SDS & Core Drilling Resources
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Choose the right tungsten carbide grade for SDS-Plus and SDS-Max drill bits. Compare YG8, YG8C and YG11C, cobalt content, coarse grain, HRA/TRS specs, 2-cutter, 4-cutter, solid-tip carbide heads and OEM quality checks.
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Practical troubleshooting for SDS drill bits that jam, snap, wear flat, get shorter, or stick in concrete. Diagnose rebar, packed dust, wrong drill mode, side load and heat, then remove the bit safely and choose the right 2-cutter, 4-cutter, FCH or rebar cutter.
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The 3-cutter (120 degrees) full carbide head SDS-Plus hammer drill bit: one-piece sintered carbide head, Ø3-20 mm, that drills concrete and punches steel deck plate without a bit change. Geometry, carbide grade, the seam-free weld, and how it fits beside 2-cutter, 4-cutter and full-head SDS-Plus.
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Both are one-piece full carbide head SDS-Plus bits — so the choice is the grind: 3-cutter (Y, 120 degrees) or 4-cutter (cross). 4-cutter drills rounder, more precise anchor holes and is fastest in clean concrete; 3-cutter self-centers and shears through rebar. When to pick each.
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A clear, brand-agnostic comparison of the two large-hole masonry coring tools on an SDS-Max shank — the one-piece multi-flute Core Cutter and the hollow TCT core bit (wall hole cutter). How each removes material, a material-fit matrix, and which to specify for concrete, brick, cavity walls and stone.
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Why a premium 2-cutter SDS hammer bit has a self-centering carbide tip, a pointed centre that drives straight and a multi-zone flute — when the fast 2-cutter beats a 4-cutter, and what separates a premium 2-cutter from a commodity one.
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A procurement-focused guide to DIN 8039 and ISO 5468 masonry drill bit standards: straight-shank scope, diameter dimensions, SDS limitations, PGM difference, and RFQ wording for importers.
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A brand-agnostic selection guide for cutting gray and ductile cast iron — sprue, gate, and riser removal on foundry deburring lines. Diamond grit vs abrasive wheel vs carbide cold saw, the bore and OD that gate the order, grit by speed-vs-finish, bond by gray-vs-ductile, segmented vs continuous edge, dry vs wet, and the line economics that decide unit cost. With a tool comparison table and an RFQ checklist.
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Diamond is metastable carbon — in contact with iron above ~700°C it graphitizes and its carbon diffuses into the iron, so a diamond edge dies almost instantly on plain steel. Cast iron is the ferrous exception: it is carbon-saturated with free graphite, so diamond-grit blades genuinely cut it. The materials science behind it, why CBN is the superabrasive for steel, how a grit-edge cast-iron blade is built, and how to spec one for foundry sprue and gate cutting.
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The engineering guide to drilling 32 mm blast holes with hand-held SDS-Max rotary hammers in small-scale and artisanal mining: electric vs pneumatic jackleg economics, hole-to-cartridge sizing, bit head geometry for rock, wear modes, retirement criteria and cost per metre.
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A buyer's shortlist of the top bush hammer and bushing bit manufacturers: the premium programs from Hilti, Bosch, Makita, DeWalt, Milwaukee, Tyrolit, and Diablo, plus the factory-direct OEM route across all four shank families — with pin-count, carbide, and brazing criteria for qualifying a supplier.
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A buyer's shortlist of the top masonry drill bit manufacturers: the premium brands that set the spec — Bosch, Hilti, Makita, Heller, DeWalt — and the direct-from-factory OEM route for private-label programs, plus carbide grade, tip geometry, and brazing criteria for qualifying a supplier.
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