Thread: Blohm HFS6 surface grinder

Good to see it got there safely. I was worried...

Cheers

SC

Looks good Ewan, moving heavy precision equipment is always nerve wracking, glad to see it safely in it's new home! Looks to be a real gem!

Thanks for picking up those bits and pieces for me, Josh and I will be up there on Thursday ( if that suits?)

Regards
Ray

PS... What's the chuck size and X Y travel?

Hi Ewan,
Thats more like it!
Great to see it home safe.

Originally Posted by RayG

Josh and I will be up there on Thursday ( if that suits?)

Well I hope not, unless you drive very fast

Stuart

Originally Posted by Stustoys

Hi Ewan,
Thats more like it!
Great to see it home safe.


Well I hope not, unless you drive very fast

Stuart

Agreed Stuart,
that is some seriously fast driving

Phil

Originally Posted by Ueee

Ok, i guess this was more what Stuart was meaning......

Everything went fairly well today, despite some scary moments trying to skate her out of the little room she was in. My forklift drivers fork weighed her in at about 2700kg no wonder i had trouble with the ally strip in the doorway! It was very easy to pack the table up and strap it down, and what i thought was a sump full of oil only had an 1" in the bottom.

I am fairly sure she has roller ways on the Y axis as well as the X.

She is home and close to where i wanted her, the electrical box got in the way a bit.

DSCN0511 (Large).jpgDSCN0512 (Large).jpg

The Y and Z feed handwheels. There is a small fine adjustment knob on the right of each of these, the black buttons move the axis by 1 vernier graduation, click by click.
DSCN0514 (Large).jpgDSCN0516 (Large).jpg

Hydraulic sump, pump and Z screw and spiral (hyper zicloidal?) bevel gear
DSCN0522 (Large).jpgDSCN0523 (Large).jpg

Coolant tank, and filter, i'm guessing the filter is missing the filter medium, whatever that should be.
DSCN0536 (Large).jpgDSCN0535 (Large).jpg

With the mag table off and a lard like substance cleaned off the table i clocked the table along its travel, without leveling or anything. There is about 3um in it.

DSCN0539 (Large).jpg

As per Josh G's request video's to come, but not one of her falling off the truck.....(and bits flying everywhere if i remember the conversation rightly)

Cheers,
Ew

A very nice machine Ewan. The whole unit looks cleaner than the photo shown at the auction.
It was very pleasing to see you win it. I am sure its gone to a good home where it will provide a lot of enjoyment.
Also the imperial readings (thous & tenths) appeal to me !
regards
Bruce

Good to hear it all worked out well. As mentioned, moving heavy machinery is always a stressful time. Did the radial arm drill get collected in the end or do we now know where one is going VERY cheap?

Pete

Awesome news Ewan,
I'm glad to see it arrived to its new home safely. I like that one click down feed, that is a nice feature. Where there any wheel dresser in the bundle as industrial diamonds are a man best friend.
-Josh

Thanks Guys,
Ray, the table is 550x300, travels are 650x350x? (not sure how high the head goes yet). I guess that means i can effectively grind 600x300.

Josh, there is one fixed dresser and 2 for going on the mag table. The fixed one is in the tour video here: Blohm HFS 6 surface grinder - YouTube

I have a vid of how the push button feed works too, it is a very elegant and simple (enough) system. It should be done soon.

All the machining is really nice, make the Vernier look like it was done by a backyard hack (well maybe not quite) I'd hate to think what one of these would have cost new....

Anyway, i took the table off the arvo, pulled the hydraulic pickup filters off and cleaned the muck out of the sump. Nasty job.....it was just brown sludge at the bottom. I put my 4' level on the table for some scale.

Cheers,
Ew

Love the video, fantastic condition for not being used for 6 years! how deep is that bearing grove in the ways on the table?

I'm guessing the location for the table speed is where it is so that it is close to pump.

Well the ways look OK...No sign in the photo of any brinelling..

Not sure if that grease is supposed to be there though.... My gut tells me it should be dry, grease attracts grit..

I am actually surprised it is ball ways in a grinder of that vintage...

Originally Posted by Brobdingnagian

Love the video, fantastic condition for not being used for 6 years! how deep is that bearing grove in the ways on the table?

I'm guessing the location for the table speed is where it is so that it is close to pump.

The bearing "groove" is more like a polished point. You can't feel it with your finger nail....
I hadn't though about the speed adjuster being there so its close to the pump. I guess you would usually set it for the job and leave it alone.

Cheers,
Ew

Hi Ewan,

Looks good, I liked the video with Arthur's accompanying audio track! I think the reason the X axis speed control is down lower would have to do with the way the hydraulic lines are run, that is probably a flow restricting valve of some sort.

Automatic downfeed is a very usefull thing to have, it would be worth finding out how the original works, and try to upgrade it, the push button is very handy, on ours the downfeed cover is usually left off, and you can click single downfeed increments by rotating the wheel manually

What are you going to use for coolant? We've been happy with Fuchs EcoCool 610.

Regards
Ray

Here is the vid of how the push button feeds work Blohm surface grinder fine feed ratchet. - YouTube

Ray, I'm sure it would have been another motor (stepper maybe?) running the feed shaft, as you can see in the video there is a place for an adjustment pot in the control pendant, then i guess its just a case of taking the trigger from the change of traverse direction and feeding that into a driver/controller. Getting the motor in would be the hardest part.
I'll probably just use the full synthetic i am already using, Callington Ultra-Synthet 971. Mixed at a lower rate than normal machining it is recommended for grinding.

RC, i'm not sure about the ways being greased or not. I can buy a manual on ebay, but i only get the PDF being outside the states, and it will cost me $150. I have a brochure for the simplex (next model down) grinders from the same era, but it is in french. Looks like i'll have to do some translating.

Cheers,
Ew

Originally Posted by .RC.

Well the ways look OK...No sign in the photo of any brinelling..

Not sure if that grease is supposed to be there though.... My gut tells me it should be dry, grease attracts grit..

I am actually surprised it is ball ways in a grinder of that vintage...

The translation is real shaky but i think you get the gist...

'Ltd Street and long maintenance of high accuracy
I for wear ball bearing slides and king
ninime through the rolling friction.
s because there is no oil film No.
in thickness between the balls and the guides. Mel
s, while raising or lowering dl should be avoided
Nation gummed oil deposits. It is the sea
e and the carrier frame of the machine.
power for controlling the table and sup
without jolts (no stick-slip effect) even

Ray, does the cinci T&C grinder have lubed rollers?
The Felder's table is basically the same but with cylindrical rollers, they say no lube = no attracted dust.

Cheers,
Ew