Tightening Torque; Insulation Test; No-Load Current Value - Hitachi SB 10S2 Technical Data And Service Manual

9-5. Tightening Torque

Tapping Screw (W/Flange) D4 x 16 ................................................................ 2.0
Tapping Screw (W/Flange) D4 x 30 ................................................................ 2.0
Tapping Screw (W/Flange) D5 x 45 ................................................................ 2.9
Hex. Hd. Tapping Screw D5 x 55 .................................................................... 2.9
Machine Screw M4 x 10 ................................................................................. 1.8
Machine Screw (W/Washer) M4 x 12 ............................................................. 1.8
Machine Screw M4 x 14 ................................................................................. 1.8
Machine Screw (W/Washer) M3.5 x 6 ............................................................ 0.6
Pulley (A) left-handed thread M8 .................................................................... 8.5
Pulley (B) M8 .................................................................................................. 8.5
Brush Cap ....................................................................................................... 0.49 to 1.47 N

9-6. Insulation Test

On completion of disassembly and repair, measure the insulation resistance and conduct the insulation test
(dielectric strength test).
Insulation resistance: 7 M Ω or higher with DC 500 V megohm tester
Dielectric strength:
No flasheover or breakdown shall occur during the test.

9-7. No-load Current Value

After no-load operation for 30 minutes, the no-load current value should be as follows at a frequency of 50/60 Hz.
Voltage (V)
Current (A) max.
Note: The sanding belt should be installed and the dial should be set to "5" for no-load operation.
AC 4,000 V for 1 minute .................... 220 V --- 240 V (and 110 V for the U.K. products)
AC 3,750 V for 1 minute .................... 120 V for the U.S.A. and Canada products
AC 3,000 V for 1 minute .................... 110 V --- 127 V
110 120
5.4 5.0
(except for the U.K., U.S.A. and Canada products)
220 230
2.8 2.9
--- 14 ---
0.5 N m (20
•
0.5 N m (20
•
0.5 N m (30
•
0.5 N m (30
•
0.4 N m (18
•
0.4 N m (18
•
0.4 N m (18
•
0.15 N m (6
•
1.5 N m (85
•
1.5 N m (85
•
m (5 to 15 kgf
•
240
2.8
5 kgf cm)
•
5 kgf cm)
•
5 kgf cm)
•
5 kgf cm)
•
4 kgf cm)
•
4 kgf cm)
•
4 kgf cm)
•
1.5 kgf cm)
•
15 kgf cm)
•
15 kgf cm)
•
cm)
•