Member postings for methusala

I have a warco 918 lathe,and have an er25 collet chuck, I also have m3 x3/4collet. one day when using

m3 collet , I for some reason (tried) to put the face plate on the lathe. I found that it wouldnt screw on, but on removing the collet it went on with ease. Now every time I use m/t collets I screw the face plate on to stop

any distortion of the thread. I should imagine this could be a problem with other similar lathes.

When I need to cut 16 &18 gauge material on the bandsaw, I put double sided tape on to scrap pieces

of 6mm mdf board or plywood and stick the material to that. It works a treat.

Hi Neil,

Have you tried j.b. cutting tools., I bought some small i.e. .110 dia shank and.156 to tool tip

boring bars from them in the past. you would have to make a special holder for them as

they have a near eliptical shaped end on them. Total lenght of bar is just over 1.125

with the working lenght being .625.

Edited By methusala on 06/06/2013 09:16:35

Ian, Way back in the eighties I worked for a firm that produced components for the

oil industry. These were manufactured from titanium and had numerous tapped

holes ranging from m3 to m6, and as you can imagine we had a heck of a job

tapping them. The firm got a rep in from a specialist firm for advice, and he reccomended

the two stage taps. It was still a "cork in the bottom " job to tap them, especially the m3

but it was definitely a lot easier.

Colin

Alf,

I agree with Graeme on the size of the tapping drill i.e 5.2mm, if you have difficulty

tapping titanium you could try using 2 stage taps.

As an aside you can also electron beam weld titanium, but it would be very expensive

Colin.

Hi All, I have just come across a metal finishing and processing company

based in Camberley, Surrey. they will do work for the general public and

more importantly supply material with no minimum order. I have no connection

with this company, and hav'nt done any business with them (yet)

their web address is www.shop4metal.com

Colin.

P.S. sorry for the double spacing ,the computer is having a bad day.

Hi All, I have just come across a metal finishing and processing company

based in Camberley, Surrey. they will do work for the general public and

more importantly supply material with no minimum order. I have no connection

with this company, and hav'nt done any business with them (yet)

their web address is www.shop4metal.com

Colin.

P.S. sorry for the double spacing ,the computer is having a bad day.

Before I retired my work involved a lot of siler soldering, we used sodium bi sulphate

(sodium hydrogen sulphate) as a pickle. It would start to dissolve the tops of screw threads

if left in the pickle tank for a few days, but as most jobs took only 20-30 mins to pickle

this wasnt a problem. the mix ratio we used 28g to 100g of water, but found that

this ratio wasnt critical. as you say the chemical is used for lowering the ph in swimming pools

the ph plus dosnt work so well. Im sorry but i cant explain why the pickle reacts with the plastic pipe.

hope this helps,         Colin.

Edited By Colin Stewart on 13/03/2012 09:01:54

Hi All, I have a micrometer that I modified for measuring undercuts on turned

components . I m/cnd a 1/16 flat on the anvil, and ground the spindle end to 1/16 dia. x 3/16

long. maybe the above mic was modified for this reason!

hope this helps ,Colin.

Edited By Colin Stewart on 29/10/2011 23:24:57