Diamond Blades

Within Portable Power Tools Consumables, Diamond Blades covers the diamond-tipped cutting blades used with portable angle grinders, cut-off saws, and similar power tools to cut stone, concrete, masonry, tile, granite, and other hard abrasive materials. Parts For Machines supplies trade-grade diamond blades across the standard angle-grinder and cut-off saw diameters. Diamond blades work by friction-cutting — diamond-impregnated segments on the rim of a steel disc abrade through the workpiece, with the diamonds gradually wearing as the bond matrix releases them. Match the bond hardness to the material: hard bonds for soft, abrasive materials (sandstone, soft brick); softer bonds for hard, non-abrasive materials (granite, hard tile). Wrong bond glazes the blade and stops cutting. Common configurations:

• Continuous-rim blades: smooth cutting edge; for tile, marble, and porcelain — clean cuts in finishing applications

• Segmented blades: gapped cutting edge; for general masonry, concrete, and stone — fast cutting, heat dissipation

• Turbo blades: small wave segments; the general-purpose compromise — workable across most masonry and stone • Diamond core bits (separate sub-section): hollow diamond drills for boring through concrete and masonry Diameter sizes typically run from 100mm and 115mm (small angle-grinder size) through 125mm, 180mm, and 230mm (large angle-grinder size), with arbor bores standardised at 22.23mm (7/8 inch) for the angle-grinder market. Parts For Machines is an Authorised Distributor and Seller of Draper, SIP, and Sealey across diamond blades. Product pages list diameter, arbor bore, segment height (typical new blade segments 7-12mm; replace when segments wear below 2mm), maximum operating speed (in RPM — must exceed your tool's spindle speed), and the rated material the blade is designed to cut. Trade pricing on bulk and case-pack orders is available; contact the team via WhatsApp 07754288583 for a quote on volume requirements.

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FAQs

For tile cutting (ceramic, porcelain, marble, granite), use a continuous-rim diamond blade — the smooth edge gives clean cuts without chipping the tile face. Wet cutting (with a tile-saw water feed) extends blade life significantly on porcelain and granite. For general masonry, concrete, and brick, use a segmented diamond blade — the gapped segments allow heat to dissipate during dry cutting and remove dust from the cut. For mixed work where one blade has to handle both, a turbo (wave-segmented) blade is the compromise.

Two signs: the diamond segments wear down to the steel core (when segments are below roughly 2mm remaining height, replace the blade), or the blade glazes and stops cutting. Glazing happens when the bond is too hard for the material — dress the blade by cutting a soft, abrasive material (soft brick, dressing stone) for a few seconds to expose fresh diamond. If glazing recurs immediately, the bond doesn't match the material and a different bond hardness is needed. Cracked or chipped blades should be replaced immediately — never use a damaged blade.

The blade's maximum operating RPM (stamped on the steel core) must exceed your tool's spindle speed — never use a blade rated below the tool's RPM. As a guide: 100mm and 115mm diamond blades are typically rated 13,500 RPM (covering most small angle grinders); 230mm blades are typically rated 6,650 RPM (covering large angle grinders). Cut-off saws (petrol-engined disc cutters) run at higher RPM and require blades rated specifically for cut-off saw use — check the tool's rated spindle speed against the blade's RPM rating before fitting.

Most masonry and concrete diamond blades are rated for dry cutting in short bursts, with cooling intervals between cuts to prevent overheating. Continuous-rim tile-cutting blades typically require water cooling for clean cuts on porcelain and granite — the water acts as both coolant and dust suppressant. The product page lists whether each blade is rated for dry cutting, wet cutting, or both. Wet cutting always extends blade life and improves cut quality on hard materials.

Returns are accepted within 30 days of purchase, in original packaging, on orders delivered within the United Kingdom. For damaged-on-arrival items, report within 24 hours with photographs to [email protected] — we will typically arrange collection and replacement at no cost to you. For parts that don't fit your machine, the Fit Guarantee covers a hassle-free return at no cost. For buyer's remorse — you've changed your mind or ordered the wrong item, email us first to obtain a Return Merchandise Number; a restocking fee may apply. Refunds are issued to the original payment method once the return is inspected.

Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and 'Check where we deliver' confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.

Diamond Blades

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Which diamond blade type do I need for cutting tile versus general masonry?

How do I know when a diamond blade is worn out?

What RPM rating do I need on a diamond blade?

Can I use a diamond blade dry, or does it need water cooling?

What if the part doesn't fit or arrives damaged?

How quickly will I get my order and where do you deliver?

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