Author Topic: Surface grinder restoration and scraping  (Read 870 times)

Offline Andrew Wildman

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Surface grinder restoration and scraping
« on: June 21, 2017, 04:08:43 PM »
Hi all.
I have posted the first in a series of videos documenting the restoration and scraping of a Herbert junior surface grinder.
<a href="http://www.youtube.com/watch?v=dYJYqqWhyxM" target="_blank">http://www.youtube.com/watch?v=dYJYqqWhyxM</a>

This will be the first of I don't know how many videos charting the success or otherwise of my restoration.

I hope you enjoy! :D


Offline mattinker

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Re: Surface grinder restoration and scraping
« Reply #1 on: June 21, 2017, 04:49:34 PM »
I'm looking forward to following this thread!! Off to a good start!

Regards, Matthew

Offline Pete W.

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Re: Surface grinder restoration and scraping
« Reply #2 on: June 22, 2017, 04:48:18 AM »
I've just updated Adobe Flash Player but I still get a post with a big blank space! 

   :worthless:

When I right click in the big blank space, I get a window saying 'Movie not loaded'!

   :bang:   :bang:   :bang:   :bang:   :bang:   :bang:   :bang:   :bang: 
Best regards,

Pete W.

If you can keep your head when all about you are losing theirs, you haven't seen the latest change-note!

Offline philf

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Re: Surface grinder restoration and scraping
« Reply #3 on: June 22, 2017, 05:07:40 AM »
Hi Andrew,

Thanks for sharing this.

I have a similar job to do on a Capco surface grinder so I'll be watching with great interest.

Cheers.

Phil.
Phil Fern
Location: Marple, Cheshire

Offline Mike E.

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Re: Surface grinder restoration and scraping
« Reply #4 on: June 22, 2017, 05:54:44 AM »
Hi Andrew,

I've seen a couple of Alfred Herbert Jr. machines in the past and liked the simple design. A couple of months ago in April I found a later model unit with the larger knee & oiler for sale. It appeared to be in very good condition, so I bought it. There won't be a chance to try it until my new garage / workshop is built, and a rotary phase converter installed. Thank you for posting this topic, I am looking forward to your rebuild with great interest !

Here is a photo of the machine I acquired.
Mike

California & Wales  - Home, & Home Away

Offline Andrew Wildman

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Re: Surface grinder restoration and scraping
« Reply #5 on: June 22, 2017, 07:55:54 AM »
Mike,
Mine is the same model with the oiler.  the rest of the ways seem in ok condition.  I think the bellows failed on the column and grit go in.

Pete,
I am not sure if the problem is just with you or others also can't see.  anyway, here is the link:

https://www.youtube.com/watch?v=dYJYqqWhyxM

Phil,
I was looking out for a capco when I spotted this.  they seem to be very similar machines, I think the capco has a slightly bigger capacity

Offline philf

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Re: Surface grinder restoration and scraping
« Reply #6 on: June 22, 2017, 08:14:40 AM »

I was looking out for a capco when I spotted this.  they seem to be very similar machines, I think the capco has a slightly bigger capacity


Andrew,

My Capco is a mighty heavy lump. The table is 640mm long. It's all in bits at the moment but the stroke must be about 550mm. If I had a big mill I'd remachine the dovetails on the table - but I haven't (mine only has a 300mm travel) so scraping is my only option.

Cheers.

Phil.

Phil Fern
Location: Marple, Cheshire

Offline Andrew Wildman

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Re: Surface grinder restoration and scraping
« Reply #7 on: July 02, 2017, 04:00:59 PM »
hi all,
Please find the next in the series below.  BTW I am looking for an old (ideally a bit beaten up - save wasting a good plate) 18" surface plate to cut up to make a straight edge.  Does anybody have anything that they would not mind selling for a fairly low sum?

<a href="http://www.youtube.com/watch?v=5sOd_VIj4Bo" target="_blank">http://www.youtube.com/watch?v=5sOd_VIj4Bo</a>

Offline Pete W.

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Re: Surface grinder restoration and scraping
« Reply #8 on: July 08, 2017, 03:31:18 PM »
Hi there, Andrew,

I've sent you a PM. 
Best regards,

Pete W.

If you can keep your head when all about you are losing theirs, you haven't seen the latest change-note!

Offline Biggles

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Re: Surface grinder restoration and scraping
« Reply #9 on: July 11, 2017, 11:58:21 AM »
Great work Andrew, enjoying the videos.  :clap:

Offline Pete.

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Re: Surface grinder restoration and scraping
« Reply #10 on: July 11, 2017, 12:07:41 PM »
Great project Andrew, I have a Herbert milling machine of similar size, they are quite chunky for a small machine. I also have an identical 48" camelback to yours and they are really heavy to pull about - 33kg I think. The other style 48" with just the round holes are about 33% lighter.

What do you need a 18" straight edge for? I have a 24" you could borrow but it is not a dovetail type.

Offline Andrew Wildman

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Re: Surface grinder restoration and scraping
« Reply #11 on: July 11, 2017, 05:03:58 PM »
thanks all for the offers to borrow straight edges or for various bits of cast iron that people have.  I appreciate the thoughts and may take some of you up on the offers, however I think I may have sourced a suitable plate nearby (Lincoln area).  If I get it I will post a video on machining up and scraping the straight edge.

I think I may be developing scrapers elbow!

Offline stvy

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Re: Surface grinder restoration and scraping
« Reply #12 on: July 12, 2017, 09:20:21 AM »
Andrew,

Please do continue posting about this interesting rebuild. Also if you don't mind please take some shots of the tooling you have made. How I wish I had such a large surface plate!

Thanks,
Steve

Offline Andrew Wildman

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Re: Surface grinder restoration and scraping
« Reply #13 on: July 12, 2017, 04:36:23 PM »
hi stvy,
I will probably focus on some of the tooling as part of some of the future videos.  There are plenty of widgets required to check alignment.  I am hoping that I can do most of them by re using the same parts.  If you search 'kingway' tool you can see some lengths people go to create tooling to achieve correct alignment.  While people enjoy making these tools, often they are more fancy than they need to be to do the basic job.  I just want to get the thing grinding true! :ddb: :ddb:

Offline Biggles

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Re: Surface grinder restoration and scraping
« Reply #14 on: July 19, 2017, 02:34:05 PM »
Re scrapers elbow; :coffee:  I have pondered on whether a standard off the shelf oscillating grinder can be adapted to scrape with the plane blade and some hard steel welded onto the end. I realize this may be a little hard on the work piece but it possibly would take care of any large amounts that need whittling down. Any ideas?  :lol:

Offline Andrew Wildman

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Re: Surface grinder restoration and scraping
« Reply #15 on: July 24, 2017, 04:43:38 PM »
there seem to be a fair number of people made a cheap biax type powered scraper using reciprocating saws, that would probably be the easiest route?