Rubber Rings with Clamping Grooves

  • Nitrile (Buna N) for superior oil and stretch resistance

  • 3 different hardnesses

  • 10 different colors

  • Lead times to meet your needs

Description ]     [ Types ]     [ Ordering Information ]     [ Common Questions ]     [ Technical Advice ]


Nordic custom manufactures Rubber Rings with Clamping Grooves to suit your specific requirements.

  • Nordic Rubber Rings with Clamping Grooves are manufactured from a time tested and field proven proprietary nitrile formula. There is no one else who has this recipe. Our material is engineered to resist damage from oil, to retain its size and shape and resists stretching, and can be maintained by grinding.
  • We can also offer Rubber Rings with Clamping Grooves with fiber reinforcement to help maintain fit for demanding applications.
  • We provide different types of fit for the ID of the rings to the spacers.  Beside the most common request of snug fit, we can also make them tight, slip or loose.  See Ordering Requirements for more information.
  • We can provide vibrant colors which are easily identifiable when dirty and in low light.
  • We have 30 years of experience of solutions to your technical problems and advice  for proper use and care of Rubber Rings with Clamping Grooves.


  • Male and Female Configuration
  • Unbonded or Bonded to your spacers
  • Single Durometer
  • Dual Durometer
  • Proprietary fiber reinforced rings
  • Hub and clamp rings (sheet slitter or slear rings)
  • Mandrel Expanders (Filler Rings)

Ordering Information

Information Required for Quotes and Orders

1. Outside Diameter

For specific recommendations on knife diameter to rubber diameter, please contact us.

2. Inside Diameter

Should match the OD size of your metal spacers. We will automagically adjust the fit to your requested type of fit (see box at right). We have to know the actual OD of your spacers in order to properly manufacture your rings.

3. Durometer Hardness

Choose from 60, 70 or 80 Shore A.

4. Color

You can choose any one of our vibrant colors.

5. Quantities of Each Thickness

Thickness should be the spacer widths. Please don't add or subtract clearances.

Standard Tolerances

OD: +0.010/-0.010"

ID: Snug fit (most common),
but we can make tight fit, slip fit or loose fit too

Thickness: +0.010/-0.030"

Common Questions

I get confused on differences between Buna N, Nitrile, neoprene, and neapolitan?

Rubber is rubber.  What’s the big deal?

How long do rubber stripper rings last?

How often should I grind my stripper rings?

What durometer rings are best?

That depends on a number of factors, but the most important is the thickness of the material that you are cutting. But, here’s a hint.  Harder durometer shouldn’t be used for hard to cut materials. We see that mistake a lot.  Why don’t you email  or call to discuss.  Yes, we answer the phone.

Dual durometer stripper rings are the best? Right? Right?

How thick should the inner layer be on dual durometer?

What about triple durometer?

I need rubber rings with a clamping groove.

What is standard when it comes to hardness, fit, OD relationships, etc?

Technical Advice

Grinding Stripper Rings

  • You need a special grinding wheel dedicated for grinding rubber rings
  • Rubber is abrasive, so imagine grinding one grinding wheel with another
  • Heat is a problem because rubber is an insulator and the heat doesn’t get wicked away like with metal.
  • Heat is a problem because heat causes the diameter to increase
  • It’s difficult to keep rubber rings from spinning (they aren’t keyed)
  • The dang things move out of the way when the grinding wheel presses against them.

Diameter relationship of knives and rubbers

Keeping rings snug

Bonded rubber rings