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 X-4
TORQUE MULTIPLIERS
(GEARED HEAD WRENCHES)

The X-4 Torque Multiplier is a Geared Head Wrench incomparable to any other tool. The multiplication is achieved through a planetary gear train at a ratio depending on the model. The precision gear train is totally enclosed.

An X-4 is a silent partner to all maintenance men, providing ample power to loosen the toughest threaded fasteners. As a torque multiplier it generates torque's from a few hundred pound-feet to thousands of pound-feet with precision and ease. Relatively small in size, the X-4 Torque Multipliers may be used with practically all accessory tooling yet provide ample wrench power in limited work areas. In many cases it eliminates dismantling of nearby equipment.

In addition to many applications where an X-4's use is mandatory, general use will not only upgrade the quality of work but also vastly improve the overall efficiency of the operators. Safety groups will find many reasons for specifying the use of X-4 Torque Multipliers and rather than interfere with production or efficiency, both factors will show improvement.

In use, standard drive sockets of appropriate size are placed on the male drive square. A suitable drive tool is inserted in the female input socket. This may be an ordinary ratchet drive, a torque measuring device or under controlled conditions, a power drive. This assembly is now placed on the part to be turned with the reaction bar restrained against some substantial part of the equipment being serviced. At this point, any force applied to the input drive is multiplied at the output end of the X-4. For higher ratios of multiplication, two or more X-4's may be directly intercoupled. Impact type driving tools should not be used.

Thousands of X-4 Torque multipliers are in use throughout the world as maintenance, production, inspection or service equipment wherever high torque applications are found.

 

X-4 MULTIPLIERS - DATA AND SPECIFICATIONS

Model Output Capacity Input
Drive
Output
Drive
Ratio* Approx. Wgt.
LW-750 1000 lb-ft
(1356 N-m, 140 kP-m)
1/2" 3/4" 4 to 1 7 lbs
(3.2 kg)
TD-1000 2000 lb-ft
(2712 N-m, 280 kP-m)
3/4" 1" 4 to 1 14 lbs
(6.4 kg)
TD-1000R
(ANTI-BACKLASH)
2000 lb-ft
(2712 N-m, 280 kP-m)
3/4" 1" 4 to 1 15 lbs
(6.9 kg)
TD-1200
(TWO-STAGE)
3000 lb-ft
(4067 N-m, 420 kP-m)
3/4" 1 1/2" 14.3 to 1 30 lbs
(14 kg)
TD-1500 4000 lb-ft
(5423 N-m, 560 kP-m)
1" 1 1/2" 4.33 to 1 30 lbs
(14 kg)
TD-2000 8000 lb-ft
(10847 N-m, 1120 kP-m)
1" 1 1/2" 4.6 to 1 47 lbs
(21 kg)
TD-2500 12000 lb-ft
(16270 N-m, 1680 kP-m)
1" 2 1/2" 6 to 1 73 lbs
(33 kg)

*Due to frictional losses in the tool, actual output will vary between 10 and 20% in each stage of multiplication.

 
Model A B C D E F O/A/L
LW-750 3.50"
89 mm
6.60"
168 mm
.50"
13 mm
.75"
19 mm
3.35"
85 mm
17.8"
452 mm
22.5"
572 mm
TD-1000 3.75"
95 mm
6.60"
168 mm
.75"
19 mm
1.00"
25 mm
4.37"
111 mm
20.4"
518 mm
25.7"
653 mm
TD-1000R
(ANTI-BACKLASH)
3.75"
95 mm
6.60"
168 mm
1.50"
38 mm
1.00"
25 mm
5.00"
127 mm
20.4"
518 mm
25.7"
653 mm
TD-1200
(TWO-STAGE)
5.20"
132 mm
9.70"
246 mm
2.00"
51 mm
1.50"
38 mm
7.00"
178 mm
23.9"
607 mm
30"
762 mm
TD-1500 5.20"
132 mm
9.70"
246 mm
1.00"
25 mm
1.50"
38 mm
6.20"
157 mm
23.9"
607 mm
30"
762 mm
TD-2000 6.50"
165 mm
12.10"
307 mm
.75"
19 mm
1.87"
48 mm
7.67"
195 mm
23.8"
604 mm
31"
787 mm
TD-2500 8.50"
216 mm
11.50"
292 mm
1.00"
25 mm
2.25"
57 mm
7.25"
184 mm
28.7"
729 mm
28.7"
729 mm


X-4 TORQUE MULTIPLIER PARTS DIAGRAM
(FOR ALL MODELS EXCEPT TD-1200)


X-4 TORQUE MULTIPLIER PARTS LISTS
(FOR ALL MODELS EXCEPT TD-1200)

Drawing
Item
Part
Description
Part No.
LW750
Part No.
TD1000
Part No.
TD1000R
Part No.
TD1500
Part No.
TD2000
Part No.
TD2500
1 Input Pinion -02 -02 -02 -02 -02 -02
2 Input "O" Ring   -10 -10 -10 -10 -10
3 Input Carrier -04 -04 -04 -04 -04 -04
4 Dowel Pins (4) -08 (4) -08 (4) -08 (4) -08 (4) -08 (4) -08
5 Housing "O" Ring   (2) -09 (2) -09 (2) -09 (2) -09 (2) -09
7 Input Retainer (1) -07 (2) -07 (2) -07 (2) -07 (4) -07 (2) -07
8 Planet Pinion (4) -03 (4) -03 (4) -03 (4) -03 (4) -03 (4) -03
9 Spacer*   (2) -26 (2) -26      
10 Housing -01 -01 -01 -01 -01 -01
11 Output Stub -05 -05 -05 -05 -05 -05
12 Special Screw (4) -06 (4) -06 (4) -06 (4) -06 (4) -06 (4) -06
20 Pawl     -20      
21 Spring, Pawl*     -21      
22 Sleeve, Pawl     -22      
23 Knob, Ratchet     -23      
24 Screw, Retainer     -24      
25 Assy, Ratchet     -25      
26 Reaction Bar* -16 -16 -16 -16 -16 -16
27 Lube Pack* -17 -17 -17 -17 -17 -17
     * Not Shown in Parts Diagram


X-4 TORQUE MULTIPLIER PARTS DIAGRAM
(MODEL TD-1200)


X-4 TORQUE MULTIPLIER PARTS LIST
(MODEL TD-1200)

Drawing
Item
Part
Description
Part No.
1 Input Pinion -02
2 Input "O" Ring -10
3 Input Carrier -04
4 Dowel Pins (4) -08
5 Housing "O" Ring (2) -09
6 Carrier "O" Ring -27
7 Input Retainer (2) -07
8 Planet Pinion (4) -03
9 Spacer (2) -26
10 Housing -01
11 Output Stub -05
12 Special Screw (4) -06
13 Carrier, 2nd -28
14 Sun Pinion, 2nd -29
15 Planet Pinion, 2nd (4) -30
16 Housing, 2nd -31
17 Dowel, 2nd (4) -32
18 Screw, Coupling (4) -33
19 Screw (4) -34
26 Reaction Bar* -16
27 Lube Pack* -17
     * Not Shown in Parts Diagram


MATHEMATICS OF THE X-4 TORQUE MULTIPLIER

Manual torque multipliers are a speed reducing "transmission" to increase the torque force applied by the user.

Torque multipliers have a mechanical gear ratio which indicates the number of turns of the input tool to achieve one turn of the output. A so-called 4 to 1 multiplier, therefore, means that one turn of the input will result in 1/4 turn of the output; four input rotations will result in one output turn.

This does not mean, however, that "force" is similarly multiplied. All multipliers have losses (inefficiency) which must be recognized in estimating the resultant force transmitted.

In X-4 tools that inefficiency will range between 10% and 20%; 15% is a reasonable mid-range estimate to use.

A 4 to 1 multiplier with a 15% inefficiency results in a 3.4 to 1 actual force transmission. Larger multipliers may have greater "pure" ratios; be sure to use this information in calculating your "net" ratio.

By using 3.4 in your calculations you will be within 5% with the result.


Example:

  • Output required 1500 lb.ft.
  • "Pure" ratio 4 to 1
  • Inefficiency 15%
  • "Net" ratio 3.4 to 1
  • 1500-3.4 = 441 lb.ft. of input

NOTE: If the user is interested in achieving a minimum torque and doesn't care if the fastener is slightly over-torqued, use a 3.2 ratio. If the user wants to be sure he doesn't over torque and doesn't care if the fastener is slightly under-torqued use a 3.6 ratio. For exact (2%) readings use an output torqmeter.