5/8 helicoil

[2cubs2cases]

Is this what you are looking for?

Helicoil 5521-10 Thread Repair Kit - (NC) Fractional 5/8-11 x .938, Drill Size 21/32”, course Helicoil 5521-10 Inch Fine Thread Repair Kit - 9/16-18 x .844

Heli-Coil has the most effective and universally accepted method of thread repair. Heli-Coil inserts quickly and permanently restores stripped, worn or damaged threads to their original size and condition. Inserts work in any part of material; aluminum, magnesium, cast iron, bronze, etc. The use of light weight materials in fuel efficient cars means more thread damage..there is a Heli-Coil insert to repair virtually every application. Restore parts that otherwise would have to be scrapped.

# Features: Thread Size 9/16-18 x .844 Length
# Tap Part No. - 821-9
# Installation Tool Part No. - 2299-9
# Tool Type - 3
# Insert Package Part No. - R1191-9
# Drill Size - 37/64" (Drill bit not included.)
# 6 Inserts Per Kit

 

[bob in CT]

Is this what you are looking for?

Helicoil 5521-10 Thread Repair Kit - (NC) Fractional 5/8-11 x .938, Drill Size 21/32”, course Helicoil 5521-10 Inch Fine Thread Repair Kit - 9/16-18 x .844

Heli-Coil has the most effective and universally accepted method of thread repair. Heli-Coil inserts quickly and permanently restores stripped, worn or damaged threads to their original size and condition. Inserts work in any part of material; aluminum, magnesium, cast iron, bronze, etc. The use of light weight materials in fuel efficient cars means more thread damage..there is a Heli-Coil insert to repair virtually every application. Restore parts that otherwise would have to be scrapped.

# Features: Thread Size 9/16-18 x .844 Length
# Tap Part No. - 821-9
# Installation Tool Part No. - 2299-9
# Tool Type - 3
# Insert Package Part No. - R1191-9
# Drill Size - 37/64" (Drill bit not included.)
# 6 Inserts Per Kit

They need a better proofreader.... :lol:

 

[Bus Driver]

Does any one know the tap size for a 5/8 11 Helicoil? And or a 5/8 11 Redicoil? I received a recent catalog from WTTOOL.COM.
On page 10 they have a listing of Special thread hand taps. One of those listed is 11/16 11. For some reason they have a special price on that size $2.00.
It is listed on page 10 of their latest special flier. I can get it up on line but not sufficiently large to read it. At that price if it is the right one You could afford to get a couple and grind one down to intermediate and another as a bottom tap.

To repeat myself is that the right size 11/16 11

Link to catalog

http://www.wttool.com/info-exec/view/flyer_viewer_2k101

Edited I tried order 11/16 11 taps and the charged $1.00 each even less than the catalog showed. They had both straight fluted and spiral fluted taps in that size for a buck. In my experience Spirals are often bottom taps. At that price I decided to take a gamble and ordered 4 of each. I'll let you know how it works out.

I like the creative thinking behind this post. Sometimes progress and savings results. I do not have an 11/6-11 tap nor bolt to measure and am not near my 5/8-11 Helicoil at the moment. 11/6-11 is definitely not considered a standard thread. 11/16-12 and 11/16-24 are listed in the Machinery's Handbook. The 21/32 drill (tap drill for the coil insert) is 0.6525 expressed as a decimal. The 11/6-12 thread tap drill size is 0.597 minimum and 0.620 maximum for the various classes of fit. So it must be assumed that the 11/16-11 tap is a not a usable substitute for the coil insert tap. Almost certainly too small.
Incidentally, Helicoil invented and patented the coil insert. While they continue to enjoy copyright protection for the name Helicoil, the product patent has long since expired and others now make inserts to the original specifications. The price spread between the various makers has mostly disappeared over time.
Another incidental fact is that 3/4-10 tap drill size is also 21/32. A hole previously tapped for 3/4-10 can be tapped for a 5/8-11 coil insert, but thread engagement for the outside of coil will not be especially good for the full length of the coil.

 

[Randy Tuura]

These inserts worked real well for me no special drills or taps to buy. More beef then the heilicoil.
http://www.grainger.com/Grainger/wwg/se ... ring=4zb95

These inserts are okay, but at the rolling and stamping factory where I worked for 14 years as a tool and die maker we preferred heli-coils especially for cast iron. We only used the insert kind of repair when the holes wore to the point that a heli-coil could no longer be used.

My two cents? Go with a heli-coil as your first option.

Oh, and we were often able to use the heli-coil tap in the hole with worn out threads without drilling it first. IMHO a 5/8" drill would be more than ok for preparing to use a heli-coil tap. You'll have to use lots of elbow grease as you'll be way over a 70% thread and thats good for heli-coil repairs.

 

[John *.?-!.* cub owner]

I have arthritis in my shoulders and neck as well as my back, and I messed up the tendons in both elbows several years ago so i sometimes have to be a little creative about what I do when turning wrenches that require large amounts of effort. I dug around in my tools till I came up with a fit-all socket (interior has spring loaded pins, supposed to be usable on any bolt, but works good on none), and put a 3/8 to 1/2 adapter on it and used my 25+ year old impact wrench that is about worn out to do the threading. I put some oil on the tap, ran it a little, backed out and cleaned, then ran some more. It was slow, but no strain doing it. The fit-all absorbed the slamming of the impact so it was more surges than hammering.

 

[beaconlight]

Bus Drive hit it on the head. The taps came this evening. I don't have mics at home but the 11/16 11 is smaller than the Tap in my Perma-Coil kit. I had a kit and used it to install a Coil. I felt the original tapping was done with a Bottom tap. So i ground off the starting threads and used it as a bottom tap. Later I discovered i needed to do a hole on the other side so I bought a second kit. I have that home here with me. When i saw the add for !!/16 11 taps so cheap I figured what the heck and ordered. Because they are hand Taps they have many more starting threads than I expected. Of course a grinder can reduce the number. I will try them and follow with the tap from the kit and the them the bottom tap. I expect to get a cleaner thread that way, Who knows, been wrong before so I know how to do that.

If any one has a final needing treatment bring it to Cecils end of February and we can do a project for I will have all the stuff, 21/32 bit, more taps than I can count as well as a dozen inserts.

I had hoped to make Florida fest but with Bevs Cataract operation it just isn't in the cards.

 

[danovercash]

Dad's drill...
http://photos.cubfest.com/displayimage.php?pos=-21627

 

[Bus Driver]

Interesting idea to use the 11/16-11 tap first and follow with the coil insert tap. Should work well. I found an old invoice from WT where I had bought a bottoming tap for the 5/8-11 insert. It was $17.00. The drill that John Puckett displayed looks like a PET, Portable Electric Tools. The company products were popular during the 1950s, perhaps earlier. That brand disappeared years ago. Either folded or were acquired by others.