GE GEH-5304A - page 18

GEH-5304A

Table 7

Bolt Tightening Torque Values

Hex Head (C1C5) Gr ade 5

Medium Car bon Steel

Thr ead Sizes (Without Lubricant)

(UNC-2A) Lb-Ft N-m

1/4-20 7-9 10-12

5/16-18 13-17 18-23

3/8-16 24-30 33-40

1/2-13 60-75 80-100

5/8-11 120-150 160-200

3/4-10 210-260 280-350

For l ubri cated bolts, use 65% of value sh own in Table 7.

L. Accessory Mounting

Provisions for mounting accessories on the commutator endshield is a standard feature. The rabbet has

NEMA type C-Face mounting dimensions, including the mounting bolt holes. The standard stub shaft also

permits coupling certain accessories.

To prevent injury from the rotating shaft, the stub shaft cover must be main-

Standard accessories are available as kits. These include a variety of tachometers, speed limit switches and

brakes. A mounting adapter, which can be machined for various accessor ies, can be ordered separately.

M. Brakes

Flange mounted brakes may be mounted on the accessory rabbet. Since the accessory stub shaft is not suit-

able for use with a brake, the standar d NEMA commutator end shaft extension should be ordered when such

use is plann ed. Standar d brakes are designed for horizontal floor mounting only. When motors are sidewall

or ceiling mounted, the brake must be reassembled to maintain its relation to the horizontal. Where motors

are to be mounted with the shaft greater than 15° from the horizontal, special brakes should be specified.

N. Inspection After S tarting

The followin g items should be checked after th e machin e is runnin g:

1. Bearings

Ball bearing or roller bearing housing temperature should be no more than 80°C (176°F). Excessive

bearing temperature may be caused by misalignment or improper greasing (Refer to Alignment and

Bearing Maintenance sections.)