Guides
What is gear module and how do you measure it?
Module is the basic figure that defines tooth size. Here is how to work out the module of the gear in your hand with a caliper, step by step.
Racks and pinions
A toothed bar (rack) and pinion gear that convert rotary motion into linear motion.
What are racks and pinions used for?
A rack is a straight bar with teeth cut into it, working with a small gear called a pinion. The pinion's rotation becomes linear motion along the rack (or the other way round). They are used where rigid, repeatable linear motion over long distances is needed.
Where are they used?
- Axes of CNC routers and plasma and laser cutting machines
- Sliding gate and barrier systems
- Lifting platforms and elevator mechanisms
- Automation and handling systems
- Steering mechanisms
Production details
For a rack quote we need the module, length, cross-section (width × height) and whether the teeth are straight or helical. On long axes several racks are joined end to end; in that case end machining and mounting holes are important. The pinion is made with the same module as the rack.
Questions about Racks and pinions
How are racks joined for a long axis?
The rack ends are machined so that the tooth pitch continues across the joint. Tell us the total length and mounting method and we will plan how to split the parts.
Can I have only the pinion made?
Yes. Just give us the module and tooth type of your existing rack. If you're not sure, add a photo of the rack next to a ruler.
Do you make sliding gate racks?
Yes. You can request a quote for racks in non-standard sizes or other materials.
Which machines do we make this gear for?
Material, heat treatment and tolerances depend on the machine the part runs in. Open your own sector to see the parts we make most often.
Other gear types
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Spur gears
The most common gear type: teeth parallel to the axis, transmitting motion and power between parallel shafts.
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Helical gears
Gears with teeth cut at an angle to the axis, running more quietly and carrying higher loads than spur gears.
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Bevel gears
Cone-shaped gears that transmit motion between intersecting shafts, usually at 90°.
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Worm and worm wheel
A screw and gear pair that reduces speed at a high ratio in a single stage between non-intersecting, perpendicular shafts.
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Timing pulleys
Toothed pulleys that transmit synchronous motion with a toothed belt, without slipping.
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Sprockets
Gears with teeth cut to the chain pitch, transmitting motion and power with a roller chain.
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Couplings
A connecting element that joins two shafts to transmit torque while tolerating misalignment.
Guides about this gear
Articles on the measurement, material and manufacturing decisions to make before you order.
Send a drawing or photo of your part
Quotes are free. We reply with price and lead time within 24 hours.