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Member postings for SteveI

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

Thread: Arrand boring heads.
25/05/2019 20:36:39

Hi,

the 3” head uses M14x1

the 4.5” and 5.25” use 16mm x 1.5mm, the shanks are the same as their fly cutters.

the 6” I don’t know.

the 6.5”, 8” boring and facing and 10.5” all use the same shanks but these are held on by a register and 4 shcs.

steve

Thread: New Toy
10/03/2019 14:45:28

Wow very interesting. Which options did you go for it?

Steve

Thread: MT4.5 sleeve
10/03/2019 14:38:35

Bill,

 

Item 124 is most likely something other than a MT4.5 sleeve. Your link is to the southbend type of boxford. The X10 is the type with the D1-3 camlock nose bored for a MT4.5.

X10-02-052 HEADSTOCK REDUCTION SLEEVE

£89.27

most likely plus VAT.

 

Steve

Edited By SteveI on 10/03/2019 14:38:56

10/03/2019 12:08:01

John Paton,

I am not sure that the MT5 and MT4.5 tapers are the same. Machinery's Hanbook (30th Edition) states that the taper per foot for morse taper 4.5 is 0.62400 and MT5 is 0.63151. When I made my MT4.5 sleeve (Boxford lathe) I used a MT7 as a gauge, which as far as I know is the only other morse taper which does have the same taper as MT4.5.

Also 2mm to grind is a lot to grind. If it were me I would want to turn away most of that 2mm before the grinding.

I am not sure what they cost but Boxford used to supply MT4.5 to MT3 adapters and MT4.5 to 5C collet adapters, and I think Grizzly in the USA used to sell MT4.5 sleeves as well.

Steve

Thread: 7" gauge Duke of Gloucester
14/01/2019 19:06:10

Inspirational

Thread: DIY Epoxy Frame based CNC MILL
13/01/2019 16:04:10

Hi John,

Wonderful job. Very interesting and I am working my way through the paper you linked to.

Thanks,

Steve

06/01/2019 10:15:55

John,

Thanks for the updates, a most interesting build.

I am looking forward to learning about your linear rails and how they mount with particular reference to your need to lap the steel to the tolerances you quote. Which brings up the question what are you going to machine on this tool and what kind of tolerances are you aiming for?

Thanks,

Steve

20/11/2018 21:33:49

John,

Wonderful thread and please do keep posting, the more detail the better!

Steve

Thread: Small slitting saws
09/10/2018 23:32:57

Ronan,

CR Tools in Sheffield have several options very close to what you want.

**LINK**

I have no connected except as a satisfied customer.

Steve

Thread: Harris Milling Machine Arbour Adjustable spacing collar
28/08/2018 12:47:02

Hi,

I have been given a "Harris" milling machine arbour adjustable spacing collar. Picture here:

horizontal-milling-adjustable-spacer.jpg

The collar is in 2 parts with a 20 TPI thread. The nut component has 50 teeth around its outside diameter. The screw part has 2 small tapped holes. Presumably for a ratchet to allow easy adjustment of the spacer by 1 tooth/thou, at a time. This ratchet mechanism is missing.

I am wondering if anyone knows of how this looked originally so that I can make a suitable replacement.

Thanks,

Steve

Thread: Ideal amateur lathe spindle nose?
28/08/2018 12:00:01

Niels,

Thanks for keeping this thread alive. I have a feedback for you. The torque required to tighten ER50 collet's is considerable. Especially squeezing them down to the lower end of their 2mm closing range. This is based on my own experiments with some second hand regofix ER50 28mm, 30mm, and 32mm collets and a regofix ER50 ball bearing nut. you will need a very secure spindle lock on your design. Oversize collets are available for ER40 utpo 30mm. Something to think about.

I have recently come in to ownership of a small hardinge UM mill from the 1940's. Saved from the scrap man. Unfortunately this "lucky" find comes with a 5C (!!!!) horizontal mill spindle and no tooling. I am looking to design and make a new 30 taper spindle for it. So please keep posting your thoughts!

Steve

Thread: Cataract lathe by Hardinge Bros
19/06/2018 19:53:42

Keith,

Interesting. What number spindle does your lathe have? A number 5 size has a spindle bore of approximately 1.25" stock and fits 5C collets. A number 4 is approx 1" stock and fits 4C collets, 3C I am not sure but fits 3C collets. There are 4 deg taper and threading spindle nose variants for the outside of the spindle noses.

There is a chap that is a regular poster on the practical machinist Hardinge forum who is a fountain of knowledge on Hardinge manual lathes and mills, especially the older models. His name is on the lathes.co.uk link Michael posted. I expect if you posted there you might also have chance to locate a replacement cross slide and possibly other accessories.

Steve

Thread: Manual for a Myford MG12 cylindrical grinder?
05/06/2018 20:11:53

Jonny,

 

Have your exact model and machine number to hand and contact **LINK**. They will have the correct manual and may well be cheaper than lathes.co.uk.

The correct manuals are reasonably useful and should cover all your stated requirements.

 

Depending on the exact machine you have if it is the later type (12" wheel, and optional swing down internal grinder) there were factory collet options for 4C and 5C collets. The earlier type had a different collet type that I am not familiar with.

 

Steve

Edited By SteveI on 05/06/2018 20:13:18

Thread: A recommended live center?
05/03/2018 18:09:55
Posted by Michael Gilligan on 05/03/2018 09:57:59:

Posted by ega on 05/03/2018 09:41:54:

Gepy (Swiss) - good but expensive.

.

+1

... actually, make that +2

Male and female versions are both superb.

MichaelG.

**LINK**

**LINK**

Edited By Michael Gilligan on 05/03/2018 09:59:47

Make that a +3. Didn't GHT himself write something along the lines that a "rotating center is an essential accessory for everyone that can afford it.". I would add to that by suggesting the word quality should be at the front.

I had a second hand Rohm center and after using it on a good lathe I noticed a visual striping in the finish. I then got lucky on a second hand female center gepy and the finish vanished. Later to banish a major milestone birthday blues I got a male center gepy and I have not regretted it. One thing to note the standard GEPY has quite a short stub on the end and does not eject on all tailstocks. They used to do a variant P/N that had a longer stub. I don't know if they still do. It is of course a simple matter to turn up a replacement as they simply screw in and out.

Steve

Thread: Diamond grinding wheels
02/03/2018 16:37:48
Posted by StephenS on 01/03/2018 02:40:34:
Posted by SteveI on 28/02/2018 22:44:23:

Just a quick comment -- CBN doesn't need to be expensive. After a tip off from a friend I have been using new old stock from ebay sellers from ex Soviet Union locations, a cost effective source of CBN. I have a number of Ø125mm wheels and the costs were between US$20-30 per wheel with free post. I use them on HSS I also purchased a "1200grit" CBN low speed lapping wheel which makes no mess for keeping tools razor sharp.

Steve

Hi Steve,

Please could you give links to where you get these as I could not find them. I may well not be searching very well though. I would be interested in getting some at those prices.

Thanks, StephenS.

ebay.com and sellers from ukraine.

28/02/2018 22:44:23

Hi,

Just a quick comment -- CBN doesn't need to be expensive. After a tip off from a friend I have been using new old stock from ebay sellers from ex Soviet Union locations, a cost effective source of CBN. I have a number of Ø125mm wheels and the costs were between US$20-30 per wheel with free post. I use them on HSS I also purchased a "1200grit" CBN low speed lapping wheel which makes no mess for keeping tools razor sharp. For Carbide I use Diamond from the typical hobby suppliers, none of which are cost effective for CBN. I whole heartily recommend CBN for HSS, it does a wonderful job with the minimum of mess.

I would like to get advice of which of CBN or diamond is most appropriate for stellite. Even at the prices stated I want them to last as long as practical.

Steve

Thread: INT 30 sleeve to hold collets for milling cutters closer to spindle
25/02/2018 23:47:41

Hi,

Schaublin made "Biconical collets types ISO 30" with 3-16mm and 1/8"-5/8" bores. I have a few of the metric that I have never used. They are I think a possible solution to your problem.

**LINK**

Look at page 13.

Now I can't seem to find the link again but I recall seeing on aliexpress or alibaba similar collets available.

If it were me, at the risk of teaching you to suck eggs I would look into, revising the work holding, making a riser block, rather than buy these if you can source them. What mill do you have?

Steve

Thread: Squareness comparator's bumpers
18/02/2018 16:30:23

Gareth,

 

Are you thinking of making your own or looking to understand what is important to aid in buying?

 

Hopper is of course bang on the money. One issue I have found is that if you are trying to check squareness to very tight tolerances then the you need a tool that repeats the measurement reliably. Otherwise it will drive you mad. Obviously you are looking to compare squareness but what in terms of job are you looking to do with it?

 

A standard marking out gauge can do a really good job but the units which are especially made for this type of job are very heavily built i.e. rigid when compared to a standard marking out gauge. The marking out gauges have more degrees of freedom which the comparator does not need. When you are using a tenths/50 millionths/micron dial indicator you need all the stability, rigidity you can get. You will also need a reference to calibrate the comparator to. The classical method is to use a cylindrical square but the cheapish granite tri squares from china are more than good enough.

 

Stefan Gotteswinter has a video on youtube about making a squareness comparator and oxtool has a few examples of using one.

 

Steve

Edited By SteveI on 18/02/2018 16:31:53

Thread: Spotting Drill or Centre drill.
09/02/2018 15:55:07

For the folks using spotting drills are these 90 degree or 120 degree or another angle? I assume you follow up with a 118 degree or as near as regular twist drill.

Thanks,

Steve

Thread: Life time supply of shim!
04/02/2018 14:04:14
Posted by Ian Parkin on 04/02/2018 12:29:02:

I have a use for quite a bit of it but if anyone wants some i’ll Do half or quarter of teh whole lot for 1/2 or 1/4 the cost to me

hi Ian,

i've sent you a private message.

Thanks,

Steve

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