Chapman Tool Torque Chart and Torque Conversion Calculator

See Chapman torque charts below to see our tool’s average working and breaking torques.

SAE Allen Hex

Part Number Approximate Working Torque Approximate Breaking Torque Recommended Tools
.050" 5" lb 6.5" lb Finger or spinner pressure
1/16" 9.5" lb 12.5" lb Finger or spinner pressure
5/64" 20" lb 25" lb Screwdriver handle pressure
3/32" 36" lb 43" lb Screwdriver handle pressure
7/64" 57" lb 68" lb Ratchet or screwdriver handle pressure
1/8" 86" lb 100" lb Ratchet or screwdriver handle pressure
9/64" 125" lb 145" lb Ratchet or screwdriver handle pressure
5/32"* 170" lb 200" lb Ratchet or screwdriver handle pressure
3/16"* 180" lb 200" lb Ratchet or screwdriver handle pressure
7/32"* 180" lb 200" lb Ratchet or screwdriver handle pressure
1/4"*  180" lb 200" lb Ratchet or screwdriver handle pressure
5/16"* 180" lb 200" lb Ratchet or screwdriver handle pressure

 *Actual working/breaking torque of these bits exceeds that of our ratchet and handle. We do not recommend exceeding this torque, as it will cause damage to your tools.


Metric Hex

Part Number Approximate Working Torque Approximate Breaking Torque Recommended Tool
1.5mm 5" lb 6.5" lb Finger or spinner pressure
2mm 20" lb 25" lb Screwdriver handle pressure
2.5mm 36" lb 43" lb Screwdriver handle pressure
3mm 57" lb 

68" lb

Ratchet or screwdriver handle pressure
4mm 125" lb 145" lb Ratchet or screwdriver handle pressure
4.5mm* 180" lb 200" lb Ratchet or screwdriver handle pressure
5mm* 180" lb 200" lb Ratchet or screwdriver handle pressure
5.5mm* 180" lb 200" lb Ratchet or screwdriver handle pressure
6mm* 180" lb 200" lb Ratchet or screwdriver handle pressure
7mm* 180" lb 200" lb Ratchet or screwdriver handle pressure
8mm* 180" lb 200" lb Ratchet or screwdriver handle pressure

  *Actual working/breaking torque of these bits exceeds that of our ratchet and handle. We do not recommend exceeding this torque, as it will cause damage to your tools.

Slotted

Part Number Approximate Working Torque Approximate Breaking Torque Recommended Tool
88 15" lb 17" lb Finger or spinner pressure
89 16" lb 18" lb Finger or spinner pressure
90 17" lb 19" lb Finger or spinner pressure
91 180" lb 200" lb Ratchet or screwdriver handle pressure
92 17" lb 19" lb Finger or spinner pressure
25 45" lb 50" lb Screwdriver handle pressure
26 67" lb 75" lb Ratchet or screwdriver handle pressure
93 67" lb 75" lb Ratchet or screwdriver handle pressure
17 94" lb 105" lb Ratchet or screwdriver handle pressure
95 103" lb 115" lb Ratchet or screwdriver handle pressure
96 135" lb 150" lb Ratchet or screwdriver handle pressure
97 99" lb 110" lb Ratchet or screwdriver handle pressure
98 144" lb 160" lb Ratchet or screwdriver handle pressure
19 180" lb 200" lb Ratchet or screwdriver handle pressure

 

Phillips

Part Number Approximate Working Torque Approximate Breaking Torque Recommended Tool
P1 25" lb 30" lb Screwdriver handle pressure
P2 60" lb 65" lb Ratchet or screwdriver handle pressure
P3 160" lb 200" lb Ratchet or screwdriver handle pressure
P4* 180" 200" lb Ratchet or screwdriver handle pressure

  *Actual working/breaking torque of these bits exceeds that of our ratchet and handle. We do not recommend exceeding this torque, as it will cause damage to your tools.

Star

Part Number Approximate Working Torque Approximate Breaking Torque Recommended Tool
S6 5" lb 6.5" lb Finger or spinner pressure
S8 12" lb 16" lb Finger or spinner pressure
S10 20" lb 45" lb Screwdriver handle pressure
S15 34" lb 68" lb Screwdriver handle pressure
S20 56" lb 108" lb Ratchet or screwdriver handle pressure
S25 84" lb 168" lb Ratchet or screwdriver handle pressure
S30 166" lb 200" lb Ratchet or screwdriver handle pressure
S40 180" lb 200" lb Ratchet or screwdriver handle pressure

 

 

Part Number Approximate Working Torque Approximate Breaking Torque Recommended Tool

24

(Socket adapter)

180" lb 200"lb Ratchet or screwdriver handle pressure

 

This torque conversion calculator can help you convert inch pounds to Newton millimeters.

Pound/Inch

N/mm

1 pound/inch                         

0.17513 N/mm                             

5 pound/inch

0.87563 N/mm

10 pound/inch

1.75127 N/mm

15 pound/inch

2.62690 N/mm

20 pound/inch

3.50254 N/mm

25 pound/inch

4.37817 N/mm

30 pound/inch

5.25381 N/mm

35 pound/inch

6.12943 N/mm

40 pound/inch

7.00507 N/mm

45 pound/inch

7.88070 N/mm

50 pound/inch

8.75634 N/mm

55 pound/inch

9.63197 N/mm

60 pound/inch

10.50761 N/mm

65 pound/inch

11.38324 N/mm

70 pound/inch

12.25887 N/mm

75 pound/inch

13.13451 N/mm

80 pound/inch

14.01014 N/mm

85 pound/inch

14.88578 N/mm

90 pound/inch

15.76141 N/mm

95 pound/inch

16.63704 N/mm

100 pound/inch

17.51268 N/mm

105 pound/inch

18.38831 N/mm

110 pound/inch

19.26395 N/mm

115 pound/inch

20.13958 N/mm

120 pound/inch

21.01522 N/mm

125 pound/inch

21.89085 N/mm

130 pound/inch

22.76648 N/mm

135 pound/inch

23.64212 N/mm

140 pound/inch

24.51775 N/mm

145 pound/inch

25.39339 N/mm

150 pound/inch

26.26902 N/mm

155 pound/inch

27.14465 N/mm

160 pound/inch

28.02029 N/mm

165 pound/inch

28.89592 N/mm

170 pound/inch

29.77156 N/mm

175 pound/inch

30.64719 N/mm

180 pound/inch

31.52283 N/mm

185 pound/inch

32.39846 N/mm

190 pound/inch

33.27409 N/mm

195 pound/inch

34.14973 N/mm

200 pound/inch

35.02536 N/mm

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