Helical Rack For The Woodworking Industry

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Gear Rack For the Woodworking Industry

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A helical rack is a type of gear that consists of a rack and a pinion that is used to transform rotational motion into linear motion. These gears are commonly found in cars and are also popular in industrial settings such as lift trucks and power shovels.

A rack and pinion have teeth that are meshed together to create a right angle to its length, making them effective in transforming rotary input into a linear output. This is most commonly accomplished through the application of rotational motion to a circular pinion gear that is engaged by the rack’s teeth.

There are three basic types of rack and pinion gear sets straight tooth, helical, or spur gears. Each has its own advantages and drawbacks, but generally, helical or spur gears offer greater efficiency and are quieter to operate than their straight-tooth counterparts.

Helical Rack Specification:

Model Number: BHGS3-10
Module Number: M 1.5-M4
Tooth Hardness: 50-55HRC
Material: 40CROMU4
Surface Treatment: Gringding, Carburizing, hardening and tempering, nitriding, high-frequency treatment, black of oxidation, zincing, nickelate.
Standard: ISO, DIN, ANSI, JIS, BS, and Non-standard.
Precision Grade: DIN 6h 25
Toothed Portion Shape: helical
Teeth Angle: 20°
Right-Hand Angle: 19°31’42”
Treatment of Tooth: Gringding
Heat Treatment: Tooth surface induction hardened
Length: 1000mm
Pitch Error/1000mm: 0.021
Application: CNC Machining, CNC Turning, CNC Milling
Tooth Number: 150
Production Process: Four sides finishing mill
Certification: ISO9001:2008, SGS, CCC, CE
Transport Package: Export Wooden Case
Delivery Time: 10-25 for Samples;30-35 for Batch Goods

Pitch Deviation Of Helical Rack:

The pitch deviation of the helical rack is the algebraic difference between the actual pitch and the theoretical pitch. The deviation value is positive when the actual pitch is larger than the theoretical pitch, and negative when it is smaller than the theoretical pitch. This difference is mainly caused by the difference in load distribution coefficient and meshing stiffness at the first contact point of the gear pair.

A helical rack is defined as a gear whose axial cross-section is tangent to the pitch circle at the cross-section of the gear. This shaft is a common reference point, allowing the gear centers to be properly spaced when the two gears are assembled. In gear systems, tangent pitch circles are also used as a reference when calculating the transmission ratio using the pitch diameter of a gear.

Pitch deviation is a major problem of helical gear. This is because the pitch of the gear may vary depending on how the teeth are cut during manufacturing. This is because the tool’s shape diameter is not always aligned with the tooth tip and can reduce the active contour area of the tooth, which can lead to contact loss between the involute lines of the fitness gear.

Pitch Diameter Of Helical Rack:

The pitch diameter of a helical rack is the number of teeth in the gear divided by the diametral pitch. Pitch diameter is usually specified in inches or millimeters; in the latter case, it is called a module.

A helical gear tooth’s geometry is defined by the basic rack or cutting tool, addendum, dedendum, and profile shift coefficients. The tool tip radius is also included, although this input parameter is often more directly associated with the manufacturing process.

Besides the module, the other parameters that define the geometry of helical gear teeth are the normal pressure angle and helix angle. These are the most common and can be easily derived from a transverse section of a gear.

Two helical gears must have compatible base pitches for their involute teeth to mesh properly. If a mating gear involute does not have the same base pitch as the other, there may be an uneven load share on certain teeth which may lead to amplitude-modulated vibrations or noise.


We are one of china’s best helical rack and pinion cnc manufacturers. We can offer a wide variety of helical rack and pinion designs and different helical rack sizes. We also can provide helical rack and pinion calculations. We have exported our products to clients around the world and earned a good reputation because of our superior product quality and after-sales service. We warmly welcome customers both at home and abroad to contact us to negotiate business, exchange information, and cooperate with us!
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Helical Rack and Pinion Vs Ball Screw

Ball screws can swing and vibrate over longer lengths as they hang between the ends. The spiral rack is mounted directly on the precision-machined steel frame/resting on the machined ledges and therefore does not vibrate. Helical rack and pinion drives offer our customers the best of both worlds – high precision, minimal wear for long-term reliability, no vibration, high speed and easy maintenance.

Ball screws can become a place of maintenance issues – as the ball nut rotates and moves along the ball screw, any dirt, dust and debris on the screw can collect inside the ball nut and affect the circulating ball bearing (see example picture for correct). If not cleaned regularly and correctly, ball bearings will begin to wear and stick, leading to problems in the operation of the machine.

We recommend helical rack and pinion drives for better long-term performance and easier maintenance. If the pinion wears out, it is easier and cheaper to replace than expensive ball nuts.

Helical Rack and Pinion CNC

Our in-house engineering talent has extensive expertise in motion control and is always committed to providing unmatched precision, efficiency and versatility to hobbyists and shopkeepers alike. Whatever your goals, we are committed to helping you achieve outstanding results with very little labor and cost.


Here are some of the reasons why this revolutionary CNC technology can be developed and produced:

Experienced in-house engineering talent

The ability to manufacture and test designs entirely on site

Be able to internally put designs into production


We have an unparalleled series of CNC milling machines and CNC plasma cutting machines to experience the true nature of CNC.

Helical Rack and Pinion Application

Woodworking Machine,CNC Router, High-speed Metal Cutting Machine,Pick and Place Robot,Assembly Machine,Material Handing Machine,Packaging Machine,Automaton Gantry,MachineTool,Lift Mechanisms,X-Y Axis Table,Guide Echanism,Seventh-Axis Robotic Slide.

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