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  • Time_and_Turning commented on darrenah's instructable The Workbench With a Secret!2 days ago
    The Workbench With a Secret!

    Very clever, I'm considering retrofitting a bench this way.I would make one suggestion: when drilling pilot holes in pine and other soft materials, use a bit that will yield a 75% thread, that is only the outer 75% of the threads engage in the material. In hardwoods, such as maple, oak or walnut, or other hard materials use a 50% thread. I may be misinterpreting the diagram, but it looks like it calls for a 100% thread.Tables for various kinds of holes and screws are readily available. If you don't have the exact size bit, select one between the 75% and 50% threads.Depending on the screws and material, undersizing the hole risks a jammed screw, the slot stripping out, or the head twisting off. Just last night I discovered that the person who fastened my kitchen table top to its base und...

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    Very clever, I'm considering retrofitting a bench this way.I would make one suggestion: when drilling pilot holes in pine and other soft materials, use a bit that will yield a 75% thread, that is only the outer 75% of the threads engage in the material. In hardwoods, such as maple, oak or walnut, or other hard materials use a 50% thread. I may be misinterpreting the diagram, but it looks like it calls for a 100% thread.Tables for various kinds of holes and screws are readily available. If you don't have the exact size bit, select one between the 75% and 50% threads.Depending on the screws and material, undersizing the hole risks a jammed screw, the slot stripping out, or the head twisting off. Just last night I discovered that the person who fastened my kitchen table top to its base undersized the pilot holes. Out of six #12 wood screws, I had two without heads, and the others had stripped out and unusable Phillips slots. Fortunately, since this was an emergency, the extractors I had worked flawlessly.P.S. Don't use cheap screws. The cost savings aren't worth the aggravation when one or more fails.

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  • Time_and_Turning commented on tomatoskins's instructable Make a Wood Tap From a Bolt2 weeks ago
    Make a Wood Tap From a Bolt

    I have done this, and similar things. But perhaps I misunderstand: If the hole to be threaded is drilled just smaller than the minor diameter of the threads, it isn't a clearance hole. You want a hole sized to produce a 50% thread in hard materials, and a 75% thread in soft materials. Tables for easy fit clearance, tight fit clearance, and tap holes are readily available for various standard thread sizes. Practically speaking, in wood anything between 50% and 75% would work. Aim for the larger hole if you intend to use glue on the threads, especially if the selected glue expands as it cures.Whenever possible, use a drill press, or a lathe as a horizontal boring machine. You turn the spindle by hand; the machinery keeps it all aligned properly. You may have to give the forward feed a lit...

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    I have done this, and similar things. But perhaps I misunderstand: If the hole to be threaded is drilled just smaller than the minor diameter of the threads, it isn't a clearance hole. You want a hole sized to produce a 50% thread in hard materials, and a 75% thread in soft materials. Tables for easy fit clearance, tight fit clearance, and tap holes are readily available for various standard thread sizes. Practically speaking, in wood anything between 50% and 75% would work. Aim for the larger hole if you intend to use glue on the threads, especially if the selected glue expands as it cures.Whenever possible, use a drill press, or a lathe as a horizontal boring machine. You turn the spindle by hand; the machinery keeps it all aligned properly. You may have to give the forward feed a little assist if the threads are not sufficient to feed the work by themselves. It wouldn't be a bad idea to use those machines to aid in grinding threads off leaving a smooth shank.

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  • Time_and_Turning commented on Victor805's instructable Make Golden Coins (really Easy)2 months ago
    Make Golden Coins (really Easy)

    Cool. So with the addition of heat, you're causing the zinc and copper to dissolve into each other creating brass. I wonder how this process would work with current US coins. Since 1982 with the exception of 2009 the one cent piece (penny) has been copper plated zinc. Since 1965 dimes, quarters, halves and large format dollars have been 'sandwiches': the obverse and reverse sides are layers of cupronickel (75% copper, 25% nickel, traces of manganese) on a pure copper core, which is visible on the edge of the coins. Nickels have been pure cupronickel since 1946. I don't know about more recent dollar coins such as the Susan B. Anthony and Sacajawea. Newer dollars seem to have a shiny or matte yellow surface.Unfortunately, I will not be able to perform the experiments in the near future.

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  • Time_and_Turning commented on Paige Russell's instructable 10 Unusual Uses for Pencils3 months ago
    10 Unusual Uses for Pencils

    The soviets were good at making virtues out of necessities. On the other hand, the americans benefited greatly from spinoffs of the 0g pen research, in more ways than just the consumer level ballpoint pen that wrote upside down.For that matter, that megabuck made it's way into the pockets of more than a few regular hard-working employees.In a previous life, I ran a consulting company. SDI money from the feds to my clients enabled that company to survive.Sorry, I sorta got on a soapbox. I'll stop now. These 10 are indeed clever uses for ordinary pencils.

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  • How to Re-Engineer Paper Back into Wood

    The vast majority so far has been wood: hardwoods and softwoods, seasoned or green. I did some experiments on tagua nuts (vegetable ivory), and a chunk of beef bone I filched from my ex's dog.I have a banksia pod that was given to me a long time ago. Every so often I pick it up, shake my head, and put it down again. It's time will come, though. 'Real Soon Now' I will start some experiments with acrylic blanks, and I'm making some contacts with suppliers of fordite.

    I'm thinking I will try this at some, but as I have a large supply of quarter-usletter paper, I will try making it flat in a press. Yes, the original cellulose has been broken, but like particleboard, chipboard, flakeboard and other manufactured materials, the product will be mostly glue. Since my intention is to make turning stock, I will probably use a water resistant glue, so the final object can be washed, if not immersed.

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  • Time_and_Turning commented on ChristinaTapp's instructable Fun with Wine Bottles9 months ago
    Fun with Wine Bottles

    sgbotsford has anticipated my questions. I've found that SiC wet or dry abrasive papers on glass, MDF or HDF works fine; once the sheet is wet it doesn't move around, unless one is too exuberant and lifts an edge. This technique also works for fettling planes, getting a wickedsharp edge on various tools (plane blades, chisels and such) and flattening oil and water stones.It's also less messy, and I can use tools and materials I already have, rather than invest in new stuff, which has to be stored and kept track of ...I haven't done flame polishing on wine bottles and such; just Pyrex, Kimax and random flint glass. It would be nice to know if there are any additional risks to that

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  • Standing Desk Pulley Lamps

    A really nice idea, beautifully done. A question: would a clear spray lacquer or similar solve the problem of spot tarnishing from fingerprints? If you considered it but decided against it, what were the reasons?

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  • Time_and_Turning commented on carl5blum's instructable Radial Saw Up-Grade1 year ago
    Radial Saw Up-Grade

    Some very good ideas here. I might 'steal' the blast shield/dust collector and pegboard ones next time I need a sacrificial top for my RAS.Pegboard is pretty good in terms of consistency of the centers of the holes for linear work. although for really precise work I'd worry about wear in the holes and consistency of the pegs.For angles, a lot depends on the kind of work you do. Sometimes I make up segmented rings for making into bowls. For example, 9 segments times 1/2 degree off is 4 1/2 degrees, which is more than enough to keep the ring from closing.

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  • Time_and_Turning commented on agabpardo's instructable How to Dim a Lamp 1 year ago
    How to Dim a Lamp

    This is a fine idea; photographers have been filtering their lights since they became available. But:This is a fire hazard. Compact Fluorescents run cooler than incandescents, but still generate enough heat to be uncomfortable to touch (45-50degrees C) and that will, given enough time, ignite the towel/filter.Do not try this with halogen lamps, even with infrared absorbing glass.

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