Thead Chaser

by JAY HANSEN in General Tech Discussion 5 years ago

for 912ULS. I have a plug hole where the first couple of threads are just not right. I was told I can use a chaser. If I do, how do I keep the metal shards out of the cylinder?

Page 1 of 2

Start
Prev
1
2
Next
End

Re: Thead Chaser

by Rob Seaton » 5 years ago

Rob Seaton

3 1.32k 240

I have heard of using a vacuum:Reduce the hose OD with an adaptor (make out of wood) with a small flexible hose run into the cylinder from the other spark plug hole.

Report
Re: Thead Chaser

by David HEAL » 5 years ago

David HEAL

23 186 409

Use the positive pressure side (outflow) of your vacuum to blow into the opposite spark plug hole or use compressed air. Also, use some grease on the chaser to hopefully capture any shards or debris.

Report
Re: Thead Chaser

by Ken Ryan » 5 years ago

Ken Ryan

28 360 928

This probably goes without saying, but if you use a vacuum to blow air into the cylinder, make sure it is clean air.

Report
Re: Thead Chaser

by Roger Lee » 5 years ago

Roger Lee

125 5.12k 4.52k

There is a difference between a 12mm thread tap vs a spark plug thread chaser. The tap has very sharp metal cutting edges and it will cut the threads and leave shavings verses a plug thread chaser that has a more dull rounded cutters that do more reshaping and conditioning than cutting. I would not use a standard 12mm thread tap. Apply a bit of white lithium grease to the cutter and it will work more smoothly, do a better job and catch any particles. Don't use it dry.
Use the right tool.
Like this:

https://www.tooltopia.com/lang-tools-1013a.aspx?utm_source=google&utm_medium=cpc&utm_campaign=paid_search_google_pla&adpos=1o2&scid=scplpKAS1013A&sc_intid=KAS1013A&gclid=EAIaIQobChMI8OaluoTv3wIVwiCtBh12aAEZEAYYAiABEgJ5mvD_BwE

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Thank you said by: Ken Ryan

Report
Re: Thead Chaser

by Kevin Stewart » 5 years ago

Kevin Stewart

3 386 1.15k

This is what I used: https://www.amazon.co.uk/Choice-Draper-XS17-24867-Expert-Recovery/dp/B06Y1XXQK4/ref=sr_1_1?s=diy&ie=UTF8&qid=1548016490&sr=1-1&keywords=draper+thread+recovery+m12

You put it into the hole and gradually expand it, unscrewing it until you get the result you want. It doesn't create large shavings that fall into the cylinder as you can cut on the way out as it unscrews.

Report

Page 1 of 2

Start
Prev
1
2
Next
End

You do not have permissions to reply to this topic.

Thead Chaser

Recent Videos

Safety First!

ROTALK News

Prize Giveaway!

Log In/Out

Login