Thread: Torque wrench capable of up to 250nm

Or alternatively, anyone know anything about torque multipliers - I've heard of things you can put on a torque wrench to extend them and multiply the torque.

"once or twice per year"

250nm is pretty close to 25kg mass (think 25L water jug) applied to a 1m long horizontally oriented breaker bar.

Just gotta sueeze it into the available space!!!!

S

In a past life as a rigger, we used to hire a torque multiplier from time to time. perhaps thats an option. You'd have to fossick out a supplier as I don't know where it came from.
Don.

I use a Warren and Brown 300NM/220ft/lb Tension wrench model # 332500, it is not much bigger than the next size down, I have used on my 300TDi in a Disco so it isn't too bulky. Torque multipliers are good but a bit bulky in tight spots, Regards Frank.

Never have figured out what the hell a Newton Metre is, isn't Newton the bloke who made his name by dropping apples out of trees ? Can't for the life of me work out what this has to do with doing nuts and bolts up properly.

Seriously though, back when I had my old SIIA I was nought but a poor apprentice, emphasis on poor. In those days torque was measured in foot pounds, now there's a unit with meaning. I used to use a 50 lb spring balance (those things you weigh fish with) with a graduated bar on the socket.
One foot out from the socket the spring balance read correctly when aplied to the bar.
Two foot out you doubled the reading, ie. 50lb on the balance equalled 100 ftlb on the socket.
Three feet out you tripled the reading and so on.

Worked for me for many years, not fancy but did the job.

Deano

Originally Posted by DeanoH

Never have figured out what the hell a Newton Metre is, isn't Newton the bloke who made his name by dropping apples out of trees ? Can't for the life of me work out what this has to do with doing nuts and bolts up properly.

Seriously though, back when I had my old SIIA I was nought but a poor apprentice, emphasis on poor. In those days torque was measured in foot pounds, now there's a unit with meaning. I used to use a 50 lb spring balance (those things you weigh fish with) with a graduated bar on the socket.
One foot out from the socket the spring balance read correctly when aplied to the bar.
Two foot out you doubled the reading, ie. 50lb on the balance equalled 100 ftlb on the socket.
Three feet out you tripled the reading and so on.

Worked for me for many years, not fancy but did the job.

Deano

I shake my fist at anything but metric! (Nm is metric!). Not sure if your first bit is serious, but yes Newton is the apple guy and is related to a Nm.

1Kg of weight on a 1 metre bar = 9.8Nm. The Newton is because the weight of the object is created by gravity, which was quantified by Newton as 9.8

The spring balance is a great idea. I'll be doing something similar for my timing belt tension of 11Nm. Be buggered if I'm spending $300 on a torque wrench for this one job. Just don't forget the bar has weight which adds force as well!


Lastly, I recently purchased a bigger torque wrench off ebay for occasional use (up to 200Nm). There are some really cheap ones on there depending on whether you want a brand name one. If it's for occasional use only, ebay cheap brands can be great.

Kinchrome do a Reflecting Beam 40-300NM 1/2" Drive for around $250 RRP. Should be easy to source and pick up cheaper than that.

http://www.kincrome.com.au/web/catal...rtnumber=K8030

Other than that, Stahlwille make heaps in the 70-300NM range, though probably too much $$$ for 1 or 2 times per year.

Multipliers are going to be far too big and expensive for your application. Last Stahlwille one I enquired on was over $7k

CC

wtf are you working on that needs to be done up that tight?