Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Largest Manufacturing Technology Community on the Web
Stay Connected:
Search results
-
O
Distortion of A2 air-hardening steel
If I use an acetylene torch to heat a 2"-long rod of 1"-diameter A2 steel that is "perfectly" straight to begin with, to red hot and then allow it to cool, how much can I expect it to warp along its length? -
O
Weight specification for 5C collets?
Imagine a 1"-thick flywheel on a 7/8"-dia. shaft that is inserted the full length of a 5C collet, with face of the flywheel itself sitting almost against the nose of the collet (so the weight is at an effective length of 1/2" from the nose). Is anyone aware of a specification for the maximum... -
O
Help with how to make a particular measurement
I'm hoping one of you can help me with a good suggestion for determining the height 'h' in the attached, cylindrically-symmetric scale drawing to an absolute accuracy no worse than 0.001". That is, the height from the edge of the hemisphere (the edge is sharp, not rounded off) to the ledge that... -
O
Gear cutting: 10DP vs. M2.5
I'd like to repair a few gear teeth with bronze, which will require re-profiling them to remove the excess bronze. The gears are 10DP with a 20-deg. pressure angle and metric involute cutters are less expensive than Imperial. The repaired gears need to mesh, of course, but they operate at... -
O
Fixturing an Imperfect Cylinder
I have to TIG weld a significant missing chuck of aluminum on the base of the cylinder of a 70-year old motorcycle, clean up the bore, then press the sleeve in. The welding will distort at least one end of the aluminum cylinder resulting in it being egg-shaped and hourglass-shaped to some... -
O
How to remove a press-fit shaft from a deep tube?
I need to non-destructively remove a 1-3/4" long, 9/16"-dia. steel shaft that is press-fit 1/4" deep in steel. The problem is it's at the bottom of a 1-1/2"-ID steel tube with the top of the shaft located 7-3/4" below the top of the tube. A simplified scale drawing showing the situation is... -
O
Welding a Sunnen honing adapter
Sunnen honing adapters (e.g. K6-A, K8-A, AK20-A, etc.) are non-magnetic. Has anyone ever successfully welded to them and, if so, what TIG filler rod works? I'd like to adapt an old one to hold a small 3-jaw chuck for external honing and starting from an existing adapter would be faster than...- opscimc
- Thread
- Replies: 10
- Forum: Fabrication: CNC Laser, Waterjet, Plasma, Welding
-
O
Source for a microscope (RMS) tap
Does anyone know a source for taps for microscope objectives of the older, smaller RMS type? The diameter of the Royal Microscopical Society (RMS) thread is approximately 0.8" with 36 tpi and is based on the Whitworth thread form. I've tried the usual sources, as well as the unusual ones, so... -
O
Repairing a bolt
This seems like the most appropriate forum for submitting my question. The attached image is of one of four CEI (British Cycle Engineers Institute) bolts for attaching a fuel tank to an old Triumph motorcycle. The threaded portion is 1/4" long and 5/16" diameter, but has suffered from years of...- opscimc
- Thread
- Replies: 16
- Forum: Fabrication: CNC Laser, Waterjet, Plasma, Welding
-
O
Source for Whitworth threading inserts in small quantities?
I would appreciate it if someone could point me to a source for buying only one Whitworth threading insert (vs. packs of 10) in each of a few pitches. These are for a holder that takes TNMC-32NV inserts for 60-deg. threads. Grainger, for example, sells the 20 and 26 tpi inserts I need but... -
O
New lighting for a shop
I need to light an 1100 sq.ft. shop area. This topic certainly has come up more than once, and I've read old threads where it seems T5 fluorescents often were recommended, but with LEDs coming on the scene it is a moving target. I've already determined from an existing installation that 4-bulb... -
O
Digitization error and precision of measurement
You weren't able to convince them because Leigh is wrong. In the interests of economy the same digitizing electronics can be used for a series of electronics, with those priced at the cheaper end having fewer digits in the display. If the parameter being measured gave a value of, say, 1.49999... -
O
What are options for building up a worn shaft?
I'm restoring the gearbox on a motorcycle and am looking for help to know my options for dealing with wear on the mainshaft. The gearbox is rare (only 400 of them made 60 years ago) so finding a replacement isn't an option. Modifying a closely related one might be an option, but for present... -
O
Advice on a large dia. face/shell mill for aluminum
Because the deal was too good to pass up recently I got a 2" arbor face/shell mill holder for my Bridgeport. Taking as a given all the usual comments that are made about the lack of rigidity of a Bridgeport, the only application of this arbor I can think of is for a large diameter (i.e. ~6")... -
O
Max. tap size for Tapmatic 50X?
Another, ahem, thread on tapping using a manual mill prompted me to ask this question. On the side of my Tapmatic 50X is stenciled that it is good for taps from #6 up to 1/2". However, the opening on the nut that tightens the collets is just under 7/16" in diameter, so a 1/2" tap couldn't even... -
O
Source for a long, small dia. TIG cup needed (smaller than a #3)
I need to construct a replacement for a broken middle fin on a motorcycle head and ideally I need a #2 cup for my WP20 torch to do this. Is such a small dia. cup made and, if so, who supplies them? Assuming one smaller than a #3 does not exist, is there a reason not to make my own equivalent...- opscimc
- Thread
- Replies: 9
- Forum: Fabrication: CNC Laser, Waterjet, Plasma, Welding
-
O
Source for 1/2"-14 (yes, fourteen tpi) socket head cap screws
My old, but great, Brown & Sharpe tilting vise uses two 1/2"-14 machine screws with screwdriver slots for clamping one of the axes. After having wasted some time modifying the heads of 1/2"-13 cap screws I got out the pitch gages and the reason the modifed screws don't work is the old ones... -
O
Need source for large impact screwdriver bits
I'm trying to disassemble an old Brown & Sharpe vise and one of the bolts is giving me trouble. It's a 1/2" diameter bolt with a countersunk cheese head. I used the largest impact screwdriver bit a local machinery company has (5/16" shank; 5/16" width of flat and ~0.06" thickness) and my 300... -
O
Mitutoyo "triangular straightness edge"
My Mitutoyo accessory kit for gage blocks contains a component their catalog describes as a "triangular straightness edge," part no. 619122. These come in English and metric, and in a couple of different lengths, and an example of one can be seen at: Mitutoyo 619022, 100mm Triangular Straight... -
O
How to accurately calibrate a DRO?
First, before asking my question, I'll describe what I've done to date. I bought a DRO whose magnetic scales claim to be laser calibrated to very high accuracy. I finally got around to doing a check of its calibration this weekend using two vernier calipers whose scales I viewed using my...- opscimc
- Thread
- Replies: 59
- Forum: American Machinist