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Type: Posts; User: joe greiner

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  1. Replies
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    Probably just to make room for the boat. ...

    Probably just to make room for the boat.

    Cheers,
    Joe
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    According to Google, dfx is an audio file format....

    According to Google, dfx is an audio file format. CAD, however, is dxf. This is a text-based ASCII file, with commands compatible with CAD programs.

    CAD programs typically don't care about the...
  3. India Ink

    Several years ago, NASA found that India ink is best for polishing Al. Improves fuel consumption, I guess.

    Cheers,
    Joe
  4. Sticky: Include pictures if possible. Cheers,J Joe

    Include pictures if possible.

    Cheers,J
    Joe
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    Tube Storage

    Wrap a rubber band around the can, doubled if necessary. Tuck the tube between the rubber and the can.

    Joe
  6. Several years ago, NASA found the best polish for...

    Several years ago, NASA found the best polish for aluminium (for airplanes to reduce wind resistance and improve fuel consumption) was India ink. I believe it's water based, so should clean up...
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    Electrician's fish wire, about 3mm x 1mm, is used...

    Electrician's fish wire, about 3mm x 1mm, is used to feed wiring in walls. Street sweeper bristles are about the same size.

    Cheers,
    Joe
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    Sometimes called "she-bolts." Also, Google...

    Sometimes called "she-bolts."

    Also, Google [charles leonard aluminum screw posts]; may be found at office supply shops.

    Cheers,
    Joe
  9. I have a vague recollection of doing something...

    I have a vague recollection of doing something like this, using a drill press with a V-block and a distant support for the far end.

    Drill the first hole near one end. Reverse the pipe. Place a...
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    Like Robbo did:...

    Like Robbo did: http://www.woodworkforums.com/f8/safety-videos-161900/

    Post on YouTube, then embed a link in your message.

    Cheers,
    Joe
  11. Press brake with 135-degree dies (plus springback...

    Press brake with 135-degree dies (plus springback allowance - establish by test).

    Also test for consistent location of work points along the raw material.

    For AL, you could probably use DIY...
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    Lost Wax?

    Maybe:

    Clone the quasi-allthread in plaster of Paris for a waste core. Setting expansion of the p-o-P provides clearance. Mold the body thereon in wax. Proceed as in lost wax process.

    Cheers,...
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    Cool. Thanks. Cheers, Joe

    Cool. Thanks.

    Cheers,
    Joe
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    If the shape permits (hint: post a picture of...

    If the shape permits (hint: post a picture of your pattern), I would use a two-part mold to include the top surface as confined. Set the top surface sloping upward toward a riser. After casting, cut...
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    From a Tech Brief that I've misplaced (of...

    From a Tech Brief that I've misplaced (of course), NASA found that India Ink was best for final polishing AL. Probably for the Hubble telescope mirror.

    Also, what they said.

    Cheers,
    Joe
  16. Many years ago, in his Mathematical Games section...

    Many years ago, in his Mathematical Games section of Scientific American, Martin Gardner described a "hatchet planimeter," which was a simple hatchet with a tracing point at the far end of the...
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    Simplest way to bend is to not bend.:D If the...

    Simplest way to bend is to not bend.:D

    If the corner are all 90 degrees, I'd use extruded AL angle as inside backers at the corners. Use pop rivets for connections. Beware the choice of rivet...
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    Set a straightedge tangent to the 60mm holes....

    Set a straightedge tangent to the 60mm holes. Measure to the far side of the 83mm holes. As long as you're measuring to like locations, measuring to such locations is more accurate, and more precise,...
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    If you have the part in hand, simply transfer...

    If you have the part in hand, simply transfer drill into the workpiece. Estimate the central cutout beforehand; "clamp" with hot-melt glue. Warm in an oven to release afterwards.

    Cheers,
    Joe
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    Chain Oil

    For an alternate method of storing chain saws, take a look at pic5 in message #4 here: http://www.woodworkforums.com/f8/chainsaw-use-revisited-47976/

    I drain the oil, and attach cutoff plastic...
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    I used a wood dowel to measure the internal...

    I used a wood dowel to measure the internal threads on my wood lathe, similar to MC900. No specifications I'm aware of. I shaped a very long taper, and wound it into the hollow spindle as far as it...
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    Ray's not wrong (wheelinround). Drop forged -...

    Ray's not wrong (wheelinround). Drop forged - same as the female end of socket extension bars. Examine one with a magnifying glass; I just did.:wink:

    Broaches need to pass through the work.
    ...
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    Before committing major surgery, I'd consider...

    Before committing major surgery, I'd consider some less heroic efforts. As noted, total area is more important than shape.

    1. Modify the latch so that it leaves the lower door ajar, but not loose...
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    The search engine can't find three-letter matches...

    The search engine can't find three-letter matches or less, because there are too many three-letter words. Try a more elaborate keyword, e.g. spelling out one of your terms.

    Cheers,
    Joe
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    More here:...

    More here: http://www.woodworkforums.com/f170/drilling-square-hole-142303/

    Same link as kraits BTW.

    Cheers,
    Joe
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    I wish you could do a picture too. But if I grasp...

    I wish you could do a picture too. But if I grasp it anyway, diagonal braces (in an X-pattern between the upper and lower outriggers) would increase the stiffness. One diagonal brace between the...
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    The HP-41CV had 4 removable modules with packaged...

    The HP-41CV had 4 removable modules with packaged programs or DIY storage, an auxiliary card reader ("cards" about 10mm x 50mm magnetic) for storing DIY programs, and a printer (thermal I think) with...
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    Most of the above, except the longest slide rule...

    Most of the above, except the longest slide rule I've used was 24". In olden times, maths classrooms had jumbo slide rules for instruction, mounted above the chalkboard (also a relic I suppose)....
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    No picture, but a worthwhile modification to a...

    No picture, but a worthwhile modification to a removable tailgate ramp. The hinge pins are usually the same length. Which means a 2-man task to re-install. Grind about 4mm off the end of one of the...
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    The "pull-down" (so called) of 8mm film is half...

    The "pull-down" (so called) of 8mm film is half the pitch of 16mm. So there are double the number of sprocket holes per inch (or meter). And woe betide the lab that slits 16mm footage thinking it was...
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    I'm not sure if this will help, because features...

    I'm not sure if this will help, because features and availability seem to be in a state of flux.

    The Dremel router base for overhead routing, #230 (not 231), engages the collar of the tool without...
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    I would make a jig consisting of a sheet of...

    I would make a jig consisting of a sheet of plywood, with two short strips of flat 10 x 3 attached Northeast of the hole location, to form stops. Clamp the jig to the drill press table, and make some...
  33. Thread: sharp bend

    by joe greiner
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    The "sharp" bend you seek will be limited by the...

    The "sharp" bend you seek will be limited by the minimum safe bending radius to prevent cracking, as Stuart indicates. This is generally on the order of several times the sheet thickness, and there's...
  34. I doubt that they're rust holes at all. It's very...

    I doubt that they're rust holes at all. It's very unusual for rust to form so precisely. More likely, they were drilled to make it an exact weight. Before proceeding with "repairs," weigh it to...
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    Please check your measurements and/or unit...

    Please check your measurements and/or unit conversions. Your brief is more appropriate for an overhead crane.

    Cheers,
    Joe
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    Nibbler

    Nibbler for tight curves. Like some of these near bottom of page: McMaster-Carr

    Cheers,
    Joe
  37. It might have been a previous upgrade of software...

    It might have been a previous upgrade of software (VBulletin), now upgraded further. The AAW forum has that feature, and I find it underwhelming - needs a second click for full window.

    Cheers,
    Joe
  38. The corners are the expensive parts, and a small...

    The corners are the expensive parts, and a small window has only slightly less material. Even worse if you need operating sash (double/single hung, jalousie, etc.).

    As far as being unable to make...
  39. Thread: loctite?

    by joe greiner
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    Try moving to a sacrificial scrap when you shut...

    Try moving to a sacrificial scrap when you shut down the router, to let the sanding disk serve as a brake. The resistance will tend to tighten the disk instead of allowing rotational momentum to...
  40. Thread: loctite?

    by joe greiner
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    If there's enough room on the thread, consider a...

    If there's enough room on the thread, consider a jam nut; full height if possible. If the disc hub is round, you'll probably need to grind two flats for wrench purchase. And if there's insufficient...
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    Pack it with sand before bending; plug with corks...

    Pack it with sand before bending; plug with corks if necessary. Shake out afterwards.

    Cheers,
    Joe
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    Around here, lead is considered hazardous waste....

    Around here, lead is considered hazardous waste. Tire dealers usually replace old balance weights on new tires, because the clips don't work well a second time. They're usually happy to give the old...
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    Looks like a solution in search of a problem. ...

    Looks like a solution in search of a problem.

    But some of the neighbor videos are cool.

    Cheers,
    Joe
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    A lady co-worker (a non-engineer) once asked me,...

    A lady co-worker (a non-engineer) once asked me, "How do they [whatever it was]?" I reckoned it would take about half an hour to explain, and that after a few seconds her eyes would glaze over. So I...
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    cobalt

    Use cobalt drill bits. Google is your friend.

    Cheers,
    Joe
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    Signatures, avatars, and other profile...

    Signatures, avatars, and other profile information affect all of your posts when changed - past, present and future. Makes for some really weird references in old posts.:D:rolleyes::oo:

    Cheers,...
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    The bend (deflection angle) is properly measured...

    The bend (deflection angle) is properly measured between the tangents. Looks like about 85 degrees.

    [Drawn freehand in MSPaint. Unreliable]

    Cheers,
    Joe
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    If the legs are short enough, use an adjustable...

    If the legs are short enough, use an adjustable bevel (like this: Squares & Bevels - about half way down the page) to set the angle, and a protractor to measure.

    If the legs are too long for...
  49. Google [ice tongs] for some pictures. If you add...

    Google [ice tongs] for some pictures. If you add a short chain between the handles, a regular crane hook can engage the chain for lifting. There are similar contraptions for lifting sheet steel...
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    For long grips especially, correct tension is...

    For long grips especially, correct tension is achieved by stretching the bolt. The spring washer thus is the weak link, or softer. And thanks for the link to the NASA studies, which I'd lost track...
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