what are hook spanner wrench's used for?

[young_buck]

I am sure there are a hundred threads about them but what are they used for?

 

[Ign]

Pre-cartridge bottom brackets come to mind.........

 

[EJM02]

Large diameter hose connection. 4", etc. think fire hose. The connections have what are called "rocker lugs", that the "hook" part of the wrench hooks into allowing for more leverage. Hand strength alone is not often enough to get a good seal or loosen the connection before or after the hose has been pressurized.

Two are used in opposing directions on the male and female ends of the connection point.

 

[MFolks]

Also used on some motorcycles to adjust the spring pre load on the rear shocks.

 

[young_buck]

Alright, I have seen these couplers before and no idea how they were removed, good to know thanks

 

[atomicpunk]

Just needed one last week to remove/install a nut on a power steering pump gear for a Cat Diesel. Also used allot on hydraulic cylinders.

 

[larry_g]

For spanner nuts with square slots. Nuts with holes on the periphery use a pin spanner.

lg
no neat sig line

 

[2oolhound]

Also finned sleeve bolts on exhaust headers on many motorcycles.

 

[KnurledNut]

Bearings, hydrualics, accumulators, auto, etc.

 

[mech-tech]

I'll second the use for hydraulic cylinders. These style wrenches are mostly for low torque. Usually on hydraulic cylinders they end up slipping and I am forced to use a brass bunch and sledge to break the gland nut because the wrench won't hold enough for the needed force.

 

[skruft]

Some bicycle parts are removed or adjusted with these.

 

[atwageman]

When I worked on textile machines, I think I recall using them on some Terrot circular knitting machines.

 

[greg9719]

Large diameter hose connection. 4", etc. think fire hose. The connections have what are called "rocker lugs", that the "hook" part of the wrench hooks into allowing for more leverage. Hand strength alone is not often enough to get a good seal or loosen the connection before or after the hose has been pressurized.

Two are used in opposing directions on the male and female ends of the connection point.

This.....look on any fire engine and you'll see plenty of them.

 

[ZRX61]

Aircraft undercarriages.

 

[cjn1014]

yep, storz LDH couplings and NHT couplings on cloth hose. pin spanners for redline.

 

[stroked80z28]

Thrust bearing nuts on geared elevator gear boxes. Or, you can use a hammer and chisel.

 

[davethorik]

i am a machinist some of the TG100 collet holders i run in my cnc mill require those to tighten the caps.

 

[Steinmetz]

i am a machinist some of the TG100 collet holders i run in my cnc mill require those to tighten the caps.

I also use them to tighten collet chucks.

 

[JBourquin]

I used to use them to tighten weather tight wire connections on HMMWV's.

 

[Steevo]

Also finned sleeve bolts on exhaust headers on many motorcycles.

Oh, no, no, no!
For the nuts with slots, like these, yes:

But for "finned" nuts, you need one like this:

 

[theknurl]

hooking wenches?

 

[toomanytoyzz]

Meat grinder

I worked in a butcher shop during high school/college and had a similar wrench but it was at least 24" long. The hopper you would put the meat in was huge.