Property Repair Systems

01626 331351

Brake Roller Epoxy Coating - for bonding surface friction grits

Coating Brake Rollers - to refinish Brake Rollers used for the testing of vehicle braking systems

Your brake test rollers must provide a certain level of friction to maintain their accuracy. It is therefore important that the rollers are re-surfaced as soon as the friction surface becomes worn.

Thixotropic Epoxy Adhesive has a strong bond, high chemical resistance, is easy to apply, and does not slump or run. It is a no odour, two part epoxy with the consistency of Vaseline.

Available in 400cc or 1000cc packs.

Allow 2 litres per square metre (2mm of resin thickness)

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1. Remove rollers or remove fitting plates to allow full access (depending on type).

2. Strip existing grit with an angle grinder, grit blast or needle gun.

3. Strip the roller surface to bare metal.

4. Clean the roller with a solvent cleaner to ensure no oil or grease remains in the metal.

5. Regrind to eliminate any solvent cleaner smear film.

6. Apply Thixotropic Epoxy Adhesive with a grooved spreader.

7. Apply Grit to the adhesive so that cover is complete, with some excess.

8. Leave to cure for 24 hours, subject to temperatures being above 15 degrees C.

9. Clean and grease the end bearings and re-fit the rollers.

IMPORTANT NOTES

Try to do this job in the Summer months.

In cold weather you must keep the rollers above 5 degrees C. Below 5 degrees the resin curing will slow and curing will be delayed.

On cold, damp days condensation on the rollers can reduce adhesion, so screen off the area to prevent draughts and warm up with heaters in the pit overnight.

In Winter adjust the resin temperature by placing the pots in warm water.

For cleaning, use cellulose thinners, epoxy thinners, or trichlorethylene.

The Rollers MUST NOT BE USED until the coating is really hard. Make a test piece (of metal or wood) when the coating is complete. Coat the test piece, without grit and leave next to the gritted area. Test by first thumb pressure and then with a screwdriver before using. When hard, the coating still continues to gain strength over several days, so build up the work load.

To save grit, make a simple trough out of cardboard. Remove the side plates on Brake Rollers, & fit the 'catcher'.

Thixotropic Epoxy Adhesive

Available in 400cc and 1000cc (1 litre) packs, applied at about 2 litres per square metres.

Supplied in vivid blue and cream - makes mixing easy - when the colour is an even light blue/grey the product is properly mixed.

Roller Area = Diameter of Roller in Metres x 3.142 x Width of the roller in Metres

Example: Diameter 300mm = 0.3 metres, Width 1.5 metres

0.3 x 3.142 x 1.5 = 1.41 square metres x 2 litres per metre = 2.8 litres = 3 packs of 1 litre.

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Hole Repair - cut out the cracks with a masonry grinder to form square edged slots and remove all dust and debris. Pour in Structural Pouring Grout.

For cosmetic matching of colour or texture - you can add your own Site dust or chippings to the surface, or ask for our special Pigment options.

Structural Pouring Grout - available in 1, 2.5 and 8 litre packs, two liquids and a powder.

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Alumac prime quality fused aluminas produced from stringently controlled raw materials form the most durable grit surfaces for Brake Rollers.

Al203 content 94 -99%.

Packed in 5kg and 20kg bags.

Scatter rate - allow 2.5kgs per square metre

Call David on 01626 331351 for calculation of your Brake Roller cleaning and finishing needs.

Discuss the Grades of Grit available to ensure satisfaction.

For further help visit:

www.boron.org.uk - how to use Boron based insecticides/fungicides to treat timber rots and insect attack

www.dampness-info.co.uk - how to treat penetrating dampness in walls and plaster

www.deck-treatment.co.uk - how to treat patio decks and yacht decks

www.dryrot.biz - how to cure and prevent Dry Rot

www.epoxy-info.co.uk - epoxies, polyesters and polyurethanes for all applications

www.joist-repair.co.uk - how to quickly repair joists and beams of any size

www.timber.org.uk - systems of repair, with step by step methods

www.timber-repair.co.uk - how to repair timbers in buildings without wrecking the place

www.propertyrepairsystems.co.uk - fire paints, crack injection, metal fabrication, hygiene treatments

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