Myford super 7 cross slide

[Frank MckenzieParticipant @frankmckenzie32989]

I’ve a Myford super 7 with a powered long base cross slide with 5 t-slots in it.

Looking at buying a new cross slide screw and nut off myford.co.uk

I emailed them asking would it fit my machine and they say that the 5 t-slot slide was only made for the ml7.So their part ‘might’ not fit.Bear in mind that the part is specifically for the powered cross slide version.

My question is does anyone know if the powered  cross slide on the super 7 has the 4 t-slot as standard or is the 5 t-slot an add on.?

The cross feed screw thread is 8″ long on mine.

The part no. In question is 30/141

Many thanks.

 

 

[Nick HughesParticipant @nickhughes97026]

The ML7-R was non Power Cross feed, and fitted with a 4 T-Slot Cross Slide as standard (Together with the ML-7 style of compound/topslide), with a longer 5 Slot version available as an accessory.

The Super 7, both non and power cross feed, was fitted with a longer 5 slot cross slide as standard.

Also on the Myford Ltd website, the excerpts from the Super 7 Power Cross feed model manual, on the Carriage Assembly spares page, shows the 5 slot cross slide as standard, so sort of shooting themselves in both feet!

[Frank MckenzieParticipant @frankmckenzie32989]

Yeah I saw the 5 slot in the parts catalogue and assumed it came from the factory that way. However the email from myford has raised doubts that it will fit.

I’m inclined to think that it will fit my lathe though.

Thanks for your reply.

[SteviegtrParticipant @steviegtr]

But does the Ml7 screw have the extended end to accept the verier adjustable scale dial.

Just checked my Super 7B & yes 5 t slots.

Steve.

[Harry WilkesParticipant @harrywilkes58467]

Frank I sure my S7 with powered cross slide has 5 slots

 

H

[John PurdyParticipant @johnpurdy78347]

My Super 7B,  manufactured in late 1976, also has a 5 slot powered cross slide. Slide itself is 10 3/4″ long.

John

[flatlineParticipant @flatline]

iI don’t know if this helps, but I have a standard Super-7, and wanted to find a replacement cross-slide for it, as the original had been abused in the past.

I bought a s/h item from a later power cross-feed machine, and it’s identical…. It also shares the same part#’s in the Myford parts lists too.

 

[bernard towersParticipant @bernardtowers37738]

Just curious whats the second threaded hole for in the saddle which has the hex bolts with slots in for?

[flatlineParticipant @flatline]

The bolts are there just to blank off the holes, the first is I believe for a travelling-steady… the 2nd was there when I purchased the lathe; but I plan to use it to fix a cross-slide clamp to…. Similar to the one in the photo ….

[bernard towersParticipant @bernardtowers37738]

Ah right, the crosslide clamp is handy mine is fitted using the two front saddle bolts and the square headed compound screws changed for socket heads.

[flatlineParticipant @flatline]

Many thanks for the photo, that’s a far more practical location 😎🇬🇧👍

[Frank MckenzieParticipant @frankmckenzie32989]

Just an update on this.

Ordered the new Cross slide nut and screw plus the tightening collar for the inside.

Nut is the same.However the screw is the same bar one difference.The collar for holding the dial is slightly wider and won’t take the dial.

Retaining/tightening collar is too small.Wont fit.

Option 1.

Fit the new nut with the old screw.Which I did and works fine with about 5 thou of play/backlash.About the same with new screw and new nut.So little to no wear on old screw.

Apparently these come as a mated pair.Dont know if this matters too much..?

Option 2.

Turn down the new screw to fit the dial gauge and fit new nut and new screw.

Option 3.

Send the lot back and hope they send the proper ones.However I’m in Ireland and with postage cost and customs very adept at losing parcels I’m reluctant with this.

I’m leaning to Option 1or 2.

Any other ideas..?

 

 

[bernard towers]

On bernard towers Said:

Ah right, the crosslide clamp is handy mine is fitted using the two front saddle bolts and the square headed compound screws changed for socket heads.

Why do you need that clamp? There are two locking grubscrews provided on the other side that press against the gibs. They do the job perfectly well.

[Nigel Graham 2Participant @nigelgraham2]

I’d be inclined to change the bolt in that clamp, for one much shorter so it does not project forwards of the wiper. There are times when using a four-jaw chuck or the faceplate when the saddle is close-to and any projecting bits are not a good idea.

Or better perhaps, take Charles’ advice!

The second hole is probably just another location for the travelling-steady, allowing a larger work radius. It could be a previous owner’s modification.

[bernard towersParticipant @bernardtowers37738]

The reason is that using the screws the other side tends to bend the gibs the one on the ther side does not. there are several ways to skin a cat!!!

[Chris CrewParticipant @chriscrew66644]

If I recall correctly, the small block for locking the cross slide was an idea that won a small cash prize from MEW a few years ago. I fitted it to my ML7R as I thought it would be useful to have, which indeed it is.

[bernard towers]

On bernard towers Said:

The reason is that using the screws the other side tends to bend the gibs the one on the ther side does not. there are several ways to skin a cat!!!

I am not sure what ‘tends to bend’ means. The gib is merey sprung a bit, requiring little force and, way, way within any risk of bending. They are, after all, provided for the purpose by the manufacturer. But, sure, you do what you like!

I will have a think about using grub screws for the top-slide swivel clamp anyway. It is often a mild annoyance getting the spanner to those square headed screws.

[bernard towersParticipant @bernardtowers37738]

Another plus to using the LH side is that it is solid and requires little force on the screw.

[Author]

Posts