Emerson 3000 Bolt Minimum Shaft Key, Gear Clearance Mounting Connection Frame Length, Max

1.4Mounting Configuration with Bushing on Load

Side of Reducer and Using Stabilizer Ring

	H
J	K
	Bushing Ring
	Bushing
Endcap
	Driven
Dirt	Shaft
	Driven
Cover
	Shaft Keyseat
Stabilizer	MC
Ring

Figure 1-4

Table 1-4  Dimensions for Mounting Configuration with Bushing on Load Side of Reducer and Using Stabilizer Ring

	Bolt	Minimum	Minimum
		Shaft	Key	Max.
Gear	Clearance	Mounting	Connection
Frame		Length	Length
	MC	H	K	J
31	1.50	9.11	2.88	4.73
32	1.75	10.54	4.38	4.28
331	1.75	10.47	4.38	4.21
33A	1.88	12.23	4.63	5.83
34	1.88	12.51	4.63	6.01
35	1.88	13.13	5.63	5.62
36	1.88	17.50	6.13	9.49
37	2.25	19.76	7.38	10.13
38	2.75	19.05	7.38	7.74

1This design is replaced by 33A design effective Jan. 2010

1.4.1  For Type 1 bushings which require an external key and a shaft key:  Install the key (supplied with the bushing) in the external keyseat of the bushing as shown in Figure 1-1.  Install the shaft key (not supplied) in the shaft keyseat and retain to prevent movement. Install the bushing onto the shaft, flanged end first, align the bushing keyway with the shaft key and position the bushing over the key.

Note:  Key length must be sufficient to engage the full length of the bushing. The shaft must engage the full length of the bushing.

1.4.2  For Type 2 bushings which require one through key: Install the bushing on the shaft, flanged end first. Align the keyway in the bushing with the keyseat in the shaft and install the shaft key. Position the shaft key flush against the inside flange surface of the bushing. See Figure 1-2 Shaft Key and Bushing Location.

Note:  There are three (3) series of bushing keys used in the Type

2 bushing system: rectangular, square and offset. In most cases, the key supplied will be rectangular or offset. Use caution when installing rectangular keys as some may visually appear square. The key should install in the bushing keyway with a sliding type fit. The key in the driven shaft keyseat should be retained to prevent movement.

Note:  The shaft must be engaged the full length of the bushing.

1.4.3  On the side where the driven shaft enters, thread the bushing ring onto the hollow quill until the bushing ring is flush with the end of the hollow shaft. Rotate the gear unit input to align the keyway in the hollow quill with the bushing/shaft key. Position the reducer on the shaft with the bushing ring toward the bushing.

1.4.4  Slide the stabilizer ring onto the driven shaft with the small end of the taper toward the reducer. Insert the stabilizer ring into the quill.

1.4.5  Thread the end cap and the dirt cover (not used if driven shaft extends beyond the end of the hollow quill) onto the hollow quill until hand tight. Do not tighten the end cap.

1.4.6  Rotate the bushing ring clockwise until the tapped holes align with the drilled holes in the bushing flange. Prior to tightening the cap screws, make sure the bushing key is as close as possible to the inside flange of the bushing as shown in Figure 1-2 and the bushing is positioned on the shaft as required in Figure 1-4.  Dimensions for rear mounting configuration with the stabilizer ring.

1.4.7  Install the bushing cap screws and tighten all the cap screws evenly around the bushing flange to the required torque.  See bolt torque specifications Table 1.2.5.

1.4.8  Tighten the end cap again until hand tight.  Tighten the setscrews to the recommended torque. See bolt torque specifications Table 1.2.5.

WARNING!  The cap screws must thread into the bushing ring and not the bushing.  Threaded holes in the bushing are for removal only. If assembled incorrectly,  equipment failure and personal injury may result.

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