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Finishing Output Gears

Our customer works mainly in the Automotive and Manufacturing industries. We want to share with you a custom precision solution for output gears we created for them.

Custom Quick Change Jaws - Northfield Sliding Air Chuck
Northfield 650 Sliding Air Chuck – Custom Quick Change Jaws

I discussed this our senior applications engineer Mitchell to get his insights on the project. First of all Mitch please tell us about the brief from the customer?

Brief:

Our customer manufactures output gears and needs to grip the inner diameter of a family of transmission input/output gears for finish turning.

That sounds like an interesting project and not an easy one to solve. What are the main challenges with this brief?

Challenge:

The first main challenge is working with a variety of part sizes. The loading process also needs to take place quickly without swapping the complete chuck during the process. The additional challenge is including enough clearance from the chuck for cutting the parts internally to the required depth.

That’s a lot to work with, how did you solve this and what did you deliver to the customer?

Solution:

The idea behind our design is a “quick-change” style. To handle the different sized parts, subjaws are permanently mounted to the chuck’s master jaws. The Quick-Change top jaws are held in place with a single bolt. It passes through a keyhole slot in each jaw pad. Each jaw segment only has one fastening bolt, meaning no locating pins.

A 3-legged universal Axial Locator is also mounted to the face of the chuck. All parts fit to this without changeover, saving time and reducing errors when switching between parts.

Thank you for that great wrap-up Mitch. How can our readers contact you for any challenging workholding projects they may have?

Sure, You can simply head to the Contact Northfield page on our website or give us a call (516) 431-1112.

The team is always happy to help.

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Pitch-line Gear Chucks

Introducing the series of pneumatic actuated pitch-line gear chucks.

 

Helical Gear Chuck
Helical Gear Chuck

Spur Gear Chuck
Spur Gear Chuck

How can we help you?

These two chucks are 7-inch diaphragm chucks. For multiple gear sizes, chucks can be provided with interchangeable cages and top jaws.

How do we do it?

We attach a custom designed axial locator cage to a standard chuck. This contains a series of floating gage pins in a flexible mounting. Then, we load the gear over the pins into the chuck. The jaws clamp over the pins to center and grip the gear providing a “best fit” centerline of the pitch diameter.

 

Pitch line gear chucks can be provided in sizes from 3-inch to 12-inch diameter, sliding jaw or diaphragm models and can be applied to spur or helical gear applications.

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Custom Diaphragm Chuck for milling precision gears

Every week exciting new projects are heading out the door, such as this Custom Diaphragm Chuck for milling precision gears.

Brief:

The customers work piece is a small precision gear that requires milling on one face, timed to existing geometry.

Challenge:

The outer diameter of this gear shouldn’t be touched, gripping is only possible on the root diameter.

Solution:

Northfield DPH-400 (.00050” T.I.R.) 4” diameter diaphragm chuck was provided, with sub jaws, changeable inserts and stops for different sized work pieces.

  •  Wire cut inserts clear the major diameter and clamp on the root diameter.
  • Changeable stop pads have timing pins, to orient the work pieces prior to clamping.
  • The base stop has a ground indicating band for initial setup.
  • The chuck’s ‘pull-back clamping’ action ensures the part sits flat.

 

Don’t forget you can also follow our most recent projects on LinkedIn.

 

Do you have a unique working holding requirement? Then get in touch now. Our sales team are always available to answer your questions. https://www.northfield.com/contact/