3.9X Torque Multipliers | McMaster-Carr

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Maximum Output Torque

1,000 ft·lbf

2,400 ft·lbf

Output Square Drive Size

3/4"

Maximum Torque

Less than 1,000 ft·lbf

1,000 ft·lbf to 1,999 ft·lbf

2,000 ft·lbf to 2,999 ft·lbf

Torque Multiplication

Input Square Drive Size

Maximum Torque Input

Clockwise Accuracy

Counterclockwise Accuracy

±7.5%

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

Gender

Length

Overall Width

REACH

RoHS

Thickness

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Width

Overall Length

Tool Type

4 Products

Low-Profile Torque Multipliers

Get the force of a standard torque multiplier without the bulk. These multipliers are less than 2" high, so they fit where you have limited clearance above a fastener. Use them to apply more torque than your wrench can deliver on its own. Internal gears multiply the amount of force (or torque) that can be applied to the fastener. To avoid exceeding the maximum input torque, pair these multipliers with a torque wrench.

Torque Multiplication—To determine torque output, use the torque multiplication factor. For example, if the torque multiplication factor is 3.9X and you apply 100 ft.-lbs. of torque, the torque output would be 390 ft.-lbs.

Bracing Arms—You can also attach a bracing arm (sold separately) to absorb the backlash after the fastener is tight. Accuracy is rated on the torque output.

	Multipliers														Bracing Arms
		Input Square Drive			Output Square Drive			Accuracy		Overall
	Torque Multiplication	Size	Gender	Max. Torque Input, ft·lbf	Size	Gender	Max. Output Torque, ft·lbf	Clockwise	Counterclockwise	Lg.	Wd.	Thk.		Each		Each
For Hand Tools



		3.9X	1/2"	Female	250	3/4"	Male	1,000	±7.5%	±7.5%	8 3/4"	2 3/4"	1 1/4"	9591N111	000000000	9591N112	0000000


		3.9X	3/4"	Female	600	1"	Male	2,400	±7.5%	±7.5%	12 1/8"	3 3/4"	1 3/4"	9591N113	00000000	9591N114	000000