Contact Rollers

Increase Performance, Increase Productivity & Reduce Abrasive Costs

Contact Rollers In today's wide belt polishing and grinding plants, Menges Roller Company has discovered that the technical parameters of durometer land groove ratios, rubber compound selections, and balance specifications of contact rolls are confusing even to the most experienced technical personnel. Improper selection of contact roll specifications can cost you in production speed, abrasive costs, undesirable stock removal, and poor finishes. We can manufacture a new roll for you as a complete core and covering, or we can recover your existing rolls. It's time to give the experts at Menges Roller Company a chance to show you what our consistent quality can mean to your bottom line.

Some things to consider about contact rollers:

If this was anatomy class, and you had to show us the living heart of your grinding or polishing equipment, you would undoubtedly point to your contact rollers. If we were then asked to show the heart of the contact roller itself, it would be the rubber covering. We have over 30 years of experience matching the best rubber compounds to the harshest environments in the industry today.

Durometers hardness:

Measurement of the hardness of rubber is very important.

SOFT DUROMETERS -
(15-50 Shore A Scale) Roll coverings are used when aggressive stock removal is not of primary concern, but even processing of an irregular surface may be the primary objective or for generating finer finishes.

MEDIUM DUROMETERS -
(60-80 Shore A Scale) These durometers can be used to try and avoid a median between hard and soft durometers. These rolls will achieve good stock removal rates while still conforming to slight irregularities in the contour of the work surface.

HARD DUROMETERS -
(85-95 Shore A Scale) This is used for aggressive stock removal or when precision tolerances are critical.

A guide for figuring land-groove ratios for contact rollers

It is very important to processing that the ratio you choose be perfectly maintained across the entire roll face. Any widening or narrowing of groove or land across the face will produce nightmarish results for the finisher. We can give you the right configuration for your needs.

Land Groove Guide
  • Added Strength
  • Fatigue Resistance
  • Less Breakage
Coil Sheet Plate
1" -L x 1/4"-G x 3/8"-D
15/16"-L x E/16"-G x 5/16"-D
5/8"-L x 5/16"-G x 5/16"-D
3/8"-L x 3/8"-G x 3/8"-D
7/16"-L x 5/16"-G x 5/16"-D
1/2"-L x 3/4"-G x 3/8"-D
Plain Faced 		3/8"-L x 3/8"-G x 1/2"-D
1/2"-L x 3/8"-G x 3/8"-D
3/4"-L x 114"-G x 1/4"-D
1/2"-L x 5/16" G x 5/16"-D
9/16"-L x 3/8"-G x 3/8"-D
5/8"-L x 5/16"-G x 5/16"-D
5/16"-L x 1/4"-G x 5/16"-D
1"-L x 1/4"-G x 1/2"-D
3/4"-L x 1/2"-G x 3/8"-D
Plain Faced 		3/8"-L x 3/8"-G x 3/8"-D
1/2"-L x 1/4"-G x 5/16"-D

Finding the angle of serration or grove.

For proper selection of the angle of serration, stand at either end of the roll and see which direction the grooves are going (from top to bottom). Grooves and serrations that go to the left are left handed, and those going to the right are right handed. The angle of serration should run opposed to the splice in the abrasive belt, minimizing the belt joint area from coming in contact with the land on the contact roll. This will reduce marking of you work, and will ensure a rapid cut rate.

Square Cut
Square Cut
Serrated Contact Roll Grove Design

Radius Cut
Radius Cut
Radius used at Land Root provides:

  1. 1.60 degree of serration is the maximum practical angle. Used for heavy stock removal and where finish marks are of no concern. Belt life will be greatly reduced, but a rapid cut rate is enhanced.
  2. 2.45 degree is a very standard serration for a wide variety of applications. Gives a good stock removal rate and a suitable finish.
  3. 3.30 degree is used where a better finish is needed. It will be less likely to generate marks with reasonable stock removal rates.
  4. No serration (plain faced) is used almost exclusively for polishing and fine finishing, Minimal stock removal

We will finish your job with high-speed 2-plane dynamic balancing.

We will ensure your finished contact rollers balance with our high-speed dynamic balancing machine. More often than not, improper balancing will be the reason for chatter or finishing problems you encounter. Every time your contact roller is recovered and regrooved, the balance can be thrown out of spec. The need for this final balancing is extremely important to a worry free roll. We balance at your operating speed, please specify working RPM when ordering. Contact us for all of your contact roller needs.

Radius used at Land Root provides:

  • Added Strength
  • Fatigue Resistance
  • Less Breakage
Menges Roller Company