Myford ML7 Quick change tool post

[John CParticipant @johnc47954]

I will add my total satisfaction with A&R tooholders; I have several, and will probably buy more…….And the beauty is, they are almost the same price as the 'others'.

John

 

Edited By John Corden on 25/01/2015 19:41:51

[“Bill Hancox”Participant @billhancox]

Posted by Jon Gibbs on 25/01/2015 07:46:15:

Hi Bill,

They sell through ebay and their service is excellent.

**LINK**

HTH

Jon

Thank you Jon. I will take a look.

Cheers

Bill

[WorkshopPeteParticipant @workshoppete]

Morning All

In answer to Harry's request re the Chronos tool holders I bought a couple 3 or 4 years ago to fit a genuine Myford Dickinson tool post and they did not fit. Having access at the time to a surface grinder I had to take 15 thou of one side of each "V" locator slot to get them to sit correctly and allow them to drop down onto the cam. Other wise they seem ok. I would support all the above buy the genuine article and no problems what are our goals to make models or waste time trying to get new poor quality parts to fit our equipment when for for a few pennies more you can buy the correct part. Buy cheap buy twice.

Regards

Peter

[CotswoldsPhilParticipant @cotswoldsphil]

Can you help me identify which QC toolholder I have acquired?

When I bought the Super 7 at the end of last year it came with a basic QCTH set. The tool-post fits the top-slide clamp stud perfectly. I have the original box (see photo below), the 2 tool-holders are engraved with the part number 4494-48, and appear hardened.

I bought 3 additional holders at the Midlands Show having been told that they were Myford originals and stamped W on the back. I now know (from this Thread) that these were probably manufactured by Weston Engineering.

However, the locking cam does not engage as fully as the matching pair of holders. The one shown at the bottom of the photo is part of the set, the one on the right is one of the new ones. The lack of cam action does not appear to affect the operation or stability of the holder when clamped.

I would like to purchase some more holders but do not want to waste money on holders which might not fit.

Your input would be much appreciated.

Regards

Phil

[NJHParticipant @njh]

Phil

I wouldn't stress about it. I have an original Myford toolpost on my S7 and 15 holders. Some of these carry the "M" / "W" mark and some don't. They all work just fine. The only requirement of the cam is that it pulls the holder into close engagement with the toolpost and holds it there. If you buy holders that don't fit then these are faulty and, as they are not fit for purpose, you can get a refund/ exchange.

You are right thought to want more holders – the real advantage of the QCTP is that you can have all your tools set and quickly change between them.

Regards

Norman

[korbyParticipant @korby]

Some years ago at the Ally Pally MEX I bought a QCTP from a well known supplier. It said MYFORD on the box but a couple of months later when I got round to trying it out found the mounting hole was 3/8 not 7/16 as needed for ML7. Well if its hardened and ground I have a problem. It was ground but not hardened so opened up hole OK.

Then found tool holders bottomed on the top of the top slide long before the tool tip got anywhere near centre height. Needless to say I had lost the receipt so it sits on the shelf to remind me of my folly. May be it would fit a MINI lathe.

Ho Hum

[Harry WilkesParticipant @harrywilkes58467]

Thanks for the info Peter thats the same problem I have !

H

Posted by Peter Newby on 26/01/2015 09:49:02:

Morning All

In answer to Harry's request re the Chronos tool holders I bought a couple 3 or 4 years ago to fit a genuine Myford Dickinson tool post and they did not fit. Having access at the time to a surface grinder I had to take 15 thou of one side of each "V" locator slot to get them to sit correctly and allow them to drop down onto the cam. Other wise they seem ok. I would support all the above buy the genuine article and no problems what are our goals to make models or waste time trying to get new poor quality parts to fit our equipment when for for a few pennies more you can buy the correct part. Buy cheap buy twice.

Regards

Peter

[Gavin HParticipant @gavinh16975]

I'm very interested to read peoples' thoughts about the clamping position on these type of toolposts. The reason being that I recently bought one for myself which has this problem of the toolholders being clamped tight before the cam has reached (what I consider to be) enough rotation to give a secure grip.

I bought and A&R toolpost a few years ago after reading on this forum about them and I have been 100% happy with it, it hasn't ever given me a single problem. However, I bought another one recently which has the above problem and I have been reluctant to use it. I contacted A&R who said that it was intended to be like that in order to compensate for future wear, but surely this is far too much? Unless the cam rotates at least 90 degrees then the toolholder could be pulled loose under heavy or interrupted cuts, couldn't it?

I'm not writing this in any way to 'bash' A&R, as I said, my original toolpost that came from them has been perfect and they have been very quick to answer my questions and have very kindly offered me a full refund if I'm not happy. I still need a toolpost to use though so I wondered what other people thought.

[CotswoldsPhilParticipant @cotswoldsphil]

Thanks Norman, I think A&R are the way to go with all the positive feedback.

Korby…My holders bottom on the Super 7 top-slide, but I only use 8mm tooling so is not a problem. The QCTH block would have to be quite a bit bigger to allow the holder to pass the edge of the top-slide.

Can anyone identify the supplier from the photo of the box above, I'm just curious…

Regards

Phil

 

 

 

Edited By CotswoldsPhil on 27/01/2015 11:07:37

[Michael BriggsParticipant @michaelbriggs82422]

Hello Phil,

I can identify the box as Toolmex, I have a chuck for my Myford that has a similar style label, I also have a toolpost that is of later manufacture, the box is blue labelled with the same part numbers as above but branded Bison. The quality and fit are excellent, I have some Weston holders, A&R and they all fit perfectly.

Regards,

Michael

[CotswoldsPhilParticipant @cotswoldsphil]

Hi Michael,

This Forum is indeed a mine of information…

Thanks for identifying the supplier, the QCTH appear nicely made and all work well, so I will look to get some holders from A&R when they next advertise a batch.

Regards

Phil H

[“Bill Hancox”Participant @billhancox]

Posted by CotswoldsPhil on 26/01/2015 13:56:06:

Can you help me identify which QC toolholder I have acquired?

When I bought the Super 7 at the end of last year it came with a basic QCTH set. The tool-post fits the top-slide clamp stud perfectly. I have the original box (see photo below), the 2 tool-holders are engraved with the part number 4494-48, and appear hardened.

Phil

I have a similar tool post. Can anyone tell me what that extra hole is for? And don't try to tell me that it is a holder for a hand-held mobile graphite communicator (pencil).

Cheers

Bill

[Mike PooleParticipant @mikepoole82104]

Many Dickson toolposts have a pin fitted in the hole, I suspect it may be dowel to locate the toolpost on the top slide.

Mike

[Clive FosterParticipant @clivefoster55965]

Bill

The Dickson T2 triple mount holder that came with my Pratt & Whitney model B had a very OEM looking sliding locating pin in the equivalent hole which appeared to be intended to allow the post to be returned to its normal alignment should the user need to rotate it for any reason. Given that the thing was well rust'n age fitted and that Messrs Pratt & Whitney had not seen fit to provide anywhere suitable on the topslide for a matching hole I suspect that it came inserted from the factory and had never been moved.

I've seen a reasonable sample of Dickson type posts over the years in various sizes and that's the only one having anything in the hole. Unless you count spiders, swarf, cutting oil, dust and other contamination.

Could be useful as a mount for a dial gauge carrier assembly. An expanding collett or O ring device to hold a stud or short post onto which the actual carrier gubbins could easily be fitted when needed should not be too hard to arrange.

Limited rotation angle of the locking cam can be due to poor fit of the height setting collar in the grooved section below the locking drive nut. On the T2 series there is enough variation in collar diameter, thickness and glove depth between various quality (European & UK) brands to prevent universal interchange out of the box. I have some 5 or 6 varieties in my collection. Dickson appear to have the deepest collars, Rapid the shallowest. Something over 20 thou difference so everything will fit Dickson but modifications are needed to Rapid. I diamond filed out the top of the groove. worth checking if same applies to smaller sizes. Had to trim the diameter of one collar too.

Given that everything is solid I don't think the locking mechanism can actually go over centre. As I recall matters the larger Dickson merely goes close to 90°. Hafta look at end of year clean-up time. Presumably there is an angle close enough to 90° that holds despite not actually going over.

Grot inside seriously reduces performance. I clean and wipe lube mine every year. Given the small clearances its amazing how much stuff gets in. At least its easy to keep the mounting faces clean when in use.

Clive

[NJHParticipant @njh]

Yes Michael is correct here – it is for a dowel to align the toolpost with a hole drilled in the topside. The dowel pin will have a "knob" turned on the outer end to allow its removal and rotation of the post to another position where required.

Norman

[“Bill Hancox”Participant @billhancox]

Thank you gentlemen. I appreciate your assistance. Your comments are certainly in line with my assumptions. I may put your information to use on a raising block that I am building.

Cheers

Bill

[Harry WilkesParticipant @harrywilkes58467]

In my ignorance I purchased a Dixon T4 tool holder off ebay, I knew there was something wrong the minute the postman hand me a quite heavy package and yes I was right upon opening the package and out pops this tool holder about four times the size of a Myford one ! If anyone can use it and wants to take it off my hands let me know.

H

[RobboParticipant @robbo]

Cotswold Phil,

As said previously, the box indicates Toolmex brand. The number 4494-48 is the Toolmex code for a standard toolholder of a size to fit Myford. The numbers are normally etched onto the toolholders.

Parting off toollholders are 4496-48 for instance.

Lancs Phil

[CotswoldsPhilParticipant @cotswoldsphil]

Robbo,

Thanks for the confirmation, the numbers are indeed etched on the holders, I was able to go on the web and find similar items I have in my possession.

I will try the holders from A&R when they next have some, but it looks like there may be a queue.

Regards

Phil H

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