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A counterweight on the back end of the ram might get rid of any sag as well.

As a self taught toolmaker, one of the jobs I had after about a year of time was making an approximately 12" matched bore with a stepped shoulder on the mating part. With inside or outside micrometer that big I made the uncritical bore to tape measure size and then made an outside caliper like...

I had a similar opinion, a cheap set made by General was much tighter and smoother, the Starrett set had machining marks in the slot that made it feel 'lumpy'.

Admittedly it was at higher rpm, but way back when points were use on racing engines, point float was an issue, maybe the same issue here.

I'd argue the repairability is a secondary concern to ease of manufacture. At one point I thought I could be a car salesman, but I couldn't bring my ethical standards low enough, and in the mean time, learned a bit about the fun of repairing cars. I had worked on cars in the 60s when you could...

Agreed, I have too and for infrequent and uncritical applications like starting a miniature engine, it doesn't take much of a belt and pulley.

Meehanite is a trade name and according to the corporation, "Meehanite® metal is a family of different types of superior engineered cast irons, including nodular iron, flake graphite and white cast irons. The key to the undisputed success of Meehanite® metals is the rigid application of its...

The files are good, but they try to reconfigure my installed Alibre if I try to open directly from file explorer, I had to open them only through Alibre.

Doesn't the forum allow .zip files? 7zip is free and available for Windows/ReactOS, BSD, macOS, Linux

Cyanoacrylates, like Loctite don't work well on aluminum unless a primer is used, maybe that's the solution.

If you need cast iron/ductile iron, the one of best places in the Greater Toronto Area is Terra Nova Steel in Milton, they aren't as quick as Metal Supermarkets but they are major distributors of the material as well as bronzes and will cut to length and ship. BTW, McKinnon Metals in Woodbridge...

Wow, Grainger is less expensive than Speedy or Online? In Canada, Grainger prices are usually 3-4 times anyone else.

That is what I did on my TOS FNK25 with a two speed motor, though most turret mills, Bridgeport and their clones, don't have two speed motors. Even at 120Hz it was still running at only the high speed range speed.

I've had a VFD wired into the low speed of the motor, on a step pulley turret mill and usually had the pulley on the low speed of the high range. If you have it there, you can usually do most of what you need but occasionally will have to go into the low range for large taps or large mills and...

FWIW, and not suggesting anyone else do it, but when I was younger and at least thought I knew more, I used to braze automotive fuel tanks. Granted, it's not welding but it has some relevance. Where I lived had no paved roads so car fuel tanks were pretty beat up along the leading edge from...

The Ruston-Hornsby single cylinder diesel in the grain elevator my father managed had the same paper glow plug, from memory, it was a tightly wrapped cylinder of paper about 1/4 to 5/16(6-8mm) in diameter x about 2.5 inches(63mm) long and was fitted in a plug that was drilled on the piston end...

Methylated spirits 'denatures' ethyl alcohol by adding 10% methyl hydrate/methanol to it. Methanol/methyl hydrate, available at most Canadian hardware stores, is ASTM purity grades A and AA, both are 99.85% methyl hydrate.

To anneal A2 it is heated in a controlled atmosphere furnace at a rate not exceeding 400°F per hour (222°C per hour) to 1550°F (843°C) and held at temperature for 1 hour per inch (25.4mm) of maximum thickness; 2 hours minimum, then cool slowly with the furnace at a rate not exceeding 50°F per...

FWIW, taps come in different sizes, there is an 'GH' tolerance designation on ground thread taps that designates the oversize in 0.0005 increments. A normal/standard tap is a GH3 which is 0.0010 to 0.0015 oversize. Also, there are steels that will shrink or grow, some shrink/grow more than...

Admittedly they were different but I've rebuilt Bridgeport, my Excello 602 and a 15 horsepower, 8000 rpm spindle, all had angular contact bearings at the spindle nose and a floating angular contact pair at the tail of the spindle. Someone with much more experience at spindle rebuild than I, said...