Author Topic: Thread repair (Read 3358 times)

P.abrera · « **on:** December 04, 2014, 03:19:16 PM »

Using a pair of kawi KZ cast rims for my 560f build. Need to chase/repair some damaged threads on the rear axle. Cant quite figure out what tap/die thread size and pitch i need, anyone familiar with these? From my resrarch these are about an '80-'83 kz 750 rims. Thanks

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bjbuchanan · « **Reply #1 on:** December 04, 2014, 07:23:16 PM »

Quote from: calj737 on December 04, 2014, 06:57:15 PM

You don't have a pitch gauge?

Probably wouldn't have posted the question right?

I'm gonna guess m10x1.25, maybe m12. Doesn't help much

754 · « **Reply #2 on:** December 04, 2014, 08:46:24 PM »

Measure with a wrench if needed the good part of thread. Probably use another bolt to determine pitch..or measure threads in 10mm..then divide by 10.

70CB750 · « **Reply #3 on:** December 05, 2014, 03:44:41 AM »

Quote from: P.abrera on December 04, 2014, 03:19:16 PM

Using a pair of kawi KZ cast rims for my 560f build. Need to chase/repair some damaged threads on the rear axle. Cant quite figure out what tap/die thread size and pitch i need, anyone familiar with these? From my resrarch these are about an '80-'83 kz 750 rims. Thanks

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Take a piece of paper and imprint the thread on it, than use caliper to measure the thread pitch.

You can find taps and dies of any size on http://www.use-enco.com/CGI/INSRHM but if the damage is minor, you can also use a tap of the correct pitch and "comb" the imperfections out using the tap as a thread repair tool.

754 · « **Reply #4 on:** December 05, 2014, 07:21:59 AM »

I think he said axle threads, if it is I will often recut the threads the next size, but some shops may not do it for reasonable. So is it the axle, or threads in the hubs?

750cafe · « **Reply #5 on:** December 05, 2014, 07:31:52 AM »

I happen to have a pair of Kwacker cast rims handy right now. Which bolt/bolt hole are you questioning???
What is the diameter of whatever it is that you need the thread pitch for???

Eric

bjbuchanan · « **Reply #6 on:** December 05, 2014, 10:45:27 AM »

Quote from: calj737 on December 05, 2014, 03:33:43 AM

Quote from: bjbuchanan on December 04, 2014, 07:23:16 PM
Probably wouldn't have posted the question right?
Ergo, it was a rhetorical question, posted with a smattering of disbelief

Just busting your balls.

I would go to home depot and get nuts in the size really close and compare if in a pinch

BobbyR · « **Reply #7 on:** December 05, 2014, 02:14:37 PM »

Quote from: P.abrera on December 04, 2014, 03:19:16 PM

Using a pair of kawi KZ cast rims for my 560f build. Need to chase/repair some damaged threads on the rear axle. Cant quite figure out what tap/die thread size and pitch i need, anyone familiar with these? From my resrarch these are about an '80-'83 kz 750 rims. Thanks

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To answer your question, of it is axle threads you can carefully restore the thread with a die. You can figure out the size by trying to thread different dies on.

If it is the hub threads you use a tap to slowly work the deformed metal into place. There are a couple of good threads with pics on this subject.

750cafe · « **Reply #8 on:** December 06, 2014, 10:04:18 AM »

As I stated earlier in this thread, if you simply tell me which bolt you need information about, I have the bolts AND the thread pitch gages to tell you what you need.
As I am NOT a clairvoyant, I cannot guess which one(s) you are questioning and needing the spec(s) for.

Eric

754 · « **Reply #9 on:** December 06, 2014, 10:06:47 AM »

Not sure why people ask for help, and then do not return..??

Restoration Fan · « **Reply #10 on:** December 06, 2014, 04:20:31 PM »

Quote from: calj737 on December 06, 2014, 12:45:01 PM

Easy guys, he lives in the phillipines. He'll be back

Hopefully. The Phillipines are getting hammered by the biggest typhoon in quite some time right now.

750cafe · « **Reply #11 on:** December 06, 2014, 10:49:54 PM »

Good point.

He might not be able to find the bike after it hits anyway.

Eric

P.abrera · « **Reply #12 on:** December 07, 2014, 04:01:51 AM »

Sorry gents, were having a patch of rough weather here, busy battening down the hatches. Took the axle along to the hardware coupla days ago to find a suitable nut but the damaged threads kept me from figuring out what nut would fit and hence also the die that i would also need to comb out the damage (if that make sense?) i think the answer is to go to a better stocked store and pick up a pitch guage as suggested. For reference, the offending part is 41068A in the fiche. Should be able to figure it out once i get a pitch guage. I suspect its coarse pitch M18, maybe?

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Restoration Fan · « **Reply #13 on:** December 07, 2014, 04:09:01 AM »

No idea on the answer to your question but glad to hear you made it through Typhoon Hagupit all right.

P.abrera · « **Reply #14 on:** December 07, 2014, 04:35:09 AM »

Quote from: calj737 on December 07, 2014, 04:25:30 AM

I think you'll find the pitch to be fine, not coarse. Maybe 1.5 for an M18

apparently its a fine, M16

now to find a correctly sized die...

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P.abrera · « **Reply #15 on:** December 07, 2014, 04:37:32 AM »

Quote from: Restoration Fan on December 07, 2014, 04:09:01 AM

No idea on the answer to your question but glad to hear you made it through Typhoon Hagupit all right.

Thanks. Not outta woods yet, its a slow moving storm. Southern provinces are getting pumelled but weve been relatively lucky in the city so far. Just the outer bands bringing lotsa rain our way.

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70CB750 · « **Reply #16 on:** December 07, 2014, 05:09:44 AM »

Hold on and good luck!

754 · « **Reply #17 on:** December 07, 2014, 09:30:24 AM »

And machinist can probably pickup the pitch from the good part of the thread.
You can't easily comb the male thread.
Finding a die is usually not easy.
Check the nut carefully, if wrong pitch, it caused the problem.

As I said before, if you have access. To a machinist, often if it's bad they will cut down to a smaller size if you have a suitable nut.
Bringing up something nobody mentioned.. Can you not use your axle?

750cafe · « **Reply #18 on:** December 07, 2014, 01:34:33 PM »

Quote from: P.abrera on December 07, 2014, 04:01:51 AM

Sorry gents, were having a patch of rough weather here, busy battening down the hatches. Took the axle along to the hardware coupla days ago to find a suitable nut but the damaged threads kept me from figuring out what nut would fit and hence also the die that i would also need to comb out the damage (if that make sense?) i think the answer is to go to a better stocked store and pick up a pitch guage as suggested. For reference, the offending part is 41068A in the fiche. Should be able to figure it out once i get a pitch guage. I suspect its coarse pitch M18, maybe?

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Exactly what I needed. BRB...

Watch out! http://www.msn.com/en-us/video/watch/video/vi-BBgrdqd?ocid=OutNUS&from=OutNUS&FORM=BWVOLC

Eric

750cafe · « **Reply #19 on:** December 07, 2014, 01:43:31 PM »

The bolt has a diameter of 17mm the threaded end is 16mm X 1.5 pitch. Try to find a 16mm/ 1.5 pitch die between the flying tree branches. Good luck!

Eric

P.abrera · « **Reply #20 on:** December 07, 2014, 03:23:55 PM »

Quote from: 750cafe on December 07, 2014, 01:43:31 PM

The bolt has a diameter of 17mm the threaded end is 16mm X 1.5 pitch. Try to find a 16mm/ 1.5 pitch die between the flying tree branches. Good luck!

Eric

its a big one alright...

Thanks for the measurements, youre a champ, Eric

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NobleHops · « **Reply #21 on:** December 07, 2014, 03:58:14 PM »

Quote from: 750cafe on December 07, 2014, 01:43:31 PM

The bolt has a diameter of 17mm the threaded end is 16mm X 1.5 pitch. Try to find a 16mm/ 1.5 pitch die between the flying tree branches. Good luck!

Eric

Great support Eric.

P.abrera · « **Reply #22 on:** December 07, 2014, 04:17:13 PM »

Quote from: 754 on December 07, 2014, 09:30:24 AM

And machinist can probably pickup the pitch from the good part of the thread.
You can't easily comb the male thread.
Finding a die is usually not easy.
Check the nut carefully, if wrong pitch, it caused the problem.

As I said before, if you have access. To a machinist, often if it's bad they will cut down to a smaller size if you have a suitable nut.
Bringing up something nobody mentioned.. Can you not use your axle?

Still in the build phase. Took the bike home in boxes, axle was missing the nut. I think you may be right, thread likely abused by PO forcing the wrong nut.

Will take it to a machinist after this storm blows over. Hopefully it can be saved as i just ordered the 16 mm kawasaki castle nut/cotter pin

. If its too far gone, will size down as suggested. Great advice, thanks!

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750cafe · « **Reply #23 on:** December 07, 2014, 06:17:36 PM »

On my project, I am actually going up in size to 20mm axle/bearings/spacers. Fitting some '84 GPZ750 bits onto an '83 Suzuki GS1100E frame with a '02 Bandit swing arm.
Today, I started to see if I could get the '85-'86 Suzuki GS1150ESF fairing to work...

Try to stay safe on those Islands.

Eric

P.abrera · « **Reply #24 on:** December 08, 2014, 03:16:19 AM »

Quote from: 750cafe on December 07, 2014, 06:17:36 PM

On my project, I am actually going up in size to 20mm axle/bearings/spacers. Fitting some '84 GPZ750 bits onto an '83 Suzuki GS1100E frame with a '02 Bandit swing arm.
Today, I started to see if I could get the '85-'86 Suzuki GS1150ESF fairing to work...

Try to stay safe on those Islands.

Eric

Thanks.

The 80's rock

i have it bad for the early 80's target-designed katanas and the '86 top gun GPZ 900r. ...sigh. One project at a time.

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750cafe · « **Reply #25 on:** December 08, 2014, 03:02:05 PM »

They were fast/comfortable bikes back then and still are today. With 90-130HP, they has an adequate amount of GO in them still.
My current project at 1230cc's and with all of the Hot Rod parts/machine work, is going to be in the 150-165HP range. A little more than adequate.

Have you been hurt by the storm either physically or monetarily? House and loved ones are OK?

Eric

P.abrera · « **Reply #26 on:** December 08, 2014, 04:00:35 PM »

Quote from: 750cafe on December 08, 2014, 03:02:05 PM

They were fast/comfortable bikes back then and still are today. With 90-130HP, they has an adequate amount of GO in them still.
My current project at 1230cc's and with all of the Hot Rod parts/machine work, is going to be in the 150-165HP range. A little more than adequate.

Have you been hurt by the storm either physically or monetarily? House and loved ones are OK?

Eric

Southern provinces got hammered, but the storm had thankfully significantly weakened by the time it made landfall in the city. Thanks for asking. Keep us abreast of your project, sounds like its gona be somethin special

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Author Topic: Thread repair (Read 3358 times)