So Ian, are the parts on the right of the photo treated with phosphoric acid? The colour suggests they are. And there is a whisker of tooth play on the grinder in my shed too.
Talking of beauty Peter, how is the azure blue FP1?
Bob.
So Ian, are the parts on the right of the photo treated with phosphoric acid? The colour suggests they are. And there is a whisker of tooth play on the grinder in my shed too.
Talking of beauty Peter, how is the azure blue FP1?
Bob.
The FP1 is up and running, the colour is quite fetching!! Everything on it is in superb condition, it had a very sheltered existence in its formative life and should be good for another 51 years (not that I will be around for that anniversary). The workshop is functional at long last so I will get on with the things which were interrupted 18 months ago.
Peter
Thanks Kryn.
Bob, Both lots have had the phosphoric acid but for some reason the collets have gone black, a very different steel I imagine? It may come off when I clean them up in the morning.
Regards
Ian
Well Telstra have finally reconnected us to the world so I thought that I would do an update with where I have got to with this. The machine is fully back together and I have cleaned up and reassembled all of the accessories, I have found nothing broken or seriously worn, which given the apparent state of the machine when I started seems to be little short of a miracle. I have to get new belts for the main spindle, I reassembled it with the old belts which was a mistake.
Attachment 350240
In this photo the workhead is mounted to the table and the internal grinding spindle is mounted to the main spindle head. I am missing the the pulley and belt that enable the main spindle to drive the internal grinding spindle. Sitting on the table are two positioning blades - not sure if that is the correct name? Also on the table are the collets, the 5 on the right are all 3mt. I don't quite understand the one in the centre?
Attachment 350241
In this photo the driven centre and the tailstock are sitting on the table. To the right is the holder for the positioning blades.
A number of things are missing from the machine, but fortunately nothing that I can't make (I think...hope...). The project list now includes
Pin spanner for the main arbor nut.
Bracket to hold the LH end of the main table (one is there, but it looks to me like there should be two)
Thumbscrew for the Y axis scale
Pulley to drive the the internal grinding spindle from the from the main arbor (this is the most challenging job as it runs around 3K rpm)
Pin to hold the guards for the main spindle.
One long one short T bolt.
Grinding wheel dresser (I have ordered a diamond dresser as the basis for this)
I now need to order some cup wheels, should I just get them from Blackwoods or is there a specialist supplier?
Regards
Ian
Attachment 350240Attachment 350241
Hello Ian,
I am intrigued by your workhead. It is considerably different to the one I have. The base casting is also different. The spindle has a very useful threaded nose, useful if you have a 9" Hercus lathe that is. :U I look forward to a dissection.
I can furnish you with photos and dimensions of your missing parts along with details of a belt supplier for the internal grinding spindle. I purchased a green Norton cup wheel from the States on eBay. Cheaper than anything of quality locally.
I experienced some disappointment with a locally purchased wheel - http://www.woodworkforums.com/showth...19#post1350219
Bob.
I get my wheels from Webber abrasives at Welland. They sell Norton wheels never had any problems. The grinder looks great, good job.
Thanks Bob, some photos and dimensions would be really helpful, no urgency.
I will get dissecting.
As it happens I don't have a 9" Hercus Lathe but it does match the spindle on my dividing head so I have a backing plate and a presently unmounted small 3 jaw chuck which I have been wondering vaguely what to do about...
Regards
Ian
Ian,
It turns out that the workhead on your grinder was originally a No.3 accessory. The head I have features a cotter type spindle lock, yours would have locked by means of an indexing plunger engaging a notch in an indexing plate.
Bob.
Attachment 350301 Attachment 350302
From your second picture, it looks like it was found in a chook yard:D
Kryn
KB,
The photo was one of a number sent to me by Mark Harriss" Graziano", a former forum member. The grinder is owned by a bloke who manufactures fuel injectors and it is still in use! Here's another photo. A belt change and it'll be good for another 50 years!:U
BT
Attachment 350358
That is really interesting Bob, all the accessories with mine have the bed number (719) stamped on them so they belong together. It looks like mine is an early one, perhaps transitional?
Attachment 350368
Attachment 350369
The workhead body and the base castings look exactly the same but the intermediate casting is different because on mine the motor is on a horizontal mount rather than the vertical mount shown in your 3A photo.
This encouraged me to do some dissection!
Attachment 350370
This is the exploded view, showing all the components except the screws. I have removed the back bearing and left the front one in place. The bearings are FBC (Fafnir?) EE10. The spindle has Fafnir 204K C4 so I think that it is probably all the original bearings still in place.
Attachment 350371
In this view I have put all of the castings into the correct orientations. I am sure that you are right about the spindle lock, which I don't have. The indexing plunger would mount into the slot on top of the casting and engage a disc mounted in place of the pulley which is only retained by 4 screws.
Attachment 350375
Hard to see but in the front of the casting there is a groove with a small (app 1/16") ring of felt, this is the only oil seal in the whole thing.
With a light set on the bearings and some oil it is a very low friction assembly. There is just a little friction against the felt.
The tailstock shown in your last photo is also interesting. The spindle appears to be threaded, advanced by the handwheel and locked by the T bolt. Mine has no handwheel, rather it is sprung with a lever underneath it to withdraw the spindle.
Regards
Ian
Attachment 350368Attachment 350369Attachment 350370Attachment 350371Attachment 350375
Thank you for the dissection and the photos Ian.
I have two different No.1 brochures, both with Hercus' address at 56 Dew Street, Thebarton, and no printing date. Both brochures list a universal work head, the more comprehensive 8 page version shows numerous illustrations of the head like mine, the other 4 page version shows yours.
I find it interesting that the more useful screwed spindle nose was abandoned when Hercus produced the alternate head. Chuck mounting on mine necessitates the installation of a screw nosed arbor in the spindle. Whilst Peter provided me with a comprehensive selection of 3 Morse collets, they run out of puff at 1/2" , not the 3/4" bore access you have. A useful feature they did incorporate into the spindle was a section of 1" parallel bore which accommodates various bushes. Peter had made a number, some to suit various square section tooling -
Attachment 350404
The felt seal is interesting. I will have a look to see if something similar could be installed before the bearings in my head given that I will more than likely use unsealed Timkens.
Bob.