Member postings for David Davies 8

Fastdave

Tracy tools list a tap the same thread as the Myford spindle nose and taps can also be found to fit the Boxford spindle which is 1 1/2 x 8 IIRC.

Dave

+1 for Cncpoorboy quality and prompt delivery too!

l have no connection either

Dave

Steve

I don,t know if you have seen Matt Look's videos on YouTube, he renovated a very poorly Elliot 14S a few years ago. He describes scraping in several videos. His channel is "lookcreations"

HTH

Dave

If it is marked Pb93.5 it is certainly not lead free, in fact it is getting towards pure lead. It should be good for wiped joints.

Noel

Eight pole would give a typical speed of 725 rpm @ 50Hz, similarly six pole would give 960 rpm. 4 pole gives 1450 or so. Neither of the speeds given above are typical for an induction motor running at U.K. Mains frequency. Can you have a closer look at the rating plate?

cheers

Dave

+1 for the George Thomas mod and his books are well worth reading.

For cable jointing the solder could be as much as 80% Lead. This solder goes through a 'pasty' stage between solid and liquid, allowing it to be wiped with a 'moleskin' lubricated with tallow. To see a cable jointer at work on 11kV cables was a treat compared with the usual 415V humdrum.

Hi Darren

I have an Alexander single lip cutter grinder which I use to sharpen drills using the 4 facet method. This machine is a Deckel clone and uses the "Deckel" type collets. I have been able to get collets from ebay sellers, the maximum available seems to be 5/8". The od of the collet shank is 20 mm so the wall thickness is about 2mm for that size. These collets are sometimes referred to as "U2" collets. Finally these collets have a buttress thread for the closing nut. A bit of an overkill perhaps as vee thread would surely suffice?

HTH

Dave

" I did manage to get one off with the open end of a combination wrench hammered in to the groove"

Martin,

I'm pleased to read that there are still a few of us craftsmen around!

Regards

Dave

PGK

Thanks for the alternative method. It did occur to me that spark erosion could also be used. If my memory serves me correctly machines to do this have been described in ME & MEW in the past.

Cheers

Dave

Jason

the blade is ''all hard'' not 'bi-metal' so I don't have that option.

Cheers

Dave

Hi Bill

Thanks for the details of how you go about the job!

Cheers

Dave

I have some blades which are too long for my power hacksaw. It crossed my mind that a carbide drill could produce a new mounting hole at the correct centres. Has anyone tried this and what was the result?

thanks

Dave

Hi All

As a user of a small mill with an MT2 spindle I can't comment on R8 versus MT3 debate but I am curious that no-one has mentioned Int. 30 taper. Are any machines available with this type of Spindle? Int 40 is common enough but is in a different league, as Andrew has said above.

Dave

No real help but the topic reminded me that I saw Austin Hayden driving his Lorna Doone at the IMLEC at Bittern park, Southampton in 1970. It was a very well finished loco.

Dave

Hi, you could make your own, a strip,mounted behind the gauge glass, painted white with diagonal black lines thereon is used on full sized locos. The water defracts the image of the diagonal line and so helps the viewer to see the level.

hth

Dave

Thanks for the link Pete, all is clear now.

Pete

I hadn't considered using the top slide for Infeed but in that circumstance the gib should be nearest the tailstock as you have stated. In that case the Myford would have its gib nearest the chuck.

I wasn't aware that the Boxford had a facility for a cross slide stop. Can you expand on this as I can see it would be useful for screwcutting instead of checking the dial before starting the next pass?

cheers

Dave

Hopper commented:-

"Cutting forces are borne by the opposite solid dovetail surface."

Yes, but one exception is the Boxford top slide. Heaven knows why they made it that way round. I presume that the Southbend and all its other clones are the same?

Cheers

Dave

Rowan

If you pin the gib strip to the cross slide using a piece of 1/8" silver steel, as described by George Thomas in his "Model Engineer's Workshop Manual" this will prevent movement of the gib. The dimples will not positively locate the gib to the screws.

I have carried out this mod to both Boxford and Myford lathes. This included making a new gib strip on one of the machines for which I used bright mild steel. I'm sure the method could be applied to the Portass.

HTH

Dave