19
en
Switching the gear setting
(figure 14).
With the gear switch, you can select the
speed and thus the torque.
Adjust the gear setting only when the
machine is at a complete stop or when the
motor is running down.
Set the switch to gear 1 to work at low speed
with high torque. This setting is suitable for
drilling with large drill bit diameters and for
tapping.
Set the switch to gear 2 to work at high speed
with low torque. This setting is suitable for
drilling with small drill bit diameters.
Fig.14
Drilling capacity
in steel - TCT
(core drill bit)
Drilling capacity
in steel - high speed
steel (HSS)
(core drill bit)
Drilling capacity
in steel - high speed
steel (HSS)
(twist drill bit)
Tapped hole
KBM 50 U,
KBM 50 Q,
KBM 50 auto
1. Gear
27 – 50 mm
1 1/16 in – 2 in
21 – 40 mm
3/16 in – 1 5/8 in
16 mm – 23 mm
5/8 in – 7/8 in
M6 – M16
1/4 in – 5/8 in
KBM 65 U
1. Gear
27 – 65 mm
1 1/16 in – 2 5/8 in
21 – 45 mm
1 1/16 in – 1 3/16 in
16 – 25 mm
5/8 in – 1 in
M6 – M20
1/4 in – 6/8 in
KBM 50 U,
KBM 50 Q,
KBM 50 auto
2. Gear
12 – 26 mm
7/16 in – 1 1/16in
12 – 20 mm
7/16 in – 3/4 in
1,5 – 15 mm
1/16 in – 5/8 in
-
KBM 65 U
2. Gear
12 – 26 mm
7/16 in – 1 1/16in
12 – 20 mm
7/16 in – 3/4 in
1,5 – 15 mm
1/16 in – 5/8 in
-
Max. diameter
for reaming
Max. diameter for
counterboring
KBM 50 Q
1. Gear
≤ 16 mm
≤ 5/8 in
≤ 31 mm
≤ 1 3/4 in
KBM 50 U,
KBM 50 auto
1. Gear
≤ 23 mm
≤ 7/8 in
≤ 50 mm
≤ 2 in
KBM 65 U
1. Gear
≤ 25 mm
≤ 1 in
≤ 50 mm
≤ 2 in
OBJ_BUCH-0000000142-002.book Page 19 Monday, November 18, 2013 11:13 AM
