Integral Drill Steels

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Top hammer drilling tools

This integral drill steel is suitable to drill holes with a small diameter. Given that this drill steel’s head is equipped with tungsten carbide, it can drill rocks with no need to be connected with tapered drill bits. This is why this integral drill steel is an ideal alternative to tapered rods and tapered chisel bits.

22mm（7/8’’）Integral Drill Steel	Model	L		D
22mm（7/8’’）Integral Drill Steel	Model	mm	Foot/inch	mm	inch
	11	800 1600 2400 3200 4000 4800 5600 6400 7200	2’ 7 1/2’’ 5’ 3’’ 7’ 10 1/2’’ 10’ 6’’ 13’ 1 1/2’’ 15’ 9’’ 18’ 4 1/2’’ 21’ 23’ 7 1/2’’	34 33 32 31 30 29 28 27 26	1 11/32 1 5/16 1 1/4 1 7/32 1 3/16 1 5/32 1 1/8 1 1/16 1 1/32
	12	400 800 1600 2400 3200 4000 4800 5600 6400	1’ 3 3/4’’ 2’ 7 1/2’’ 5’ 3’’ 7’ 10 1/2’’ 10’ 6’’ 13’ 1 1/2’’ 15’ 9’’ 18’ 4 1/2’’ 21’	41 40 39 38 37 36 35 34 33	1 9/16 1 17/32 1 1/2 1 15/32 1 13/32 1 3/8 1 11/32 1 5/16 1 1/4
	13	800 1200 1600 2000	2’ 7 1/2’’ 3’ 11 1/4’’ 5’ 3’’ 6’ 6 3/4’’	33 32 31 30	1 5/16 1 1/4 1 7/32 1 3/16
	16	1200 1800 2400	3’ 11 1/4’’ 5’ 10 7/8’’ 7’ 10 1/2’’	34 33 32	1 11/32 1 5/16 1 1/4
	17	1200 1600 2000	3’ 11 1/4’’ 5’ 3’’ 6’ 6 3/4’’	40 39 38	1 9/16 1 17/32 1 1/2