I thought it was called a crow's foot but I guess I'm wrong. It looks like part of a box end wrench on one end but fits on a 3/8 drive on the other. To get at hard to reach nuts. It needs to be 12 pt and be closed, not open like a crows foot style. Looking to fit bolts from say 1/4 to 9/16? It is to fit on a 3/8 torque wrench. I searched on Snap-on's site but I couldn't find it.

check out snap on numbers

tmrh8 1/4
tmrh10 5/16
tmrh12 3/8
tmrh14 7/16
tmrh16 1/2
tmrh18 9/16
or the set is 106tmrh
they are about $15each or 85 for the set
they are 12 point crows foot but they are 1/4 drive.

they have deep 12 point 3/8 drive but they start at 5/8" and go up to 1 1/16

Thanks, However I need 3/8 drive.

Here is the number I ended up with FRDH161

Shannon

did you find what you are looking for?

i haven't seen a crows foot fully enclosed, they are usually used on tube flare nuts

and you can't get and accurate torque reading with a crows foot, you can't use a torque wrench on one

Brendan

Yep, I used the number I posted above. A guy here at work saw me posting and said he'd seen them before.

did you find what you are looking for?

i haven't seen a crows foot fully enclosed, they are usually used on tube flare nuts

and you can't get and accurate torque reading with a crows foot, you can't use a torque wrench on one

Brendan
Don't give any more advice until you learn what you're talking about:shaking: If you can't use a torque wrench on a crows foot, how the fuck would you torque fluid fittings? In all the years I worked as a hydraulic mechanic for General Dynamics and Lockheed, crows feet were the only way to torque a fitting.

As for the original poster, we used to call the tool you're looking for a torque adapter. Snap on did indeed make them along with Bonney, and Williams Tool. We also made them in house by welding a cutoff bit driver to a cutoff wrench. Out of curiosity, why can't you use a crows foot?

i would imagine the torque wrench is reading at the end of the wrench, just like there was a socket on it. but since that point is not where the nut it, there is extra leverage so the torque reading is not the torque at the nut, but at the end of the wrench.

i would imagine the torque wrench is reading at the end of the wrench, just like there was a socket on it. but since that point is not where the nut it, there is extra leverage so the torque reading is not the torque at the nut, but at the end of the wrench.

Incorrect. The torgue is being read at the end of the wrench. But if you apply a given torque at one of an adapter, the reaction force will be an equivalent but opposite torque at the nut end of the adapter.

But that does assume a completely rigid piece. There would be some loss due to deformation. The same way putting too long of an extension on a torque wrench can affect torque reading.

Most crow's feet wrenches don't have the extension that the torque adapters do. Plus the crows feet seem to slip more, even on ARP fasteners. Some of the Craftsman one have spread and dont fit as well.

As for the torque reading, we checked it with and adapter and we checked it with the socket. The adapter consistenly read 2 - 2 1/2 lbs higher than the socket. The adapter is 2" in length, maybe it gives more leverage?

I thought it was called a crow's foot but I guess I'm wrong. It looks like part of a box end wrench on one end but fits on a 3/8 drive on the other. To get at hard to reach nuts. It needs to be 12 pt and be closed, not open like a crows foot style. Looking to fit bolts from say 1/4 to 9/16? It is to fit on a 3/8 torque wrench. I searched on Snap-on's site but I couldn't find it.
Sounds like a distributor wrench?

Most crow's feet wrenches don't have the extension that the torque adapters do. Plus the crows feet seem to slip more, even on ARP fasteners. Some of the Craftsman one have spread and dont fit as well.

As for the torque reading, we checked it with and adapter and we checked it with the socket. The adapter consistenly read 2 - 2 1/2 lbs higher than the socket. The adapter is 2" in length, maybe it gives more leverage?

Okay, after more thought and actually working it out on paper, I think you are right. I was thinking the leverage wouldn't matter because the wrench is reading a torque and not a force on the end.

But, the adapter will see the torque (as given by the drive of the torque wrench, so whatever its set at) and the force on the wrench times the length of the extension.

T(w) = torque at wrench pivot point
T(e) = effective torque on fasterner
L = length of wrench
E = lenght of adapter

T(e) = T(w) * (L+E)/L

or perhaps more useful when you know what torque you want on the fastener and want to set your wrench accordingly

T(w) = T(e) x L/(L+E)

Now, this is the length of the adapter perpendicular to the wrench. If you set it 9 o'clock to the wrench, no adjust should need to be made.

Sorry for the confusion and speaking out my ass earlier. I also think my comment on the extension is wrong, I was thinking of when impacts are using. When using a normal click type torque wrench where the force is applied slowly, shouldn't make a difference. The torque on each end of the extension would need to be the same.

Don't give any more advice until you learn what you're talking about:shaking: If you can't use a torque wrench on a crows foot, how the fuck would you torque fluid fittings? In all the years I worked as a hydraulic mechanic for General Dynamics and Lockheed, crows feet were the only way to torque a fitting.

As for the original poster, we used to call the tool you're looking for a torque adapter. Snap on did indeed make them along with Bonney, and Williams Tool. We also made them in house by welding a cutoff bit driver to a cutoff wrench. Out of curiosity, why can't you use a crows foot?
I have used these also, never seen a snap on one but I have a bonney one around here somewhere, but they went out of business years ago

To all the engineers and rocket scientists that want to start theorizing and reciting shit about leverage and multipliers and torque ratios, if your torque wrench is perpendicular (at a 90 degree angle) to the torque adapter or crows foot, you can torque at what the wrench says. When the torque wrench is in line with the adapter or crows foot is when you have to do math. Don't argue or debate this, it will make you look stupid.(But I expect someone to do it anyways) Come onnnn down.

To all the engineers and rocket scientists that want to start theorizing and reciting shit about leverage and multipliers and torque ratios, if your torque wrench is perpendicular (at a 90 degree angle) to the torque adapter or crows foot, you can torque at what the wrench says. When the torque wrench is in line with the adapter or crows foot is when you have to do math. Don't argue or debate this, it will make you look stupid.(But I expect someone to do it anyways) Come onnnn down.

Yep, standard practice in aviation.

Don't give any more advice until you learn what you're talking about:shaking: If you can't use a torque wrench on a crows foot, how the fuck would you torque fluid fittings? In all the years I worked as a hydraulic mechanic for General Dynamics and Lockheed, crows feet were the only way to torque a fitting.

As for the original poster, we used to call the tool you're looking for a torque adapter. Snap on did indeed make them along with Bonney, and Williams Tool. We also made them in house by welding a cutoff bit driver to a cutoff wrench. Out of curiosity, why can't you use a crows foot?

You guys ever use the flats method for your tube nuts? Sure as hell takes the guess work out of dicking around with a torque wrench.

To all the engineers and rocket scientists that want to start theorizing and reciting shit about leverage and multipliers and torque ratios, if your torque wrench is perpendicular (at a 90 degree angle) to the torque adapter or crows foot, you can torque at what the wrench says. When the torque wrench is in line with the adapter or crows foot is when you have to do math. Don't argue or debate this, it will make you look stupid.(But I expect someone to do it anyways) Come onnnn down.

:laughing: :laughing: :laughing: :laughing: :laughing: :laughing:

Gee, my thirty year-old Snap-On torque wrench came with a chart of corrections for use when one used various attachments on the end of the torque wrench.

If you used good fittings like Swage-Lok, you could use the gauges and get them tightened right every time :flipoff2:

To all the engineers and rocket scientists that want to start theorizing and reciting shit about leverage and multipliers and torque ratios, if your torque wrench is perpendicular (at a 90 degree angle) to the torque adapter or crows foot, you can torque at what the wrench says. When the torque wrench is in line with the adapter or crows foot is when you have to do math. Don't argue or debate this, it will make you look stupid.(But I expect someone to do it anyways) Come onnnn down.

What is wrong with discussing why something works, not just "that it works"? Isn't that one of the reasons for tech forums? :confused:

Also, the original poster noted he was looking for these for "hard to reach nuts". What if some of those hard to reach ones didn't allow him to have the crow's foot or adapter perpendicular to the torque wrench?

yea they r called "dogbones" - we use them in the army every day. snap on ones actually. i work on chinooks and we torque everything! 90 degrees is correct....no matter what extentions or w/e, we got shit in crazy places. i know u guys r all rocket scientists but if boeing thinks its good enough for helicopters, it should suffice on ur rig.

TORQUE ADAPTERS
Proto makes them too.

Too bad im too damn broke to buy a set of them!!

When the hell is crapsman gunna come out with these things so I can actually afford them???

What is wrong with discussing why something works, not just "that it works"? Isn't that one of the reasons for tech forums? :confused:

Also, the original poster noted he was looking for these for "hard to reach nuts". What if some of those hard to reach ones didn't allow him to have the crow's foot or adapter perpendicular to the torque wrench?
Then you do math. The poster is looking for a torque adapter or crows foot with a closed end. This ain't got shit to do with accessibility to anything. An open ended crows foot spreads and slips at a high torque value. The flat ones can torque higher, but they are much wider. The 12 point type are much more streamlined but they will spread and slip at high torque settings.
So what do you want to debate or discuss? I think several folks have posted good info and the original poster still has not clarified what his application is.(besides "hard to reach nuts" I ain't goin there)

The application is for the head bolts on a Brad Anderson HEMI engine, used in top alcohol drag racing. Aluminum hemi heads have an extra set of head bolts that thread into the bottom side of the head and poke down through the deck surface of the block and have to be torqued to 45 ft lbs. We use 12 pt arp nuts. Between the lifter bores and aluminum deck bosses, there isn't much room to torque these guys. They are hard to get to and get covered when the intake is bolted on. So we need them to be right. We torque and un-torque and retorque to crimp the copper headgaskets correctly. We have found out what just tightening them does. Pulls the stud out or torches the head surface & gasket.

we call the thing your looking for a banjo wrench kinda like a crows foot but is fully closed box end. or you need a flare nut crows foot wrench