Need help about torque wrench

[RX-KING]

Hi guys, new to me about this snap-on torque wrench, model number is QJMR-210A i buy this tool for 10US$ in NOS condition. i don't know about this torque unit, it's use cmkp instead Nm or lbf/ft. anyone know the production date and torque range of this tools. Many thanks for the informations and help. Sorry for my bad ingglish

 

[crasher98]

Never heard of those units so had to look it up. Found this converter website:

https://www.translatorscafe.com/unit-converter/en/energy/42-19/kilopond meter-newton meter/

and this explanation:

https://onlineconversion.vbulletin....nd-calculate/4395-cmkp-to-inch-lbs-conversion

Seems like maybe you have a neat antique (or at least oldish) torque wrench!

 

[crasher98]

This might be a better converter since in units of torque rather than force:

https://www.convert-measurement-units.com/convert+Kilopond-meter+to+Inch-pounds-force.php

Seems like cm-kp is length x force like ft-lbs or in-lbs (opposite of N-m, i.e., force x length). so you can convert from cm-kp to m-kp (or kp-m) and then use the online converter to get to a more familiar set of units.

But that could be all wrong, I'm not too good w/ the metric system. In the end I ususally get to the point of determining that I either need to multiply by 100 or divide by 100, and then I go watch tv or something.

 

[Ole Slewfoot]

I do not believe that wrench is big enough for the proposed conversions to be correct.
What I wold do is set that thing to 1000, hook it up opposite an old beam torque wrench, and see where it clicks.
From 500 or 1000, calculating the ratio for conversion should be easy, and cold be used to discover the size of the unit.

 

[Wamsutta]

cmkp = kilopond centimeters

1 kilopond centimeter = 0.10 kilopond meters

1 newton meter = 10.19716213 kilopond centimeters

1 newton meter = 8.8507461068334 inch pounds

convert newton meters to kilopond centimeters
https://www.bossard.com/da/engineering/fastener-expert-tools/torque-converter.aspx

convert newton meters to inch pounds
https://www.convertunits.com/from/newton+meter/to/inch-pound

.

 

[country83]

I was asking myself "what on earth is a kilopond?" and did a Google search and found this:
https://sizes.com/units/kilopond.htm

Looks like an oldie wrench, but a good one! I'd keep it more as a conversation piece than as an actual usable tool.

 

[RX-KING]

thanks for help. yeah its true nice old snap-on torque wrench.

 

[ricleh]

1 cmkp = .87 inlb

Similar to the current QD2R1000A torque wrench