Warren & Brown torque wrench

[op910]

Picked up a small W & B torque wrench at an auction Model 320300. Measures up to 20Nm (180 in lbs). It has an unusual female square drive end on it. Measured at 7.42mm square (neat). Appears to be not modified or worn.

Anyone seen this before. I can make up my own adapter to drive standard sockets etc, but just interested why this odd size.

Rod

[gamachinist]

With such an odd size,it was a special for who knows what.Some of my dads old rachets had square holes in the head.These didn't reverse so you pushed the square drive from one side to the other to reverse direction.They were 1/2" square drive.
I saw a lot of special torque wrenchs yesterday on a dealers page.Some had open ends,and a few had hook spanners on the end.
Robert.

[Preston]

Many German torque wrenches use this system. Hazet and Stahawillie if i spelled is correctley. Not hard to find the attachments but would have to check and see if there 7mm ect. Preston the Cornwell tool man.

[op910]

Thanks Preston,
Actually I'm flying to England tomorrow with work. Briefly stopping at Frankfurt airport (not long enough to go on a tool search but). However may find some adapters / attachments in the UK now that there is "one Europe"!!

Thanks and regards,
Rod

[Steve_in_Mich]

Why the odd sizes and drive types? I'm not sure but thought that it might have to do with keeping the tools from walking off, if you know what I mean. I have a pretty good set of 5/8" drive sockets and driving tools for them including a bow-tie plus a few (Bonney and Proto) x-millitary 11/32" drive sockets and driver handles (Tee and breaker, no ratchet). I'm hoping they are collectors items worth a fortune along with 11 new Bonney 31/32 " 12 pt. 3/4" drive sockets (apparently the unit pack was a dozen on these). [img]/ubb/images/graemlins/blush.gif"%20alt="[/img]

[46204]

I have a couple of those torque wrench's and the size drive you refer to is correct. They are made in Australia and drive adaptors to suit that size are quite common down here.

[millman5]

Picked up a small W & B torque wrench at an auction Model 320300. Measures up to 20Nm (180 in lbs). It has an unusual female square drive end on it. Measured at 7.42mm square (neat). Appears to be not modified or worn.

Anyone seen this before. I can make up my own adapter to drive standard sockets etc, but just interested why this odd size.

Rod

Be nice if the worl was on some sort of standard measurment huh?????

[Peter_S]

I have a much larger Warren & Brown (later ones had 'Repco' name if I remember correctly). It has a female square drive too (1/2"). They originally come with a male square which fits into the female hole, and which then sticks out the correct amount for a socket etc. The male piece has a spring-loaded ball to prevent it falling out of the torque wrench. I suggest your one is made to take a 1/4" drive, so you should be looking for a 1/4" square, about twice as long as the depth of your female socket, preferably with two spring loaded balls, ie one for the torque wrench, one for the socket.