- Pitch-line height, mounting holes, datum surface, and straightness
- Load direction, speed, duty cycle, backlash, and positioning accuracy
- Lubrication, contamination, corrosion, and maintenance access
Applications
Gear Racks and Pinions application fit.
Match the gear type with real machinery conditions, operating environment, load, speed, and replacement requirements.
- Industrial automation and positioning axes
- Machine tools, gantries, and handling systems
- Lifting, gate, steering, and guide mechanisms
- Construction and special-purpose machinery
Quality and technical verification
Inspection requirements tied to approved technical data.
Useful engineering evidence is more valuable than unsupported quality claims. Critical checks, records, and acceptance criteria are defined from the drawing and purchase requirement.
Rack performance depends on more than the tooth profile. ZhongYi can review the reference surface, pitch-line height, mounting-hole pattern, joint features, straightness, material, heat treatment, and tooth finishing against the approved drawing. Inspection requirements may include length and hole position, tooth thickness, pitch-related checks, hardness, straightness, and trial alignment with a mating pinion or joining gauge when specified. Installation instructions should keep the mounting distance consistent and prevent long or plastic racks from bending during handling. Final accuracy and documentation are confirmed per order rather than assumed.
All products can be custom manufactured from drawings or samples.
Buyer FAQ
Common technical and purchasing questions.
These answers support early technical review. Final dimensions, materials, tolerances, and process requirements are confirmed against the approved file for each enquiry.
What determines travel per revolution in a rack-and-pinion system?
Travel depends on the pinion pitch geometry. For a standard metric system, module and pinion tooth count determine pitch diameter and linear travel per revolution. Confirm the exact calculation and profile data before releasing the rack and pinion drawings.
How should multiple rack sections be joined?
The mounting base must be straight and stable, and the rack ends need a defined joining and alignment method. Hole position, end pitch, joint gap, and a suitable assembly gauge or reference pinion should be considered in the design.
What information helps control rack backlash?
Provide the mating pinion, mounting distance, center-height adjustment method, direction reversals, load, desired backlash range, and whether the design uses a split, spring-loaded, tapered, or conventional fixed arrangement.
Custom manufacturing
Send drawings or samples for technical review.
ZhongYi can review geometry, material, heat treatment, bore, keyway, tooth profile, application conditions, and order quantity before quoting.
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Send drawings, samples, or technical requirements for review.
Our team can review your gear type, material, heat treatment, tolerance, order quantity, and application conditions before quotation.