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For Machines Mfg. Since 8/09
SB1024/SB1025/SB1026
O P E R A T I O N
Setting SB1025/SB1026 Spindle Speed
1.
DISCONNECT MILL FROM POWER!
2.
Remove the belt housing side covers on both
sides of the head to expose the V-belt and
pulleys, as shown in
Figure 35
.
3.
Loosen the two motor lock levers, one on
either side of the head, then pull the belt
tension adjustment lever forward to release
the V-belt tension.
4.
Refer to the illustrations in
Figures 36–37
and position the V-belt on the pulleys for the
desired spindle speed.
Note:
The Models SB1025 and SB1026 produce
slightly different spindle speeds for each
V-belt position. Make sure you refer to the
correct illustration for the mill.
Also, Model SB1025 has two spindle speeds
for each V-belt position that are selected by
using the spindle direction switch on the
control panel.
F1/R1
will produce the lower
of the two speeds for each spindle speed
range and V-belt position.
Figure 36. Model SB1025 V-belt positions and
speeds.
Motor
Spindle
Spindle
Motor
Switch @
F1/R1
SB1025
Low Spindle
Speed Range
Switch @
F2/R2
Motor
Spindle
Spindle
Motor
Switch @
F1/R1
Switch @
F2/R2
80
140
220
325
650
160
280
440
710
1170
1860
2800
1420
2340
3720
5600
SB1025
High Spindle
Speed Range
Figure 35. V-belt and pulleys exposed
(Model SB1026 shown).
Adjustment Lever
Lock Lever
(1 of 2)
V-Belt & Pulley
Access
Summary of Contents for SOUTH BEND LATHE CO.. SB1024
Page 98: ......
