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Member postings for BOB BLACKSHAW

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

Thread: SX2p mill gas struts
25/02/2019 16:37:00

Thanks for the replies.

On the video link a question was asked on what force was used and 150n was given, John used 300n to 400n,and Geoff used 120n.

It seems that the newton force is more important than actual size needed of the strut, you can measure the strut needed for whatever with a tape rule.

Bob.

25/02/2019 13:48:35

I thought ordering this gas strut was going to be a simple task. When trying to order on SGS a newton force is needed, I asked the sales rep, but not very helpful.

I thought that G56 15 220 260 was all that was needed, help needed please.

Bob.

25/02/2019 09:03:40

I will order a 260mm today Ron, as I will be happy for the gap between bed and collet.

But thanks all for the replies.

Bob.

21/02/2019 10:04:53

Thanks for the replies,

The video, he calls for G56 15 220 260, on the thread,Another new mill its G56 15 220 250, any idea of the difference.

Bob.

20/02/2019 10:17:55

I've been trying to find the Thread on a gas strut for the sx2p mill, I've seen it, and a manufactures address was given with the best strut for the mill.

Any help please

Bob.

Thread: Unused Xmas Gift
04/02/2019 17:01:42

Thanks for the replies, its the same as last post Duncans, so will give it a try.

As for the inserts are they standard APMT 1604, how can you tell good from rubbish quality, or is it down to cost, but as stated by Dave, try them first.

Bob

04/02/2019 12:21:11

I was given a face mill with four gold coloured inserts and have not used it as I'm not sure if it will be any use to me.

I have used the one blade type with HSS tool on aluminium and have found it quite satisfactory with good results.

With this face mill if I face steel which is under the dia of the tool would the inserts chip, as I found on the lathe that when turning steel round with a flat the insert chipped.

With aluminium this did not happen as its soft, what minimum size steel can this face mill do with out the inserts chipping.

I would have a go but I don't want to damage the inserts, hope this makes sense.

Thanks Bob

Thread: Milling and drilling slate
18/01/2019 14:59:35

 

I have a piece of slate which is 6mm thick and needs to have some holes drilled, and some small areas 6mm x 20mm for a smooth surface to be milled. For drilling 3mm holes I would of thought a masonry drill using coolant at high speed. Im not sure if I can mill the smooth surface with a end mill or not, any ideas please. For cutting to size will scribing a line similar to cutting a tile will do the job, Im asking as I only have one piece so one chance only.

Thanks Bob.

Edited By BOB BLACKSHAW on 18/01/2019 15:00:44

Thread: Fly press resources
03/01/2019 13:58:53

When doing fine limit sheetmetal work in the 70s most small jobs were done on a fly press. Shop made guillotine, notching tools, punching holes using machine punch and dies, bending small jobs using Promecam brake press tooling, all to fine limits.

If I had the room a fly press would be top of the list, its endless what can be achieved with one with shop made tooling.

Bob

Thread: SX2p mill taper extraction
03/01/2019 13:42:05

dscn0950.jpg

With the SX2p mill to extract the taper the drawbar needs a tap with a copper mallet, over time I know the exact tightening required to hold the taper.

Over time this must do the bearing some damage with the knocking required for extraction.

I made a tool which works well but gives such a crack I am wondering if I will be doing more harm than hitting the drawbar.

Any advice please, Bob.dscn0949.jpg

Thread: Soldering
12/12/2018 04:50:58

As the post is on soldering, have a look on Popular Mechanics and put a search on soldering, and useful information under shop notes are available

A interesting one March 1957, soft soldering wire to pyrex glass and other materials, ceramics etc, I shall give it a go later this week to see if it works.

Im on night work this week and I spend many hours reading Popular Mechanics, a good source for information.

Bob

Thread: Round belting
03/12/2018 10:13:47

As I am on my 5th Gates 5m710 belt as they keep splitting, plus they are expensive to buy, these polyurethane belts look like the answer for me.

The two types, glue together or connector, which would be the best for the drive on my lathe,I have variable speed so the belt will not start with full load.

Bob

Thread: Do you clean up your rough end
15/11/2018 04:42:54

In the 70s we use to make a deburring tool from a part of a hacksaw blade. A small hook ground with a cutting angle and tape for the handel, worked great on sheet metal till you slipped and sliced the top of the thumb.

Deburring lengths of sheet steel you could actually get oil smoke from the tool, quite satisfying with lengths of fine swarf on the floor. Deburring all blanks was mandatory then, I bet its not today.

Thread: Gasket for air engine
10/11/2018 14:27:08

Thanks, just brought some Loctite 5926.

Bob.

10/11/2018 12:44:35

Im looking for some some of liquid gasket to put in-between joints that will be air tight , and can be taken apart with out to much adhesion, any suggestions please.

Bob

Thread: ME taps and dies
07/11/2018 20:13:38

Upgrade needed

Bob

07/11/2018 16:38:15
Neil,
Mine are not so sophisticated as the photos, the ones I have are chuck held and three year's old.
Bob
07/11/2018 12:21:53
Mark, I only die max 12mm so no need for point threading.
My ARC tailstock holders only have two screws so no adjustments can be made.
Why only two screws on the ARC tailstock holders.
Bob
06/11/2018 19:31:09

I didn't realize that their was different types of holders, but the M 4mm die that I got from the company is tight on the the metric tailstock holder, its the same size as ME dies.

Bob

06/11/2018 17:35:11

Where can I get die holders to fit ME taps, or do I have to make my own, which I don't particularly want to do.

Bob

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