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4. Parts Requiring Lubrication and Type of Lubricant
x Hitachi Motor grease No. 29
•Spring [41] <37>, Spring [55] <51>
5. Tightening Torques for Fastening Screws and Bolts
• Tapping Screw D4 x 12 (M 12SE) <9>
䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏
2.0 r 0.5 N•m (20 r 5 kgf•cm)
• Tapping Screw D4 x 16 [11] [19] <16>
䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏
2.0 r 0.5 N•m (20 r 5 kgf•cm)
• Tapping Screw (W/Flange) D4 x 20 (Black) [7] <4>
2.0 r 0.5 N•m (20 r 5 kgf•cm)
• Tapping Screw D5 x 50 [60] <56>
䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏
2.9 r 0.5 N•m (30 r 5 kgf•cm)
• Hex. Hd. Tapping Screw D5 x 70 [35] <31>
䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏
2.9 r 0.5 N•m (30 r 5 kgf•cm)
• Machine Screw (W/Washers) M4 x 8 (Black) [47] <43>
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1.8 r 0.4 N•m (18 r 4 kgf•cm)
• Machine Screw (W/Washers) M4 x 12 (Black) [64] <60>
䱏䱏䱏䱏䱏䱏
1.8 r 0.4 N•m (18 r 4 kgf•cm)
• Machine Screw (W/Washers) M6 x 10 [59] <55>
䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏
4.9 r 1.0 N•m (50 r 10 kgf•cm)
• Machine Screw (W/Washers) M6 x 30 (Black) [42] <38>
䱏䱏䱏䱏䱏䱏
4.9 r 1.0 N•m (50 r 10 kgf•cm)
• Seal Lock Flat Hd. Screw M5 x 14 [70] <66>
䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏
3.4 r 0.7 N•m (35 r 7 kgf•cm)
• Hex. Socket Set Screw M5 x 8 [23] <20>
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0.75 r 0.25 N•m (7 r 2.5 kgf•cm)
• Nut M5 (Black) [53] <49>
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3.4 r 0.7 N•m (35 r 7 kgf•cm)
• Screw M8 [51] <47>
䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏
9.8 r 2.0 N•m (100 r 20 kgf•cm)
• Thrust Nut [62] <58>
䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏䱏
17.2 r 2.5 N•m (175 r 26 kgf•cm)
6. Checks after Reassembly
After reassembly, check the following:
(1) Confirm that the Lever [37] <33> and Pushing Button [66] <62> operate smoothly.
7. Insulation Tests
After an overhaul, measure the insulating resistance and test the dielectric strength.
Insulation resistance : More than 7 Mȍ using a DC 500 V megohm tester
Directric strength test : AC 4,000 V applied for one minute, with no abnormalities
220 V to 240 V (110 V for UK products)
AC 3,750 V applied for one minute, with no abnormalities
120 V for USA and Canada products
AC 3,000 V applied for one minute, with no abnormalities
110 V to 127 V (except for UK, USA and Canada products)
8. No-load Current Value
The table below lists the no-load current values measured during no-load operation for 30 minutes.
• M 12VE
Voltage (V) 110 120 127 220 230 240
Current (A) max. 6.8 7.0 7.0 4.2 4.2 4.2
• M 12SE
Voltage (V) 110 127 220 230 240
Current (A) max. 5.5 6.0 3.8 3.7 3.6
9. Product Accuracy
Bit run-out: When a test bar 12 mm in diameter is set, deflection of the bar must be 0.4 mm or less at the
position 100 mm distant from the front end of the chuck.