Member postings for Emgee

Martin

The tapping drill size for metric fixings can be calculated simply by deducting the pitch from the diameter.

The difference in tapping drill sizes you have found may be due to different pitches, an M8x1.25 requires a tapping drill of 6.75mm where an M8x0.75 needs 7.25mm.

Emgee

Overload size depends on the motor FLC, usually stamped/printed on the motor plate.
This is listed in Classifieds.

Edited By Emgee on 16/10/2019 23:38:41

John, at 10,000 revs perhaps the toothed belt drive system is contributing to the vibration issue.

Emgee

Hi Hans, think you missed the date of Neil's post, sept 2018.

Emgee

+1 for Eric's suggestion

Emgee

Hi Kiwi Bloke

7075 is an excellent material with a better spec than either 6061 or 6082 but at greater cost and not so widely available.

Emgee

Hi Richard, I use very similar method to you but perhaps not as much angle, you have clearly attained the "feel" and your gauges must be working correctly if you get consistent results.

Emgee

Charles

I bought a set of ER25 2-16mm in Dec 2018 for £14.99 from worldtrade100

I needed an additional 16mm at the time and saw these when searching, used it for a 4f carbide cutter roughing out some aluminium, worked OK.
Have checked some other sizes and they appear to be as accurate as indicated in the listing.

Emgee

Graham, Olivers, ETA's and many other top performance motors of that era had castings for the case which usually provided good support for the running components.

As others have said IMO 6082T6 has the strength you need for the engine mentioned but if you want something with a better spec try 2014A (HE15), usually available at M-metals. Cost of this will be more than either of the other options.

Emgee

Bill, the number and size of the wording on the brass plaque will determine the size required so best start with that and then you may be able to fit that adjacent to the plane profile without adding too much more area.

Emgee

Hi Douglas

Pretty sure you will be able to find a much better deal by moving, you don't say if you are on fibre but you are certainly paying fibre rates.

Emgee

Dave

I believe your'e a bit off the mark with a 5 ohm earthing point, that's about 10 times what you would expect from the worst case incoming supply, either PME or sheath earthing.

Of course when using an earth electrode as the installation earth it can and will be many times greater but the system shock protection will be provided by an RCCB (Residual current circuit breaker)

Emgee

I changed to a gmail address a long time ago exactly for the same reason, it's available across devices and providers.

Emgee

Colin, you say the electrician is sorting out the house installation but earlier it was stated the lathe is in the workshop, is the electrician now going to treat the workshop as a separate installation with it's own supply, distribution unit and earthing arrangement ?

Emgee

mjj

Did you use ground bars to measure over to obtain the dovetail widths ?

Design concept is good with dovetailed column with tapered gib but if you have .005" difference on width top to bottom then the gib adjustment will only be correct at the point it is adjusted at.

Like others have said I also would have put the cut on with fine feed with the column locked, especially on that machine as the head down handle is placed at the very top of the machine.

Finding ways around any machine defect doesn't help very much with any warranty claim but does highlight the fact that when receiving a new machine it should be checked thoroughly to find any such problems that can be reported immediately to the supplier.
If you are a newcomer to machining the above may not be possible so seek help from an experienced person.

"Buying a milling machine from Warco.
Every milling machine we supply is fully checked and tested by a member of our qualified team, and is supplied with an individual accuracy test report.
As with everything bought new from us, these machines are fully guaranteed"

Above para from Warco's site, did you get an accuracy report ?

I believe if you contact the supplier they will be helpful.

Emgee

Martin

If the tools were very cheap perhaps the steel the chisels are made from is not suitable for through hardening by heating and quenching, only method would be to case harden if that is the case.

Emgee

just spotted the spelling error, no "e" in silicon.

Emgee

Hi David

Keep it lubricated with whatever you normally use on aluminium and if good quality HSS it will remain in good cutting order on most alloys. exception would be high silicone content types.
Flood or mist is sure to keep the gullets clear

Emgee

Hi Andrew

You should get more useful life from carbide tooling on that material, if you can get the correct inserts for the Glanze tool that would be equally as good. Make sure the chips are blown away from the cut so they don't interfere with the process.

Emgee

Edited By Emgee on 06/10/2019 12:28:42