SOVEREIGN TECHNICAL INFORMATION SHEET DIAMOND CUTTING DISCS

Transcription

1 Data Sheet No: TDS 165 Version 2 SOVEREIGN TECHNICAL INFORMATION SHEET DIAMOND CUTTING DISCS The following six types of Diamond Cutting Discs are available and the correct blade should be selected dependent on the type and frequency of application. All Discs (with the exception of the BM5 are suitable for wet and dry use). All discs are double sided laser welded for extra safety. It is imperative that the correct assembly, and application procedures are strictly adhered to for optimum performance and operator safety. BM1 Concrete Middle Segment Disc For regular cutting of all good concrete products, ie. kerbs, slabs, lintels, fence posts, light reinforced concrete areas (will cut through mesh), limestone, aggregate concrete, concrete paviors and occasional use on clay roof tiles. BM2 Asphalt Hard Drop Segment Disc For regular cutting of highly abrasive building materials, ie. asphalt, soft sandstone, green concrete, low-strength concrete blocks such as breezeblocks. BM3 Granite/Hard Brick/Clay Pipes Soft Segment Disc For regular cutting of hard engineering bricks, clay paving blocks, clay pipes, natural stone, granite, silicate stone, marble. Note that for more intricate cutting of marble, granite, ornamental stone or terrazzo a continuous rim disc is best suited (available upon request). BM4 Concrete Block Paving Medium to Hard Segment Disc For regular cutting of highly abrasive concrete block paving as used in most town centres and driveways (nb. not suitable for the harder clay paving blocks), hard ornamental stone (York stone), hard sandstones. Also suitable for occasional use with asphalt over concrete, soft sandstone and breezeblocks. BM5 Ceramics Middle Segment Disc For regular cutting of ceramics, tiles, earthenware, fibreglass reinforced plastic, and occasional use with marble. Continuous rim suitable only for dry use. BM6 Universal Middle Segment Disc For cutting facing bricks, stock bricks, medium hard stone. Also for occasional use on soft slate, limestone, aggregate concrete, concrete slabs and kerbs but with reduced service life. For frequent, prolonged cutting of specific materials other Discs from the range should be selected.

2 Diamond Discs are stocked in the following sizes:- Diameter Bore Types Available 300mm 20.0mm All except ceramic (BM5) 300mm 350mm 25.4mm Asphalt (BM2) only 110mm Ceramic (BM5) only 230mm Granite (BM3) Block paving (BM4) and Universal (BM6) only 115mm 125mm 150mm Universal (BM6) only Please note that other sizes of Disc are available upon request but are not a stock item. TROUBLE SHOOTING Diamond segments have turned blue and knurled on outside edge. Cause Disc overheated, due to too long a period of use without pausing to allow blade to cool. Attempt to re-sharpen disc in abrasive material, eg. corundum/calcium silicate, always use blade correctly, ie. cut for 20 seconds then pause for 10 seconds. Disc core has hairline cracks on the teeth. Disc overheated due to overloading. Disc has been overheated and then hot disc has been placed in water to cool down. Disc is not securely fastened. Never exert excessive force onto disc, the weight of the machine is usually sufficient. Ensure disc is correctly fitted and follow correct procedure for cooling. Break in joint between segment and body of blade, missing segment. Disc has been bent or pressed sideways during cutting process. Blade has cut through metal. Blade has been dropped or damaged. Discs are only suitable for sawing straight, sideways pressure, cutting curves or burring will deform the blade. Ensure blades are handled with care and are disconnected from the machine and suitably protected during transit. Axial oscillation. Machine bearing worn or broke. The backing flange is heavily soiled. The disc is bent due to sidewards pressure. Clean down machine of any soiling, have bearings checked.

3 Disc turning eccentrically. Drive shaft or clamping flange is heavily worn or damaged. Spindle/bore fit is incorrect. Select correct bore fitting and ensure disc is properly fitted before tightening clamping flange. Excessive wear. Disc is not suitable for very abrasive material being cut. Insufficient cooling of the disc (causes heavy stripping of diamonds). Select correct blade for substrate and ensure correct cooling procedure is followed. Torn segments. Cutting speed is too high, selected disc is too hard for material being worked. Select a disc with a softer segment, reduce cutting speed. Disc is not cutting. Disc is blunt due to:- Prolonged use on very hard glazed materials. Excessive machine speed. Too much pressure applied. Incorrect selection. Ensure correct disc has been selected for proposed application, check that wheel diameter and machine speed are compatible. Avoid excessive pressure on material being worked dead weight of the machine is normally sufficient. Attempt to resharpen the disc with a few cuts into an abrasive surface. Torn disc core or loss of tension. Too hard a disc has been selected. Too high a cutting speed. Core is worn. Disc has been overheated. Select disc with softer segment. Ensure material being cut is securely held and move machine slowly and evenly without bending material. Avoid excessive cutting pressure. Follow correct cooling procedure.

4 SAFE AND EFFECTIVE USE OF LASER WELDED DIAMOND BLADES DO clean the flanges before mounting the blade and check both plates are the same diameter. DO ensure that the arrow on the blade corresponds with the direction of rotation of the machine spindle. DO ensure that the blade is in balance and running true. DO ensure that the machine bearings and spindle are not worn or the blade life will be reduced. DO use the blade with a gentle reciprocating motion. DO avoid tilting the blade when cutting. DO use the correct bond for the material to be cut. DO use only machines which have an approved safety guard. DO remove the diamond blade from the machine during transit. DO inspect blades frequently to detect cracks or undercutting of the steel centre and segments, which could lead to segment loss. DO always wear protective goggles, ear defenders, industrial gloves, face masks and correct clothes. DO NOT apply pressure and force your diamond blade through the cut. The weight of the machine will suffice. DO NOT let excessive heat be generated at the blade cutting edge. DO NOT use your blade on metals or other unsuitable material. NB. These blades must be used in accordance with the Abrasive Wheel Regulations 1970 and amendments and the Health and Safety at Work Act.

5 DIAMOND CONCRETE CUTTING DISC SELECTOR CHART Hard Concrete Light Reinforced HARD BRICKS/ GRANITE UNIVERSAL ASPHALT CONCRETE PAVING BLOCKS BM1 BM3 BM6 BM2 BM4 Concrete Concrete Lintels Concrete Paviors Concrete Slabs ** Concrete Kerbs ** Limestone Aggregate ** ** Concrete Clay Roof Tiles ** ** Granite Marble Clay Paviors/Clay Paving Blocks Hard Engineering Bricks Hard Clay Pipes Vitrified Clay Products Hard Facing Bricks Facing Bricks Stock Bricks Soft Slate ** York Stone Hard Ornamental Stone Hard Sandstone Asphalt Over Concrete ** Green Concrete ** Brick Mortar ** Low Strength Concrete ** Blocks Soft Sandstone ** Breeze Blocks ** Asphalt Silica Refractory Products Lignacite Blocks BEST SUITED SUITABLE FOR OCCASIONAL USE ** NOT RECOMMENDED Information given is in good faith based on experience and usage, however all recommendations are made without warranty or guarantee, since the conditions of use are beyond our control. All goods are sold in accordance with our Conditions of Sale, copies of which are available on request. Customers are advised that product, techniques and codes of practice are under constant review and changes occur without notice, please ensure you have the latest updated information. SOVEREIGN Sovereign Chemicals Limited, Park Road, Barrow in Furness, Cumbria. Tel: Fax: Technical Support Line: Web: