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Turbine Grinding Workholding

Our customer designs and sells grinding and super abrasive machining systems specifically for a variety of applications and industries. 

Brief

The operation is to grind the outer diameter of the turbine’s fins, to ensure ultra-accurate clearance within the turbo housing, due to its efficiency requirements. 

Challenge

The work holding chuck needs to hold the long shaft of this turbine and to grip the grooved diameter underneath its head. 

Grinding Turbine Custom Chuck
Custom Turbine Grinding Chuck with Part

Solution

Our solution is a  5” Diaphragm Chuck (Northfield DPH-500) Especially customized. In addition, to the brief the chuck has a spring-loaded carbide center, down in the bore of the chuck. This initially centers the part upon loading. 

Do you want to know more or have a similar challenge of your own. Get in touch with the team 

Contact Northfield – Northfield 

Or call: (516) 431-1112 

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The Top Brass – Custom Brass Top Tooling

Brief

A CNC and process automation customer required custom work holding solution for Grinding the outer diameter of their unique sapphire rods.  

Challenge

The main challenge for the Northfield team is holding the rods well enough without damaging them or creating micro fractures in the material. Additionally, delivering the trademark repeatability and accuracy. 

Custom Workholding Total Indicator Reading
Brass Work Holding – Total Indicator Reading

Solution

The work holding solution is a Northfield model DPH-400, with custom Brass Work Holding Jaws. The top tooling consists of three parts.  

  1. Hardened and ground sub jaws  
  2. A separate center button stop 
  3. Precision ground brass inserts mounted to the sub jaws 

This setup ensures accuracy and repeatability whilst grinding the outer diameter to the required size. 

Custom Brass Jaws Chuck
Custom Brass Jaws Chuck

The use of brass answers the customers need to hold their unique sapphire rod without damaging it. Brass chuck jaws prevent sliding and are very corrosion resistance, meaning there are also tough enough to operate in a grinding environment. 

 

Do you work with delicate or uncommon material? Get in touch and see how Northfield can support you. 

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Plastic Tooling - Ceramic Grinding

Brief & Challenge:

Our customer manufactures delicate ceramic rings. They need a way to carefully hold them on the outer diameter so they can grind the inner diameter. To protect the parts, they requested no metal contact points.

Custom_Ceramic_Grinding_Chuck

Solution:

We produced a 6” Diaphragm Chuck with non-metallic top tooling in contact with the customer’s part. The top tooling is made from the most abrasion-resistant plastic available and these items are easily replaceable for new ones should a future need arise.

Northfield Precision Instrument Corporation is a leader in developing custom solutions for difficult problems. Click here to get in touch.

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Custom Automotive Diaphragm Chuck - Plastic Top Tooling

Northfield 3-jaw, 5” Diaphragm Chuck (DPH-500) with custom plastic top tooling
Northfield 3-jaw, 5” Diaphragm Chuck (DPH-500) with custom plastic top tooling

Customer Brief

Our customer is a heavy duty fuel pump and injector systems manufacturer. They requested a method to accurately grip their small (.098” OD) fuel injector plungers without marking them.

Challenge

Chuck close up, with part and custom stop.

The tip of their part must rest in a carbide seat, ground central to the chuck. This requires the special part stop.

Northfield Solution

Northfield 3-jaw, 5” Diaphragm Chuck (DPH-500) with custom plastic top tooling, disassembled view with part.

The jaws are made from a special, highly abrasion-resistant, engineered plastic. Designed to withstand repeated clamping with minimum wear. The bore diameter gripping the part yields an accuracy and repeatability of more than 50millionths” TIR total runout to the chuck’s center line.

Do you have a similar part? Then get in touch and see how we can 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/