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200 Series General Forum for the Volvo 240 and 260 cars |
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New (to me) 1980 Volvo 244Views : 2028240 Replies : 4092Users Viewing This Thread : |
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Dec 6th, 2021, 14:28 | #2731 |
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The not so impressive fact is that once it had loosened the nut, the nut then went tight on the thread without me realising so i continued to the point where the bolt just sheared! Live and learn!
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Dec 6th, 2021, 15:46 | #2732 |
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Duplicate post - oops!
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Dec 10th, 2021, 14:48 | #2733 | |
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... as you may see it is just a redundant towing hook clamped in my bench vice. I needed something with some sizeable nuts and bolts (these look like about M18) and some flat sides so I could clamp it safely. I used my torque wrench to tighten the nut up to 140Nm first. The unbranded driver (rated at 330Nm remember) undid it without too much fuss: I repeated the same test with the DeWalt, which also unfastened it easily: Next I tightened the nut up to 180Nm. The unbranded tool struggled but did eventually rattle the nut off. The DeWalt was similar - perhaps a little easier. At the 200Nm the unbranded tool failed to unfasten the nut - lots of hammering and noise but no movement. The DeWalt struggled but did eventually undo the nut. Finally I tried the same test at 210Nm (the highest setting on my torque wrench) - and the DeWalt also failed to move the nut. So, much as I thought, they must use either different Newtons or different metres in the two Chinese factories these tools originated from. The unbranded one certainly isn't capable of producing 330Nm of torque, its limit is (much as I had estimated last week) about 180Nm. The DeWalt slightly out-performed its rated torque, so I'm happy with that. I ought to get out more :-) Alan
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Dec 11th, 2021, 09:35 | #2734 |
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Interesting stuff Alan! Am i right in thinking your "non-brand" wrench doesn't have an LED to illuminate the work piece?
Your test has inspired me to hunt out my towball and bolts (M16, 24mm heads) and try a development of your test. Short version would be to dip the bolts in engine oil (i've got some useless engine oil that would be perfect for this) before assembly and torquing to 200-250lbft. Then give it the blowlamp treatment to carbonise the oil and once cool, try the impact wrench i have and also the torque multiplier as i can drive that with a torque wrench to see exactly how much it takes to loosen the nut. The idea is this will simulate ageing and oil getting on the various fasteners.
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Dec 11th, 2021, 10:28 | #2735 |
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I have a similar attachment for my impact driver but it doesn’t have anywhere near the same amount of grunt (torque) as a good impact wrench. The Dewalt impact wrenches are beasts and a different animal to the impact drivers.
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Dec 11th, 2021, 20:11 | #2736 |
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I confess i don't like the idea of impact drivers at all, way too viscious. i use heat on stubborn nuts. warm them up as mutch as is safe for the site, then dash cold water on, the sudden shrinkage breaks the rust. There is also a very effective releasing spray called Rocket something, way better than WD40 or Plus gas.
The tyre place i go to bans the use of impacts by his employees, all wheelnuts go on an off with those four sided spin wrenches. There is a breaker bar on the rack, but i've never seen them use it. |
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Dec 11th, 2021, 21:04 | #2737 | |
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:-)
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Dec 12th, 2021, 04:50 | #2738 | |
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Quote:
Alan
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Dec 12th, 2021, 07:53 | #2739 | |
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Dec 12th, 2021, 08:56 | #2740 | |
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In other words, if you can't repair the dead batteries in your Erbauer tools when they die (replacement batteries are available in single-cell form on ebay so you can create a battery of cells) then buying new isn't such a bad idea. Still goes against the grain to advise to buy new when the old ones are serviceable or would be with new batteries but you get the idea!
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Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........ Last edited by Laird Scooby; Dec 12th, 2021 at 08:56. Reason: typoo |
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