Member postings for John Reese

There is a problem with small lathes having variable speed drives and no back gear. When you dial down the speed, you do not have enough torque to make a deep enough cut to get under the skin of the casting.

I adapted a Hardinge turret to a South Bend 10K lathe. I managed to get the holes in the turret concentric with the spindle within .001".

On my South Bend 10K and my Nardini 16 x 40 the power feeds are set up so that when the carriage feed is toward the chuck the cross feed is away from the center. I assume the lathe designers assumed the normal facing direction would be from the center outward. I normally face feeding inward so I have to reverse the feed when facing.

My RF45 mill is limited to 1500 RPM with the 4 pole motor supplied. Small diameter cutters work best at much higher speed. I have been considering adding a high speed spindle to use the small cutters efficiently.

I believe they are collets used with the Big Daishowa high power milling chucks. They are a reducer sleeve for use in that chuck.

The DT collets have a clamping range of only a few thou from their nominal size. ER collets in the larger sizes will hold work up to 1mm below nominal. That is a big advantage for holding drills or taps.

There are industry standards for naming axes of travel. Here is one reference I found.

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As an example, suppose you had just forged a chisel and the body of the chisel was above critical temperature. You would quench the end of the chisel leaving the body hot. You would then polish the quenched end so you could see the temper colors. Then you watch the colors as heat from the tool body until you had the desired temper color. At that point you would quench the entire tool to prevent additional heat from migrating to the tempered end.

If the part were tempered in an oven and the entire part was at uniform temperature there would be no benefit quenching after tempering.

My best experience was on the Delta Queen stern wheel river boat. I was able to spend some time in the engine room. The cylinders had a 10 foot stroke. As I remember (after 50 or more years) the HP cylinder had a 24" bore and the LP maybe 48 inches, It was equipped with variable cutoff but that was not being used. The output was controlled by manual throttle valve. Unusual on river boats itcwas a condensing engine. The boiler was a water tube boiler made by Murray Iron Works in Burliington Iowa. I suspect it was a surplus WW1 cargo ship boiler. The hull was fabricated in Scotland and knocked down and shipped to California for assembly. There was an identical sister ship called Delta King. They ran passenger service between Sacramento California and San Francisco. During WW2 they were used by the US navy as yard ferry boats.

Using the shower in the state room was interesting. Hot and cold water supplies were furnished by separate reciprocating steam pumps. As a result the shower was alternating too hot and too cold.

Instead of changing the nipples consider pitting an elbow on your grease gun.

For convenience you might want to try FS Wizard. It is available as an app for I phone and Windows. The limited version is free. It gives appropriate speeds and feeds for a variety of materials and several cutting tools.

The Chinese vendors on eBay offer shell mill adapters wth either metric or Imperial threads.

I use a diamond cutoff wheel in a Dremel. They don't last long but they are cheap.

Stressproof or 1144 is a re-sulfurized plain carbon steel with a nominal .44 % carbon. The sulfur makes it great for machining but not so great dor welding.

JasonB stated the ideal method. It also works for setting a Woodruff cutter or gear cutter on center.

A mnemonic for remembering the order of colors: Bad Boys Rape Our Young Girls But Violet Gives Willingly.

It is possible that the grind was to provide both primary and secondary relief angles. On your reamer the primary relief was ground wrong.

They can also be used to mount a chip deflector.

One can make something similar to this:

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I use the dark cutting oil of the type plumbers us for threading pipe. It is especially good on gummy steels.

I know that bacon grease works very well but any left on the machine or the chip pan will go rancid.