Search results

Always my understanding that rolled threads had higher tensile strength, never really thought about hardness as such. Interesting.

As with many things it comes down to the use of the machine, and the facilities available to the OP. If the machine is only in occasional use then an insert has the advantage that it is quick and easy to do with minimal tools necessary. It will give a stainless thread which might be better at...

One big issue with the Helicoil option is going to be cost. A kit is probably going to be £50+, based on for example M20x2.5, unless you can find someone to do it for you who already has a kit that size. Would be quick and easy, but not particularly cheap. The bush option is going to be cheaper...

Fair point, although I would think an insert would be ok if properly lubricated, moly or graphite based grease maybe? Or graphite powder if you don't want the thread to collect sawdust.

Old trick when laying it is once it is tamped and levelled drag a length of the narrow DPC strip across it. You need two people. Just pull the strip tight curling the leading edge up slightly like the front of a ski. Then drag it over the surface. Gives a very smooth finish, almost as good as...

Another vote for Helicoil. You will probably need to buy separate inserts as the ones that typically come in the kit are fairly short. Looks like your thread is quite deep. I know some people who have "stacked" short inserts to get a deep thread, but probably not to be recommended. I would...

Agree, soft start and braking useful but probably more for a lathe than a drill. And you are absolutely right, I suspect most people rarely move the belt. I think it was just about belt change versus variable speed if you do want to change the speed. Personally I am fortunate to have a few...

When I used to be whipping engines in and out one of the best gadgets was a tilting beam that allows you to alter the tilt of the engine relative to the crane, then lock it in that position. I'm guessing 1960's bit of kit made by Churchill, picked it up at a clearance auction of a big dealership...

Wow, that is very comprehensive! I saved a bit in that I already had most of the screws etc, I think the only thing I had to buy on that front was the spax flooring screws for the walls. I had an existing concrete pad from an old building, solid although the surface is just roughly tamped but ok...

Soft start, and braking both handy features with a vfd. I fitted a modern metric motor to my old lathe. As you say had to bore out the original pulley and cut a new keyway. Not a problem if you have the kit, PITA otherwise. In my case it was just because the second hand metric motor was really...

I have an I beam across the middle of the main space in my big shed, and an old chain block running along it on rollers. Great for lifting stuff. When I got my milling machine I lifted that off it's pallet using the chain and plonked it on a hydraulic scissor lift. Then just wheeled it over to...

Looks very nice. I am always amazed at the prices of as it were "off the peg" wooden buildings, usually pretty flimsy too. Far better to do it yourself. My latest is 4.8x3.6m external. 4x2 frame, membrane, battens and featherboards outside and T&G chipboard flooring boards inside. Roof membrane...

That tap wrench looks to have turned out really well. Haven't done anything with electrolysis for years, might have to revisit it.

But in your example 20hz at 200 rpm you have massively reduced the torque just when you potentially need it most. So I agree that a vfd can be useful in fine tuning the speed within a given gear range, but 200 to 2000 is a bit of a stretch if you want to maintain torque, especially when you have...

Very nice. Making your own always worth considering making the very tip parallel, reduces the chances of it camming out.

Don't do it! Different grease, all you will probably do is cover the inside of the dishwasher with gunk. And she will most definitely know :-)

Couldn't agree more. No problem with using a vfd to run it but you want the torque to increase with slower speeds, exactly what you get from moving the belts. Using variable speed from the vfd to slow it down does exactly the opposite. So use a vfd by all means to be able to run it off single...

A friend of mine works at a local fabricators, and has made all sorts of stuff for me. He is only about ten years younger but has no idea at all about imperial, just young enough to have never used it. I find myself doing stuff in imperial in my head, then having to convert it to metric. Just...

Mine is a generic Chinese job from e bay, not sure it has a brand name. It's a stand alone unit, so small microscope head on a roughly 1m lead linked to a 7 inch screen. The head has variable magnification. It came with a stand , but that was not much use as it obliged you to have the item...

I have a Wolfcraft one, very similar but also has a handle on the side of the base. Had it for years and very useful. Mine has no chuck but a clamp to take the standard size drill end mount, so also can be used with my old 1/4 Bosch router, or most corded drills.