Products

X4 Perf-A-Torq Torque Limiters

X-4 TOOL Perf-A-Torq™ Precision Torque Limiters

X-4 Tool Perf-A-Torq precision torque limiters convert any standard ratchet or socket drive tool to a torque limiting wrench.

  • Perf-A-Torq™ precision torque limiters can be attached to any standard drive tool to provide the ultimate in torque control.
  • Once the torque limit is set, The X-4 Tool Perf-A-Torq Torque Limiter prevents the applied force from exceeding the setting.
  • When the preset torque value is reached the torque limiter releases with an audible ‘click’.
  • Perf-A-Torq torque limiters may also be used in automated applications at speeds lower than 300RPM.

NOTE: Perf-A-Torq limiters are NOT recommended for use with impact type driving tools.

X-4 Tool Perf-A-Torq Torque Limiters are available in four standard sizes for use with 3/8" and 1/2" standard square drive tools.

Perf-A-Torq limiters combine compactness and a unique resettable torque limit design to maintain precise torque control and accurate repeatability in any application where precision control is a necessity.

Special Applications - Custom Configurations

X-4 Tool Perf-A-Torq Torque Limiters are produced in a wide array of custom configurations engineered specifically to satisfy distinct customer requirements. 

  • X-4 Tool Perf-A-Torq™ Torque Limiters are ideal for use in a wide variety of applications where precise torque control is required.
  • The unit's low cost makes it an ideal tool for repetitive assembly and production line torquing procedures.
  • Snaps onto any standard 3/8” or 1/2” square driving tool.
  • X-4 Tool Perf-A-Torq Torque Limiters release with an audible ‘click’ when the preset torque limit is reached.
  • Patented torque setting mechanism and locking feature insures precision control and repeatability.
  • One-way limiters are available that release in one direction and lock in the other.
  • Torque limits can be set either by the user or preset by the factory.
  • Compact design allows Perf-A-Torq limiters to be used in areas where accessibility is restricted.
  • High quality components and construction ensure durability.
  • Six standard models are available for immediate delivery for torque capacities ranging from 24 to 1440 inch pounds (2 to 120 ft-lbs).
  • Can be set for metric torque measuring and control.
  • All X-4 Tool Torque Limiters are 100% MADE IN THE USA

X-4 Limiters - Data and Specifications

Where possible, select a Perf-A-Torq™ model that meets the expected torque demands at approximately midrange.

  • Example: For torque values around 420 inch pounds, select model 12B with a range of 240 to 600 in-lbs, and midrange of 420 in-lbs

Model No.Drive Sq.
 Male & Female
Torque
Limit
 (Min)
Torque
Limit
 (Max)
Nominal
Outside
 Diameter
"A"
 Dim.
"B"
 Dim.
Weight
38A3/8"24 in-lb
2.7 N-m
180 in-lb
20.3 N-m
1.6"
41 mm
1.7"
43 mm
2.2"
56 mm
12.5 oz
354 g
38B3/8"60 in-lb
6.8 N-m
300 in-lb
33.9 N-m
1.6"
41 mm
1.7"
43 mm
2.2"
56 mm
12.5 oz
354 g
12A1/2"120 in-lb
13.6 N-m
480 in-lb
54.2 N-m
1.7"
43 mm
1.9"
48 mm
2.7"
69 mm
17.5 oz
496 g
12B1/2"240 in-lb
27.1 N-m
600 in-lb
67.8 N-m
1.7"
43 mm
1.9"
48 mm
2.7"
69 mm
17.5 oz
496 g
12D1/2"480 in-lb
54.2 N-m
900 in-lb
101.7 N-m
2.2"
56 mm
1.9"
48 mm
2.7"
69 mm
1 lb 6oz
624 g
12E1/2"720 in-lb
81.4 N-m
1440 in-lb
162.7 N-m
3.0"
76 mm
2.0"
51 mm
2.9"
74 mm
3 lb
1.4 kg

Contact us with details related to your application and we will determine how to best resolve your precision torque limiting challenge.