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Home / CNC Parts / Rack And Pinion Drive Systems
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Rack and Pinion Drive

$125.00 – $155.00

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SKU: 90500X Category: Rack And Pinion Drive Systems Tag: Rack and Pinion Drive
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Our Rack and Pinion system is a cost-effective way to get the accuracy and performance you need in your CNC application. The system uses a tensioned spring to pull the pinion gear up into the rack teeth. With our system:
  • The pivot interface has 3 bearings instead of a bushing. These bearings plus a lockdown collar system eliminate plate wiggle and keep the pinion riding straight and true on the rack.
  • The universal mounting plate can accept either NEMA 23 or NEMA 34 motors. To convert between size you only need to change the pulley, belt, and drive spindle.
  • The pinion drive gear now uses a ball bearing on the timing gear portion where the belt attaches and a dry run sleeve bearing where the pinion rides on the gear rack. The gear rides on a precision ground stainless steel shaft for smooth motion.
  • A belt tensioning cam allows you to adjust the belt tension without disassembling anything.
  • A high resolution 3:1 belt drive reduction for both NEMA 23 and NEMA 34 motors.
  • Simple spring tension adjustment for gear pre-loading to rack.

What’s in the package

NEMA 23
  • Universal Rack and Pinion drive plate for NEMA 23 or NEMA 34 motors.
    • The triple bearing pivot assembly with the collar lockdown system is pre-installed (Bolt has 3/8-16 mating thread).
    • Double bearing drive spindle. Features a 20 tooth pinion gear and 60 tooth timing pulley (3mm pitch). Comes pre-installed on the plate with a precision ground stainless steel shaft.
    • The belt tensioning cam is pre-installed on the plate.
  • 20 tooth timing pulley for motors with 1/4” or 3/8” bore to match your motors shaft size.
  • 3mm pitch timing belt.
  • Motor mounting screws and nuts (motor not included).
  • Spring pre-load assembly. Includes 2 mounting brackets, spring with tensioning bolt.
NEMA 34
  • Universal Rack and Pinion drive plate for NEMA 23 or NEMA 34 motors.
    • The triple bearing pivot assembly with the collar lockdown system is pre-installed (Bolt has 3/8-16 mating thread).
    • Double bearing drive spindle. Features a 20 tooth pinion gear and 64 tooth timing pulley (5mm pitch). Comes pre-installed on the plate with a precision ground stainless steel shaft.
    • The belt tensioning cam is pre-installed on the plate.
  • 20 tooth timing pulley for motors with 1/2” bore.
  • 5mm pitch timing belt.
  • Motor mounting screws and nuts (motor not included).
  • Spring pre-load assembly. Includes 2 mounting brackets, spring with tensioning bolt.

Product Notes

  • The motor is not included. Use at least a 380 oz-in NEMA 23 motor or 500 oz-in NEMA 34 Motor for better machine performance.
  • The drives mate with our drilled and counterbored gear rack which is available in several sizes. These gear racks are 3/4in thick by 1.25in wide (2.5 times the size of normal gear racks!) and feature drilled mating holes every 4 inches. This configuration gives you much greater stiffness, which leads to longer gear life.
  • This drive is the same drive we use in our Saturn 3 machines. The mounting hole pattern is (2) 3/8-16 tapped holes spaced 6in apart. If you need these to fit onto your machine, give us a call and we can work with you to make sure they are the perfect fit.

CAD files

  • coming soon
Weight 5 lbs
Dimensions 10 × 5 × 5 in

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