Search found 17 matches

by Tom - AMS
Mon Oct 24, 2016 12:17 am
Forum: General Discussion
Topic: Questions to ask a CNC shop
Replies: 15
Views: 2092

Re: Questions to ask a CNC shop

thanks - it's worked well for the past 53 years. My company was founded OCT 08, 1963 :-)
by Tom - AMS
Sun Oct 23, 2016 5:35 am
Forum: General Discussion
Topic: Don't want that taper
Replies: 48
Views: 5226

Re: Don't want that taper

if I were going to turn a very precise 0.7200 shaft from 1018, I prefer to start with 7/8" stock rather than 3/4". I'll explain why later. And with your HSS tool, I would hone a narrow vertical flat, about 0.010 wide on the points edge. Make sure the tool is not set above center axis of work piece. ...
by Tom - AMS
Sun Oct 23, 2016 4:38 am
Forum: General Discussion
Topic: Don't want that taper
Replies: 48
Views: 5226

Re: Don't want that taper

when you check for taper, in addition to using the dial indicator to test that carriage travels parallel to a chucked precision test bar, check along the top of the bar - if your tool is rising or falling in relation to the work piece axis, it will turn a taper. (an unworn auto engine's wrist pin wo...
by Tom - AMS
Sun Oct 23, 2016 4:25 am
Forum: General Discussion
Topic: Filleting on a Lathe
Replies: 15
Views: 2662

Re: Filleting on a Lathe

alternatively, one can use a stubby 2 flute ball nose endmill for a form tool with the desired radius clamped in a boring tool holder. As Harold suggests with a hand ground form tool, keep over-hand as short as possible. This works best when turning plastics, such as Delrin, aluminum, brass, and eas...
by Tom - AMS
Sun Oct 23, 2016 4:12 am
Forum: General Discussion
Topic: Questions to ask a CNC shop
Replies: 15
Views: 2092

Re: Questions to ask a CNC shop

contrary to Harold's respected opinion, I know of many small CNC Job shops that take great pride in turning out quality parts, including my own CNC shop. I specialize in prototyping and small batch parts. When I get approached by a potential customer I like to know what the part fits and is required...
by Tom - AMS
Sun Oct 23, 2016 2:39 am
Forum: General Discussion
Topic: Portable Boring Head
Replies: 37
Views: 9782

Re: Portable Boring Head

I own four 4 Kwik-Way boring bars (made by CEDAR RAPIDS ENGINEERING COMPANY) which are similar to your Storm. We use them daily to bore engine blocks, and other part. I think Goodson still offers tool bits and tool holders for the NS model. www.goodson.com › Short Block Rebuilding › Boring Bar Tools...
by Tom - AMS
Sun Oct 23, 2016 2:14 am
Forum: General Discussion
Topic: Tailstock Turret
Replies: 36
Views: 3914

Re: Tool Post Turret

if your small parts are relatively short, consider setting up "gang tooling" on your cross slide. Its fast and rigid. We do this often. For turning we use relatively large diameter but stubby boring bars ( or rigidity; they're easy to mach) If we need to turn a lot off, to make a "stepped" part, we ...
by Tom - AMS
Sun Oct 23, 2016 2:04 am
Forum: General Discussion
Topic: Increasing the diameter of a hole
Replies: 6
Views: 1145

Re: Increasing the diameter of a hole

we frequently repair the pins & bushings for backhoes, utility booms, etc. For those with lager pins, we use a special boring machine that bolts to the side of the boom, has 3-fingers to center it, and bores both bushings at one go, so they're aligned. for smaller "arms" we either align bore them us...
by Tom - AMS
Thu Oct 06, 2016 3:44 am
Forum: General Discussion
Topic: bushing clearance
Replies: 20
Views: 2311

Re: bushing clearance

I have successfully used "single leg" telescopic gages to measure cyl sleeves, ranging from 1" to 4.125", for over 40 yrs. I find them fast and easy to use, yielding very accurate results. Like Harold mentioned, feeling /finding center is key. My technique is simple, close & snug the gage so the tel...
by Tom - AMS
Thu Mar 31, 2016 11:52 pm
Forum: I.C. Engines
Topic: Panhead rebuild project...
Replies: 53
Views: 26294

Re: Panhead rebuild project...

maybe take a count of all the main bearing rollers? ... or it could be a rod bearing roller ( although, those were 0.1875+ dia. IIRC) if all are present, it's possibly one left in the cam chest from an earlier failure/repair? or maybe a lifter roller axle from a prior failure? respects. Tom - AMSMot...
by Tom - AMS
Thu Feb 11, 2016 6:35 am
Forum: General Discussion
Topic: Collet question ?
Replies: 3
Views: 1079

Re: Collet question ?

Mari Tool
http://www.maritool.com/Collets-ER-Coll ... index.html

BTW, Mari tools are pretty dang good for their cost & Frank Mari is a great guy to deal with too

regards,
Tom - AMS
by Tom - AMS
Thu Feb 11, 2016 6:05 am
Forum: General Discussion
Topic: Basic question on mill part setup - part origin
Replies: 22
Views: 2329

Re: Basic question on mill part setup - part origin

I own two CNC production machine shops. We do a lot of 3, 4 & 5 axis milling. Where the part origin(s) is/are doesn't make us any difference, because normally the raw stock is extra big with plenty room for the finished part. In our world, a little extra mat'l is cheaper than set up time and with CN...