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The logic behind segmented coils is to keep down the potential difference between windings. Let's say we want 20kV off 20000 turns over ten layers - so that's 2kV per layer - if we wind one layer perfectly (good luck with that) over the other by the time we get back to the beginning of the...

Yarwellnofine. You have to be a Serthafrikan to understand that. Welcome to the forum Regards, Ken I - In Cape Town

I never thought to list them but here goes from Left to Right Knurling Tool (under over rollers medium diamond knurl) Carbide insert square tip neg/pos configuration @ 45° - chamfers and roughing Carbide insert triangular tip neg/pos configuration @ 90° - normal machining to shoulders. HSS hook...

Based on an idea I saw elsewhere on the site (but I can't find it to give credit to the author) I did this. The LH image - A bunch of my QC lathe tools are perched on top of the headstock - I have a wooden tray there for oddments but it is cluttered with QC holders and it is quite difficult to...

Similar to post above - here's a design I came up with for changing the timing between two driven shafts for an industrial application. The two main shafts are also slightly adjustable in the pitch between axles - hence the floating idler gears each constrained in its own orbit about its sun...

I normally use #60 & #80 but for thin metal edge - #120 is a good choice. My machine states "Powerful 550W Motor" = hyperbole - Its just 550W or 2/3 HP no more no less. As per Chazz's comments just be sensible and never overload it and keep an eye on the motor temperature during protracted use...

Slightly off topic - A Tip and a safety caution. I found changing the self adhesive disks to be a major PITB of tiresome peeling, tearing and scraping - then I got the bright idea of heating it with a heavy butane torch - while it was running - great idea - the disk simply flew off. Cool - no -...

David, If you look at the first image in that link, there's a table for the disk and a stop bar for the belt which doubles as a small rest when the belt is vertical - I have that machine but the Ryobi version pictured in prior post. No problems with belt size or quality abrasives - just don't...

Lloyd, I might have gone off at a tangent - On re-reading you are trying to size a generator to drive a heat pump ? You would need to see the tripping curve of the generator's circuit breaker compared to your heat pump's demand curve and not exceed that. There is a "quick and dirty trick" to...

Most electrical breakers have a "curve" and other ratings you can look up from the manufacturers - typically to accommodate "inrush" for motors and such. A 15A breaker will hold 15A all day but 20A load might take 20-30 minutes to get it to trip out and 30A might be 10 seconds - this is usually...

Most single phase machines have an unloader bottle - a reservoir that exhausts when it reaches pressure. Sometimes this reservoir is just the volume of the discharge pipe between the compressor and check valve entry to the pressure vessel. This volume discharges when the motor is switched off by...

Just been to see a knee doctor (like an hour ago) and I am going to need a pair of those myself sooner rather than later. Glad to hear it went well and you are up and about again, Regards, Ken I

Very pretty - looks like you mixed and matched Gerry's plans and some of my metric alterations - plus a whole bunch of your own interpretation which ended with a very fine model - well done. Love the flywheel, control valve, wooden barrel insulation and the bolted frame - gorgeous. Regards, Ken I

Photos of what you are doing might help us - and stop us asking stupid questions about the obvious. Like - have you removed the retainer nuts at the rear ? Is the front end an opposing pair and the rear end an "outrigger" in which case there will be an internal retaining/adjusting nut. etc...

I'm going to take a flyer on this one - my experience with Chinesium is that they will put in anything that fits. I'm guessing those are supposed to be "deep groove" ball bearings which can handle moderate axial thrust and they have used a shallow groove of the same dimensions. Look up the...

Lift the XY co-ordinate for each hole from your CAD model and pitch it out - if you can rely on your screws. You can copy your model centre to 0,0 on your drawing then "list" the selected holes and "print" the list. Since working towards the lash can be problematical you can set your 0,0 in...

If I read something that irks me into typing an immediate response - then as my fingers fly to the keyboard, my internal moderator says Woah! That is a sure indicator that I should refrain from posting and I wait a day or so to see how others respond before jumping in. At least 50% of the time...

A caution - Beryllium was often used for Gyro flywheels. Beryllium is used in aerospace applications as it is stronger than steel and lighter than Aluminium, electrically conductive and has no fatigue mechanism (inside its elastic limits) so it's good for conductive springs and such. However...

I normally work from my own designs, even when working from plans I normally redraw them - this gives me the mental process of how I'm going to machine them and in what order. With complex parts, I will normally do a sequence of machining stage drawings - like block up, main holes etc. etc. that...

I had a similar experience :- Chinese ? Junk ! What bothered me was it was very well made junk - I suspect that the manufacturers failed to grind their mounting hardware every time it was mounted. (Batch-wise manufacturing with frequent tool changing). Obviously this "wears" the tooling out...