OEM NEMA 34 Series

Description

Product Table

Part #	Ratio	Continuous Output Torque			Gearhead Inertia at input (lb-in-sec²⁾
Part #	Ratio	@ 1500 rpm input (in-lbs)	@ 3500 rpm input (in-lbs)	@ 5000 rpm input (in-lbs)	Gearhead Inertia at input (lb-in-sec²⁾
Single Stage
GH34SP004	4:1	529	350	279	1.28x10^-4
GH34SP007	7:1	467	355	301	7.65x10^-5
GH34SP010	10:1	384	313	275	6.69x10^-5
Double Stage
GH34SP016	16:1	667	566	508	1.27x10^-4
GH34SP028	28:1	670	639	595	7.63x10^-5
GH34SP049	49:1	528	499	480	7.55x10^-5
GH34SP070	70:1	534	514	499	6.64x10^-5
GH34SP100	100:1	409	398	391	6.63x10^-5

NOTE: Please see the Axial Load tab for load specifications. PEAK TORQUE: 15% above continuous rating.

WARNING: Repeated peak torque loading may cause failure and will void the warranty.

NOTE: When using with SM34165DT and SM34165MT series motors: All gearheads above come standard with 3/8 inch diameter input shaft. For gearheads requiring a 0.5 inch shaft input, please add "-0.5" to the part number. Example: GH34P3-0.5 will provide a 0.5 inch input shaft diameter.

Mounting Instruction

Gearhead Mounting Instructions

The following items are included with your gearhead:

- 1 pinion	- 1 to 2 hex wrenches
- 1 key	- 4 mounting screws
- 1 feeler gauge (optional)

Summary:

Following the step by step directions below you will clamp the pinion to the motor shaft, then fasten the gearhead to the motor.

Steps:

Remove the pinion or plug from the gearheads' input seal
Place the motor on a level surface if possible.
Insert the pinion onto the motor shaft. Space it according to the value "A" listed in the Table 1. See figure 1.
Tighten the pinions' clamping screws to the specifications listed in Table 2.
Pick up the gearhead and very slowly and carefully insert it onto the pinion.

Important
Keep the gearhead centered and parallel with the motor output shaft while assembling the gearhead to the motor.
Note: It may be difficult to get the gear teeth to line up and slip into place. DO NOT move the gearhead radially back and forth. If you are having difficulty sliding the gearhead onto the pinion, try turning the gearheads' output shaft back and forth. Keep the gearhead centered and parallel with the motors' output shaft.

Insert the gearhead mounting screws, but do not tighten (Loctite is recommended). With the mounting screws loose turn the gearheads' output shaft. This helps the pinion center itself within the gearhead. Five to ten revolutions should be enough.
Tighten down the mounting screws to the specifications listed in Table 2.

Table 1

Dimension "A"	Tolerance
2.01	+/- 0.025

Figure 1

Table 2

screw size (alloy steel)	recommended screw torque (in-lbs)	tolerance +/- (in-lbs)
4	15	3
6	25	5
8	45	10
10	66	13
1/4	115	15
5/16	175	20
3/8	250	25

NOTE: Specifications are subject to changes without notice.

Download the Gearheads specifications