Cheap Through Hole Lap

[jjr2001]

My little two cylinder steam engine model will need to have the cylinder lapped. I found these thru-hole-laps on eBay. Found some diamond grinding compound on the bay also. The lap 15/16 diameter was close enough to the 1" spec'd size for the piston and cylinder that I could not pass it up for about $6.00 with shipping included! However it was just the brass lap...Needed the support shaft and the tapered plug for expansion. Easy enough to turn and thread a 1/2-20 piece of steel for the shaft and then taper a piece of 1/2-20 all thread for the plug. Should work great and save me the time and brass for making the lap.

Here is a great video by Suburban tool on through hole lapping:

Don has a lot of excellent machining videos on the tube.

Cheers, JR

[Frank S]

I always enjoy watching Don's videos
Good find on your brass laps

[jjr2001]

Thanks Frank, I think Don is among the very best in making understandable videos for the shop.

Cheers, JR

[DIYer]

Thanks jjr2001! We've added your Through Hole Lap to our Machining category,
as well as to your builder page: jjr2001's Homemade Tools. Your receipt:

Through Hole Lap by jjr2001

tags: honing