DIN 172/ISO 4247

Type A:
Bore rounded at one end.
Manufactured of special steel,
hardened, ground to tolerance inside and outside, with lead-in chamfer.

Type B:
Bore rounded at both ends.

Hardness: HRC 62 +2

Ordering Example for a drill bush with collar, type A with d1 = 10 mm und L = 12 mm:
Drill bush with collar DIN 179 A 10 x 12

Bore d1 F7				d2 n6	d3	L2	short L	Euros ea.	medium L	Euros ea.	long L	Euros ea.
from	0,6			3	6	2	6	14,50	-	-	-	-
from	0,7	to	0,8	3	6	2	6	10,50	-	-	-	-
from	0,9	to	1,0	3	6	2	6	7,75	9	8,44	-	-
from	1,1	to	1,8	4	7	2	6	4,90	9	5,57	-	-
from	1,9	to	2,6	5	8	2	6	2,36	9	2,49	-	-
from	2,7	to	3,3	6	9	2,5	8	2,39	12	2,57	16	4,32
from	3,4	to	4,0	7	10	2,5	8	2,47	12	2,60	16	4,14
from	4,1	to	5,0	8	11	2,5	8	2,57	12	2,72	16	4,37
from	5,1	to	6,0	10	13	3	10	2,60	16	2,89	20	4,71
from	6,1	to	8,0	12	15	3	10	2,98	16	3,21	20	4,88
from	8,1	to	10,0	15	18	3	12	3,21	20	3,59	25	5,68
from	10,1	to	12,0	18	22	4	12	3,59	20	4,05	25	6,13
from	12,1	to	15,0	22	26	4	16	4,23	28	5,44	36	8,31
from	15,1	to	18,0	26	30	4	16	4,98	28	6,65	36	8,61
from	18,1	to	22,0	30	34	5	20	6,65	36	6,65	45	11,79
from	22,1	to	26,0	35	39	5	20	8,38	36	10,66	45	14,20
from	26,1	to	30,0	42	46	5	25	10,78	45	12,95	56	24,92
from	30,1	to	35,0	48	52	5	25	13,14	45	16,62	56	31,16
Über 35,0 on inquiry

Increment of the bore d1 = 0,1 mm up to 15.0 and 0.5 mm over 15.0.
Intermediate sizes are available at extra cost.

Type B (bore rounded at both ends) = 10% extra