Special torque wrench?

[Indy125]

Hello All,

I know about torque wrenches and all, but I will run into a nut that only has two parallel flats on it, so I can only use an open end wrench to tighten down. A socket won't fit over these nuts, so using a traditional torque wrench with a socket isn't an option.

Does a torque tool exist that uses an open end style? Or what else could I use?

Thanks for pointing me in the right direction!!!

 

[CJM8515]

Crow foot wrench, they also make box end adapters

 

[noid]

But really, use a crowsfoot and this:
http://www.cncexpo.com/TorqueAdapter.aspx

 

[coljar]

It depends on how often you run into one. Back 30 years ago when I had my business, if I needed a special tool more than once to fix something, I bought it. I looked in my latest Snap-On and SK cat., but off hand didn't see the socket you need.

 

[CJM8515]

^ it says in-lbs on nut in OP's the pic

 

[coljar]

Yeah, I just seen it and erased that part. One of the guys that worked for me at the time would say I was always looking for a reason to buy another tool.

 

[Wamsutta]

QC1I200 40-200 in-lb

QCP300 30-300 in-lb (preset for repetitive applications)

 

[Wamsutta]

Screaming deal on a preset.

https://www.ebay.com/itm/SNAP-ON-QC...2f10542:g:51gAAOSwv0tVU2lk&LH_ItemCondition=3

 

[reptilezs]

torque using the hex that is on the pivot. you wrench needs to work counter clock wise

 

[joeswamp]

I'm surprised a 6-pt socket wouldn't work, the nut looks like it's a standard hex shape that's had some material removed (rather than added). I would think the flats on the 6-pt would be enough.

 

[guy48065]

Most good torque wrenches come with a manual that includes the calculations to compensate for adapters that extend beyond the head. The online calculator in post #2 is awesome.

 

[2oolhound]

If you have clearance and can position a crow's foot 90' on your torque wrench (so it doesn't stick out the front but is 90' up or down) your torque will remain equal. But yeah, like Joeswamp says it looks like a 6pt socket should fit and may even contact the side edges near the flat.

 

[bwringer]

I'm surprised a 6-pt socket wouldn't work, the nut looks like it's a standard hex shape that's had some material removed (rather than added). I would think the flats on the 6-pt would be enough.

I think there's something sticking up through the nut when it's installed, so a socket won't fit.

 

[Ole Slewfoot]

16.66 lb on a 1' open end wrench

 

[2oolhound]

^^^^ he said 1' (which means a one foot long wrench)

 

[Toothaker]

^^^^ he said 1' (which means a one foot long wrench)

Yes, I figured that out seconds after posting that. I read " when he actually typed '.

It's deleted.

 

[Jazz1]

Hello All,

I know about torque wrenches and all, but I will run into a nut that only has two parallel flats on it, so I can only use an open end wrench to tighten down. A socket won't fit over these nuts, so using a traditional torque wrench with a socket isn't an option.

Does a torque tool exist that uses an open end style? Or what else could I use?

Thanks for pointing me in the right direction!!!

What the heck is the nut is off?

 

[Indy125]

Thanks everyone! This message board is THE best because of its members!

The nut is from Trek Bicycles, the rear ABP (advanced braking pivot). It holds the seat stay and chain stay together on some full suspension bicycles.

 

[nmantas]

200 in lbs is less than 20 ft lbs so pretty low torque.....I would take a cheap 6pt socket of whatever size it is and use a grinder to carve out material till you had a two sided socket. It won't be strong but will most likely not flex with only 200 in lbs of torque.

 

[ChrisLS8]

200 in lbs is less than 20 ft lbs so pretty low torque.....I would take a cheap 6pt socket of whatever size it is and use a grinder to carve out material till you had a two sided socket. It won't be strong but will most likely not flex with only 200 in lbs of torque.

This. Cut notches out for the sides about the height of the nut. Easy peazy

 

[intimidator782]

you could always use a weatherhead socket depending on the application. otherwise as others have said, crowsfoot would work well.

 

[nmantas]

This. Cut notches out for the sides about the height of the nut. Easy peazy

Get a little crazy with a few files and even sandpaper to finish it up and make sure that the nut doesn't get scratched or scarred.....keep it in the box for another 20 years and probably never use it again.

 

[D-Vice]

 

[WWheeler]

WTF is that frankencrescentorque?

 

[wvrailroader]

WTF is that frankencrescentorque?

I had to look it up out of curiosity since I thought it was a photoshop. Apparently it is a real thing. KTC GEK085-W36E. Amazon has them, but they aren't remotely cheap. All the ones I found were over $600.

 

[mrjaw14]

wow, it's surface drive and everything lol

 

[joeswamp]

I still don't get why a 6pt socket won't work. I searched for "trek abp nut" and found this exchange on another forum:

https://forums.mtbr.com/general-discussion/torque-tool-trek-abp-rumblefish-870719.html

Now that I'm reassembling the bike, I realized that the ABP Nut (part number W305084 seen here at this link on page 32 of the download) needs to be torqued to 200 in.-lb.
...
This is a "specialty nut" that is rounded on two sides & flat on two other sides.
...
Has anyone found a socket/tool to adapt to a torque wrench for this job? I have an email sent to Trek Service, but am not betting on a speedy reply =).

The guy then responds to himself:

A service rep at Trek emailed me back, saying that a typical 20mm socket should fit fine over this nut. I feel like a doof. Anyway, thanks to Trek for the email!

There are situations where you need to torque something with an open end wrench, but I don't think this is one of them.