Page 6 of catalogue Core drilling system of C & E Fein GmbH

A worthwhile investment– FEIN HM ULTRA Core drill bits
40% more efcient than full Drilling. Core drilling is an extremely efcient process: faster, quieter and more accurate than full drilling. With core drilling, you can successfully achieve large diameters with various thicknesses of material with considerably less power – in signicantly less time. And because there is no need for pre-drilling and tool change, you can work 40% more quickly and therefore more efciently than with full drilling; a core drilling machine achieves in one go what full drilling achieves in four separate steps: centre punching, centring, drilling out and drill nishing. And with the new FEIN HM ULTRA-core drill bits, you can work more economically and efciently: after approx. 40 drillings the FEIN HM ULTRA has already paid for itself!*

Here you have the correct FEIN HM ULTRA core drill bits in the set
FEIN HM ULTRA-core drilling set: Consisting of 4 Quick IN core drill bitsDIA. 18, 32, 40, 50 mm and a centring pin in a plastic carrying case. For KBM 50 Q, 52 U. Order number 6 31 27 092 02 0 FEIN HM ULTRA-core drilling-set: Consisting of4 QuickIN core drill bitsDIA. 14, 18, 22, 32 mm with centring pin in a plastic carrying case. For KBM 32 Q. Order number 6 31 27 088 03 0

FEIN core drill bit comparison
Material AluAluminium minium > 10% Si – ¹ Steel < 500 Steel < 750 Steel < 900 – Steel < 1100 – – Steel < 1200 – – – Hardox/Weldox < 45 HRC – – Emulsion tempered steel, dif cult to cut Stainless steel < 1200 Emulsion tough, hard, rust and acid resistant Ti < 1200 – – – Pneumatic exotic alloy difcult to cut GG(G) < 900 Pneumatic No swarf, brittle, creates crumbs, causes clogging CuZn < 700 – – – Emulsion brittle Brass Bronze Tensile strength in N/mm2 < 10% Si HSS-Co (competition) FEIN HSS PRIMA FEIN HSS DURA FEIN HM FEIN HM ULTRA Lubricant Property ¹

Petroleum, Emulsion Emulsion

Emulsion Emulsion

Emulsion Emulsion

Non-ferrous metal, Universal varieties of steel tough, lubricated, breaks teeth, ¹) Chemical reaction with TiAlN

optimal / suitable / possible / – not suitable/ Non-binding recommendation table * Comparison of core drilling with full drilling: Calculated with drill hole diameter of 32 mm in S 235 steel 20 mm thick, an hourly rate of € 31 and acquisition costs of approx. € 55 (full drill) or € 78 (FEIN HM ULTRA).

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