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Old 11-08-2014, 04:49   #1
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Torque Wrench Recommendations?

I'm looking to replace my antique (circa 2000) torque wrenches so I can baby my Yanmar 4JH2E after her upcoming rebuild. The manual gives settings ranging 32.5-90 foot/pounds, but Larry Berlin gave me a much lower number in inch-pounds for the nozzle retainers way back in 2000 at the Engine City diesel school. I currently have two Husky manual wrenches, one with a ft/#scale and a smaller one for inch/#s. Any one familiar with what's on the market now? One high-quality, accurate (digital?) wrench to cover the entire scale?
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Old 11-08-2014, 05:52   #2
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Re: Torque wrench recommendations?

Since a Ft/Pound is 12 times as high a torque as an Inch/Pound; I suspect you're asking for a higher range than is practicable.
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Old 11-08-2014, 06:30   #3
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Re: Torque wrench recommendations?

Your going to need two, I would suggest as I assume this will be infrequently used, deflecting beam torque wrenches. Deflecting beams are usually the most inexpensive, very accurate if used correctly and arguably don't need calibration.
The fancy digital ones are finicky, easily damaged and aren't anymore accurate, but they are more likely to lose calibration and more likely to be found not working than a deflecting beam.
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Old 11-08-2014, 06:42   #4
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Re: Torque wrench recommendations?

I wonder why you think you need new ones. A circa 2000 torque wrench is "antique"!?! I have a torque wrench that I bought back in the late 70s. Just had its calibration checked last year and it was spot on. I expect to still be using it 20 years from now.
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Old 11-08-2014, 06:46   #5
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Re: Torque wrench recommendations?

As an automotive engineer- 2000 is not old if it is not old unless the tools have been damaged. There should be no reason to replace them. Use the money toward other things the boat needs.
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Old 11-08-2014, 06:49   #6
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Re: Torque wrench recommendations?

Ruh, Roh...

I've had my click type torque wrenches since A&P school circa 1979...

Same with my Snap-On box end wrench graduation giftset. 35 years and no scratches dings, dents or corrosion - these things a freakin' bullet proof.
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Old 11-08-2014, 07:46   #7
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Re: Torque wrench recommendations?

Digital torque wrench is overkill. Torque settings have quite a large tolerance due to stiction and friction. Tension to an angle or stretch is much more accurate and will be a manufacturers recommendation. Being consistent in lubrication or not is key. Ensuring threads, studs and washers are clean and burr free is crucial.

The old deflection torque wrenchs hold their calibration better than click type.

I have two snapon click types that I've had for 20 years. My little inpd trans torque wrench is an old deflection beam. I keep them all calibrated. They will last my lifetime.

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Old 11-08-2014, 17:00   #8
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Re: Torque wrench recommendations?

Thanks to all. Appears I should get my deflection beam set calibrated and keep 'em.
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Old 11-08-2014, 18:49   #9
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Re: Torque wrench recommendations?

No real issue with deflection beam wrenches but of course I like the click type for consistency. If one is careful one can get repeatable torques (say a series of head bolts) but I like the satisfying click that ensures each bolt is exactly the same...
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Old 11-08-2014, 20:04   #10
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Re: Torque wrench recommendations?

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Originally Posted by Ex-Calif View Post
No real issue with deflection beam wrenches but of course I like the click type for consistency. If one is careful one can get repeatable torques (say a series of head bolts) but I like the satisfying click that ensures each bolt is exactly the same...
Hmm, do you really think they are all the same? A fastener with lube on on it has a different torque than a dry fastener. So are your bolts and threads clean? The only way to have them all be "exactly the same", is to measure their length. Otherwise you are only getting it close.
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Old 12-08-2014, 05:58   #11
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Re: Torque wrench recommendations?

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Hmm, do you really think they are all the same? A fastener with lube on on it has a different torque than a dry fastener. So are your bolts and threads clean? The only way to have them all be "exactly the same", is to measure their length. Otherwise you are only getting it close.
same would be true of a beam wrench with the added variable of the wrench type.

Removing variables is good, right?
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Old 12-08-2014, 06:34   #12
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Re: Torque wrench recommendations?

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Hmm, do you really think they are all the same? A fastener with lube on on it has a different torque than a dry fastener. So are your bolts and threads clean? The only way to have them all be "exactly the same", is to measure their length. Otherwise you are only getting it close.
Yes and no. I worked for a major bolt manufacturer for many years, dirt and thread fouling tend to result in "stiction" issues and hence may result in incorrect assembly, usually the final torque is greater then these issues ( though not always) .

Anyway torque only , is such a poor method of determining clamp load. Most engines are assembled with robotic assembly algorithms that more reliably measure clamp load, but this makes re-assembly in the field to original specifications very difficult. In reality a modern engine can never be rebuilt to the original manufactures assembly specifications.


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Old 12-08-2014, 07:12   #13
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Re: Torque wrench recommendations?

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Thanks to all. Appears I should get my deflection beam set calibrated and keep 'em.
You really can't calibrate a deflecting beam, nothing to adjust and that is part of why for the casual user they are so good, just bend the pointer back to zero if it gets bent and make sure you keep the handle centered and a deflecting beam will always be surprisingly accurate.
Of course they require you to look and the scale with as little parallax as possible which can be tough.
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Old 12-08-2014, 08:38   #14
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Re: Torque Wrench Recommendations?

I had the GearWrench (same as Snap-on, I believe) digital torque wrench, and didn't like it at all. The main problem was that as you moved it, the batteries would lose contact and then reset the torque setting.

I've moved on to CDI. They make nice quality, click-type torque wrenches in a multitude of torque ranges.

Like this :

http://www.amazon.com/CDI-1503MFRPH-...+torque+wrench
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Old 12-08-2014, 10:25   #15
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Re: Torque Wrench Recommendations?

Snap on 'click' type for 3/8 and 1/2
Digital screwdriver type for 1/4
Harbor Freight (tools you use once) for 1" <grin>


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