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. Please note that 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.
X-4 Tool Perf-A-Torq Torque Limiters are produced in a wide array of custom configurations engineered specifically to satisfy distinct customer requirements. Contact us with details related to your application and we will determine how to best resolve your precision torque limiting challenge.
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.
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.
Male & Female
|Torque Limit (Min)||Torque Limit (Max)||Nominal Outside
|"A" Dim.||"B" Dim.||Weight|
|38A||3/8"||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|
|38B||3/8"||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|
|12A||1/2"||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|
|12B||1/2"||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|
|12D||1/2"||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|
|12E||1/2"||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|