Newly Re-designed P-Series Gearbox improves Backlash, Corrosion Resistance and Center Distance between Input and Outputs! 

NEMA Flange Low Backlash Gearboxes

Ondrives.US offers PF-NM and PFA-NM worm gear designs in a range of torque values with various input/output sizes to match your requirements. Like all our gearboxes, these units are engineered for low backlash (≤30 arc minutes backlash or less) and high efficiency (up to 90% at 1,000 RPM).

Contact us for more information regarding our NEMA Flange Mounted Gearboxes or request a quote today. See individual product listings for additional information and specifications.


NEMA Flange Mounted Gearbox Specifications

Our NEMA gearboxes are built-in compact frames and provide an output that is 90° from the input. Along with reduction ratios from 5:1 to 120:1 and optional single- and double-output shafts, PF-NM and PFA-NM model worm gear designs are versatile enough for various applications. Durable aluminum and steel materials make these worm reduction gearboxes ideal for harsh working conditions. See individual product listings for full NEMA reduction gearbox design specifications and Dimensional Parametric Search.

NEMA Flange Mounted Gearbox Design Update

As part of our commitment to existing product improvement, Ondrives.US is revising the design of our P, PF, and PF-NM gearbox models. These design changes will improve quality and consistency and eliminate the requirement for the eccentric output design of the low (-A) and further reduced (-AR) backlash versions. Potential improvements over previous models include:
  • More consistent center distances
  • Smoother and quieter running
  • Reduced environmental impact
The external dimensions of the gearboxes, including casting size, input shaft and output bore sizes, and mounting hole positions and diameters will not be affected. However, the gearboxes will look visually different, the large black steel output mounting is replaced with a stainless steel mount.

Custom NEMA Flange Gearboxes Manufactured to Your Exact Specifications

At Ondrives.US, we can assist with designs, modifications, prototypes, and complete production of custom drive components and gears for any application. If your project specifications require custom mechanical components, our engineering team can produce parts and components that match your drawings and meet your performance needs.

The Ondrives.US Advantage:

Ondrives.US has over 40 years of experience with reduction gearbox design and manufacturing. Our dependable, high-performance power transfer solutions are available in numerous sizes and configurations, with torque ratings up to 420Nm to meet our customers’ requirements. Our PF-NM and PFA-NM series NEMA flange gear reducers are ideal for many applications.
  • NEMA 17 and NEMA 23 inputs available
  • Standard reduction ratios from 5:1 to 120:1
  • Custom reduction ratios available
  • Low backlash—as low as ≤4 arc minutes backlash
  • High-efficiency worm gear reducers—as much as 90% at 1,000 RPM
  • Solid aluminum casings; steel interior mechanisms
  • Single- or double-ended output shafts (purchase separately)
  • Optional single- and double-output shafts
  • 90° output angle
  • Greased for life
  • Custom worm gear design available

Order NEMA Flange Mounted Gearboxes Today

Ondrives.US quality surpasses the competition! Order the NEMA flange worm reduction gearbox you need, request a quote, or contact us for more information.