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Member postings for John Reese

Here is a list of all the postings John Reese has made in our forums. Click on a thread name to jump to the thread.

Thread: Square thread cutting
01/04/2020 21:09:40

To answer the original question: A grooving tool us not suitable for cutting square threads because there is insufficient clearance on the leading edge of the tool. The clearance on the leading edge must exceed the helix angle of the thread.

Thread: Toilet roll hanging
29/03/2020 15:45:58

Caving in to the wife?

Thread: Possible machine hoist?
29/03/2020 15:44:51

I have a hoist similar to David's. Mine was intended to attach to the hitch receiver on my pickup. I plan to make a short pipe pedestal that mounts to the floor and just drop the upper part of the hoist into the pedestal. It will be placed near the corner of my 16" lathe headstock and will be used primarily for handling chucks (8" dia).

Thread: T slot cutter of woodruff cutter?
04/03/2020 04:32:00

In that application I think a Woodruff cutter would work quite well. If a T-slot cutter is available in a 6mm width it would also work quite well. The process I am visualizing is this: cut the 20mm slot to 8.5mm depth first, then do the undercuts one at a time using either the woodruff cutter or an appropriate T-slot cutter.

Thread: What does diamond turned mean?
04/03/2020 04:24:51
https://www.youtube.com/watch?v=sFrVdoO
hu1Q
This is Dan Gelbart's precision lathe for diamond turning.
Thread: Hand Wash
04/03/2020 04:17:17

Alcohol based disinfectant is effective against bacteria. It is not very effective on virus (what the hell is the plural of virus) because of insuffient concentration and time of contact. I agree that hand washing is he most effective.

On my last cruise there were hand washing stations at all the entrances to the buffet. They had a minor outbreak of norovirus during the cruise. Hand washing was mandatory for entering the buffet in addition there was hand sanitizer. The crew was doing extra scrubbing, cleaning, and disinfecting in all the food service areas. Passengers were no longer permitted to self serve from the buffet. Crew members prepared the plates and handed them across the counter. That was done to prevent passenger to passenger transmission of the virus via the buffet line.

Thread: Deep hole "D" bit advice needed.
27/02/2020 05:15:23
Posted by vintage engineer on 24/02/2020 23:53:37:

Shaped charge explosive?

The hole would be bell mouthed.

Thread: rolling brass strip in the lathe
14/01/2020 22:42:35

You could probably roll it around a mandrel like winding a spring. I think a simple roller on the toolpost would work to form the dtrip to the mandrel.

Things to consider"

Are you roiling it the easy way ao the hard way? If the hard way the material may try to twist.

Allow for spring back. The mandrel will have to be undersized.

You will be rolling a helix. Can you fet it flat enough afterwards?

Does your lathe have the balls to pull it off?

Thread: Can anyone recommend a cutting disk for cutting aluminium?
13/01/2020 21:45:04

Triple chip saw blades are great for Ali. Actually almost any wood cutting blade works.

If you areusing an abrasive disc on aluminum select silicon carbide abrasive, commonly used in concrete. The AO discs have strong grains that don't fracture and break away hence the load up and quit cutting Ali. SiC blades have very sharp grains that are brittle and break down in use. That keeps fresh abrasive exposed.

13/01/2020 21:39:37

I have an Evolution Rage3 that is intended for metal cutting. The primary fratures of the blade are negative rake and a depth of cut limiter ahead of each tooth. I wanted to put a fine tooth wood cutting blade on the saw. The blade was a 5/8 bore and the saw has a 1" arbor. I set the wood cutting blade on 1-2-3 blocks and clamped it down. I indicated on the center hole and started boring until I got to 1".

Thread: Converting guillotine from manual to air power.
13/01/2020 12:32:31
Posted by David George 1 on 12/01/2020 09:08:38:

Have you thought of using an Air oil converter to make hydraulic pressure which is more controllable. You just need a double cylinder with air pressure to compress the hydraulic oil which in turn operates the cutting cylinder.

David

Definitely air over oil. Throttle the oil going into the cylinder.

Thread: Timesaver lapping compound quandary
09/01/2020 02:07:01

Does this help?

Timesaver comound

Thread: New legislation that could affect us all.
09/01/2020 00:48:56
Posted by Grindstone Cowboy on 08/01/2020 10:41:45:

ISO 100-R011 - at last, something to make people do it the correct way. Which is, of course, paper feeding downwards from the wall side.

Edited By Grindstone Cowboy on 08/01/2020 10:42:38

NOOO I hate trying to pick up the end of paper from the blind side of the roll. That damned standard must have been written by women.

Thread: Have a look at this, view from the chuck
09/01/2020 00:44:40

The camera lens was eccentric as was its owner.

09/01/2020 00:43:25

Gave me vertigo.

Thread: Looking to buy a better toolpost
05/01/2020 23:58:27

Go for the Arc provided its dimensions (dovetail is most important) are close to those of Aloris. They are quite forgiving of the dimensions of the dovetailed tool holders while still giving excellent repeatability. Extra tool holders are very inexpensive. The Warco style requires the Vs be precisely spaced and parallel for repeatability. I doubt the Asian manufacturers will maintain the level of precision to allow you to buy replacement tool holders that fit properly.

Thread: Jones and Shipman boring head
05/01/2020 23:45:02

Can you find a face mill adapter with a big enough flange? You may have to run the bolts into tapped holes if there is no space for a groove for the thin nuts.

Thread: Keyway Broaching
05/01/2020 03:24:58

I do my broaching on a 3 ton arbor press. Before I had the arbor press I used the spindle of a 21" Royersford camelback drill press. Your frirnd's hydraulic press should work beautifully. Be sure to back off thr ram periodically to allow the broach to re-seat itself in the but. That will prevent the broach leaning outward and resulting in a tapered keyway.

Thread: Alexander master toolmaker
05/01/2020 03:16:14
Posted by David Colwill on 22/12/2019 07:48:37:

On some tapered gib arrangements there is a screw on each end of the gib. These are used to keep the gib from moving once set. If it isn't properly held it can act as a wedge and I would suspect that this is what is happening on your machine. Try to find out how the gib is secured and back it off. If that frees it of readjust and try to look for movement of the gib when moving the slide.

Regards.

David.

If the gib had only one screw it was common practice to have a slot in the head of the gib that surrounded the head of the screw. That prevented the gib from moving inward and locking the slide. It id possible the head of the gib was broken, losing the slot.

Thread: How to lubricate pulley shafy bearings?
05/01/2020 03:02:06

In all probability the screws are Whitworth. If built in England it would not likely have UNC threads. If you want to use UNC the proper designation would be 10-24. The 3/16-24 was a stove bolt thread that went obsolete many years ago, about when coal stoves in kitchens fell out of favor.

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