Trantorque GT Installation Instructions 
A Trantorque GT Keyless Bushing offers flexible and easy installation while providing exceptional holding power. To ensure a Trantorque GT unit performs as specified, it must be installed properly.
Warning: Use no lubricants in this installation.
1. Shaft and component bore must be within 0.003"(0.08mm) 0.0015"(0.04mm)Mini Series] of stated bore diameter and must have a surface finish of 32-125 Ra (roughness average). If the surface finish is outside these specified values, consult Fenner Drives.
2. Both shaft and component bore must be completely free of paint, grease, oil, and dirt. If necessary, clean the surfaces with a non-petroleum based solvent, such as isopropyl alcohol.
Warning: Do not lubricate the Trantorque GT bushing or shaft. The use of any lubricant on the contact surfaces could result in bushing failure and will void all warranties.
3. Insert the Trantorque GT unit into the component to be mounted, making sure the mating hub is flush against the shoulder at the hex flats.
4. Position the assembly at the desired location on the shaft and hand-tighten the nut (clockwise) until the assembly becomes snug on the shaft.
Warning: Do not hammer or use any type of impact to force the Trantorque GT assembly along the shaft.
 Warning: The shaft must fully engage the shaft gripping area (Figure 1) of the Trantorque GT unit. Figure 2 illustrates minimum shaft engagement.
5. Using a torque wrench, tighten the nut to the proper installation torque. See table for torque value. (Note: Fenner Drives has available crowfoot wrenches for square drives in sizes from 1/2" to 3-1/2".) The hex flats on the outer element are provided for counter-torque, eliminating the need to hold the component or shaft while applying installation torque.
Note: At full installation torque, the assembly will have moved approximately 0.075"(1.9mm)[0.045"(1.1mm)Mini Series] axially along the shaft away from the nut. If axial position is critical it may be necessary to loosen the nut and reposition the assembly.
Warning: Over-tightening the nut could damage the Trantorque GT unit and/or the mounted component.
Do not use an impact wrench in the installation.
Installation Torque on Nut |
| |
Inch Pound System |
Metric System |
Shaft Size |
In. Lbs. |
Shaft size |
N-m |
| Mini Series |
3/16-1/4 |
125 |
5-6mm |
14.1 |
5/16-3/8 |
150 |
7-9mm |
17.0 |
7/16-1/2 |
175 |
10-12mm |
19.8 |
9/16-5/8 |
200 |
14-16mm |
22.6 |
3/4 |
700 |
17mm |
80.0 |
| Standard Series |
5/8-3/4 |
1200 |
15-19mm |
136 |
13/16-1 |
1500 |
20-25mm |
170 |
1-1/16-1-1/4 |
2000 |
28-32mm |
225 |
1-5/16-1-1/2 |
2300 |
34-38mm |
260 |
1-9/16-1-3/4 |
2800 |
40-42mm |
316 |
1-13/16-2 |
4900 |
45-50mm |
554 |
| Large Series |
2-1/16-2-1/4 |
5300 |
55mm |
600 |
2-5/16-2-1/2 |
5600 |
60mm |
635 |
2-9/16-2-3/4 |
6000 |
65-70mm |
680 |
2-13/16-3 |
6600 |
75mm |
750 |
|
WRENCHES FOR INSTALLATION
Fenner Drives offers a complete line of high-quality crowfoot wrenches for installation and to provide counter-torque. These wrenches are much narrower than earlier designs and are specifically for use with Trantorque GT units. It is recommended that both wrenches be used when installing a Trantorque GT unit.
1/2" SQUARE DRIVE |
Shaft Size |
Part Number |
Wrench Style |
Dimensions (inches) |
A |
h |
w |
t |
5/8 to 3/4 |
6202990020 |
C |
1-1/4 |
2.88 |
2.25 |
0.60 |
5/8 to 3/4 |
6202990024U |
U |
1-1/2 |
4.91 |
4.88 |
0.31 |
13/16 to 1 |
6202990024 |
C |
1-1/2 |
3.44 |
2.75 |
0.75 |
13/16 to 1 |
6202990028U |
U |
1-3/4 |
4.94 |
5.13 |
0.38 |
1-1/16 to 1-1/4 |
6202990028 |
C |
1-3/4 |
3.50 |
3.25 |
0.52 |
1-1/16 to 1-1/4 |
6202990032U |
U |
2 |
5.68 |
5.37 |
0.50 |
1-5/16 to 1-1/2 |
6202990032 |
C |
2 |
3.98 |
3.57 |
0.51 |
1-5/16 to 1-1/2 |
6202990038 |
U |
2-3/8 |
5.93 |
5.75 |
0.50 |
3/4" SQUARE DRIVE |
Shaft Size |
Part Number |
Wrench Style |
Dimensions (inches) |
A |
h |
w |
t |
1-9/16 to 1-3/4 |
6202990036 |
G |
2-1/4 |
6.64 |
4.38 |
0.75 |
1-9/16 to 1-3/4 |
6202990042 |
U |
2-5/8 |
6.16 |
6.00 |
0.63 |
1-13/16 to 2 |
6202990040 |
G |
2-1/2 |
6.89 |
4.63 |
0.75 |
1-13/16 to 2 |
6202990046 |
U |
2-7/8 |
6.17 |
6.00 |
0.75 |
2-1/16 to 2-1/4 |
6202990044 |
G |
2-3/4 |
7.20 |
4.34 |
0.75 |
2-1/16 to 2-1/4 |
6202990050 |
U |
3-1/8 |
6.10 |
6.00 |
0.75 |
2-5/16 to 2-1/2 |
6202990048 |
G |
3 |
7.88 |
5.03 |
0.75 |
2-5/16 to 2-1/2 |
6202990054 |
U |
3-3/8 |
8.00 |
8.50 |
0.63 |
2-9/16 to 2-3/4 |
6202990052 |
G |
3-1/4 |
8.57 |
5.72 |
0.75 |
2-9/16 to 2-3/4 |
6202990058 |
U |
3-5/8 |
7.11 |
7.41 |
0.75 |
2-13/16 to 3 |
6202990056 |
G |
3-1/2 |
9.32 |
5.72 |
0.75 |
2-13/16 to 3 |
6202990062 |
U |
3-7/8 |
7.74 |
7.94 |
0.75 |
|
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