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In the past I used a rotary table to locate the bolt holes in a bolt circle. Have decided to try the Boltcirc program by Marv Klotz. Have a small problem with the output, which probably means my input is bad. Garbage In/Garbage Out. If I have an equally spaced 6 hole bolt circle with the...

Greetings, Has anyone any experience with a expanding 5C collet to hold an ID of a flywheel? I thinking in terms of a Elmer sized flywheel, 3" brass with 1/4" center hole. Read an older post that mentioned wobble but with a snug fit and up against the shoulder of the collet is that really a...

Greetings, It has been quite some time since I have posted. I had moved to a job site where there wasn't access to machine tools but the situation has changed and I'm back in the saddle again. ;D Me thinks an Elmer's Mine Engine #29 is in the future. Was wondering if this 5-C Collet Index (the...

I have an William's FP-AG-TK rear aperture (peep) sight https://www.airgunsofarizona.com/WilliamsGunSights.html on a air rifle that I need to be able to lower a little more then currently possible. It is a very simple job but can easily be screwed up. Just want to remove .050 thousandths from...

There are some threading dies where I work that are not adjustable (but are not thread chasing dies). What would cause the die to cut a full thread on one side of the round stock and not on the other. This was a 5/16 die NC and the stock was turned to .306. Stock was an unknown type of stainless...

First time on air: The reversing gear is is very slick. Go Elmer!!! Jim

Purchased a set of Enco collets and collet blocks a few weeks ago and it has made work holding in many cases a piece of cake. How did I ever get along without it. Was wondering the purpose of the small screw towards the back of the collet block that fits a groove that runs the length of the...

Thought I'd make a engine that allowed a minimum amount of operator interaction and after following Zee's saga Elmer's 43 seemed a natural. Plus it let's me try out my newly purchased el-Cheapo Enco 5c collets and collet block set. So far - so good... Crosshead build: 7/16ths? Close enough...

Is there any reason not to put a collet block in a four jaw lathe chuck or any particular things I should be aware of? Obviously a collet chuck is preferred but that is not in the cards at the moment. Bought a cheapo set from Enco and will be putting them to use soon. Thanks Jim

Any ideas where to get individual (plastic) containers for 5c collet storage? TIA Jim

Decided to make something quick and dirty. Hope I get these videos embedded right - Running on compressed air: and this is actually running in reverse with me inhaling. I think I get a better seal between cylinder and body. At least that is the only explanation I can come up with: That...

Done that is except maybe for some final clean up/polishing, but for now it goes up on the shelf. The final stretch included machining the flywheel bearing "caps" and the beveling of the base pieces. Also cold blued the steel parts of the engine. Time to start thinking about the next "one"...

There has got to be a better way. I use a lathe that has a 4 jaw that will not clamp with all 4 jaws a part smaller than about 1/2". This requires that I hold it directly with 2 jaws and use some sort of "packing" in the other two. This can be a real pain to set-up and get square/rectangular...

Been working on this for a while, as time permits, and hope to have it done in another 2-3 months. The documentation (pictures) is not thorough, as I don’t make a habit of keeping a camera on hand. I started with the cylinder heads: Then the cylinder itself: The base and sub-base...

I know of Elmer's plans on the John-Tom site and the same plans from the four yahoo Elmer's Engines groups. I'm hoping to find a cleaner version of Elmer's Mill engine #33. Those have the margins cut off on them and I like to use the drawings as part of the engine "display". Are there better...

Are these a good compromise over a set of expensive individual mics? Thanks Jim

Have made this piece in 303 stainless up to the point where the next step is to cut the reliefs on both sides with the .187 radius also. So I can use a 3/8" end mill and use the side of the cutter to achieve the approximately .112 depth and also the .187 radius on the end of the cut. Is there...

Hi All, Just started work on the "Miser" Stirling engine. The drawing calls for some of the parts to have the edges of some parts rounded to a specific radius, for example, .062. How is that accomplished? TIA Jim

Might as well get this posted as an incentive to carry on till finished. Need to order some ball type end mills to finish the column per (Jerry Howell's) drawings. Jim

Been looking at small (3"-4") rotary tables for purchase and see that some come with a hole in the center of the table while others have the slots continuous and cross at the center. What are the advantages/disadvantages between the two...