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Old 01-20-2010, 10:29 AM
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I know I posted these before in my hand tapper thread but I am posting them again because I find more uses for them all the time. I use them on the mill and weldments when you need a extra hand. These have 3/4" bolts. OOPS I already had a post on jacks
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Last edited by digr; 01-20-2010 at 10:37 AM.
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Old 01-20-2010, 11:52 AM
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Jacks are just as useful as belt grinders and Lord knows we got lotsa belt grinder threads
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Old 01-20-2010, 12:27 PM
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You must be psychic; I was just looking at some of these last night in the Grizzly catalog and thinking how easily they could be made.
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Old 01-20-2010, 12:38 PM
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Digr,
those jack's are quite handy.

Now to make them nicer:

Chuck the bolt in the lathe (collet preferably)
and spot a center drill on the head.

Using a 1/2" dia. drill bit, put a 3/8"-1/2" dia.
spot on the head of the bolt.

Use a ball bearing between the head and your work,
the ball will sit nicely in the "divot" and make cranking
the jack much easier (part and jack will not "walk")

Even if you braze a ball up top there (to keep from falling out)
it will work.
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Old 01-20-2010, 05:05 PM
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Digr,

Do you use a lock nut, to hold the height when you get it set?? I'd think that vibration would cause the jack to loosen up without some sort of lock. Looks like a good idea and well done will have to think about making some.

Jack
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Old 01-20-2010, 06:07 PM
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Quote:
Originally Posted by digger doug View Post
Digr,
those jack's are quite handy.

Now to make them nicer:

Chuck the bolt in the lathe (collet preferably)
and spot a center drill on the head.

Using a 1/2" dia. drill bit, put a 3/8"-1/2" dia.
spot on the head of the bolt.

Use a ball bearing between the head and your work,
the ball will sit nicely in the "divot" and make cranking
the jack much easier (part and jack will not "walk")

Even if you braze a ball up top there (to keep from falling out)
it will work.
'Good idea!!
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Old 01-20-2010, 06:09 PM
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Quote:
Originally Posted by platypus20 View Post
Digr,

Do you use a lock nut, to hold the height when you get it set?? I'd think that vibration would cause the jack to loosen up without some sort of lock. Looks like a good idea and well done will have to think about making some.

Jack
I sometimes use a jam nut on them.
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Old 01-20-2010, 10:03 PM
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Nearly all construction pipe fitters use a jack similar to that. Some are short and some are 2 or more feet long. When lifting pipe to square they cut a pipe smaller than a long stud and use one of the nuts on the stud to make it longrer. Sometimes there will be a pile for all fitters to use from. After the flanges are made up permenant pipe holders are made.
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Old 01-21-2010, 07:34 AM
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Nice job as always digr! Hay long time know see......
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Old 01-21-2010, 09:25 AM
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I'll keep my eyes open for a few large threaded rod coupling nuts to make some of these.
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