Surface Plates

  1. daedalusminos Member

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    1,074
    Location:
    Norwich
  2. pressbrake1

    pressbrake1 Forum Supporter

    Messages:
    2,884
    essex england
    I wouldn’t say cheap, just realistic.
    Buy the biggest you can to give working room
     
    RobCox and daedalusminos like this.
  3. Pete.

    Pete. Member

    Messages:
    9,816
    Location:
    Kent, UK
    I think that Tiggy_Dorset bought a new one of those. Pretty sure we put a repeat-o-meter and an autocollimator on it and couldn't get any variation of reading, in other words it was flatter than our ability to measure. I expect that a professional could map it out but it was the only plate we couldn't see any variance in.
     
  4. daedalusminos Member

    Messages:
    1,074
    Location:
    Norwich
    Ok, surface plate on the way, could do with some 'UK' advice on hand scrapers - most of what I've read so far is from Practical Machinist and many of the items aren't readily available over here. I know @spencer 427 does a fair bit of hand scraping but any advice welcome, I could make my own but looks like the inserts (Sandvik) are still about £35 ea, Sandvik produce a hand scraper though reports from across the pond are that it's too stiff, likewise with the Rennsteig. I've heard great things about the Biax hand scraper but have not seen it for sale.
     
  5. 8ob

    8ob Forum Supporter

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    6,705
    Location:
    moscow on thames
    If you really want a challenge I could flame cut you a square of 1" thick road plate.:scared:

    Start the car.

    Bob
     
  6. Brad93

    Brad93 M J B Engineering

    Messages:
    10,397
    Location:
    Essex
    Old eclipse scraper may be better
     
    spencer 427 likes this.
  7. spencer 427 Member

    Messages:
    7,008
    Location:
    uk colchester
    I have a few scrapers. The sandvik one I have and it is a little on the stiff side. The other scrapers I have a forum member kindly made them for me and they are nice.
     
  8. Brad93

    Brad93 M J B Engineering

    Messages:
    10,397
    Location:
    Essex
    Did anyone end up getting that surface plate the other week, the big granite one for £200 or whatever it was
     
  9. pressbrake1

    pressbrake1 Forum Supporter

    Messages:
    2,884
    essex england
    Depends if you’re trying to replicate the yank style scraping, digging in and flexing out. We would have got a stick across the knuckles for that
    I’ve been doing it thirty years and have no preference. Where it’s become a hobby there are more products, we just used what we were given I’ve got a sandvick scraper I’ve had since I was 17 and carbon steel scrapers I’ve made for tickling tight spots
    Some like 5°neg rake I use 4°
    My pal lurk on here makes scrapers with nice wooden handles
     
    slim_boy_fat likes this.
  10. pressbrake1

    pressbrake1 Forum Supporter

    Messages:
    2,884
    essex england
    Possibly Scam as number given had funny ring tone and person who answered had poor English and all the background voices were non English
     
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  11. Brad93

    Brad93 M J B Engineering

    Messages:
    10,397
    Location:
    Essex
    Oh
     
  12. spencer 427 Member

    Messages:
    7,008
    Location:
    uk colchester
    Also everyone kind of develops their own style given how they hold the scraper. I also been teaching myself to scrape with both my left and right hands/arms.
     
  13. ronan

    ronan Forum Supporter

    Messages:
    10,268
    dublin
    Stefan Gotteswinter on youtube has a couple of very good videos on scraping. He makes up a little straight edge for a friend and scrapes it. He has the biax though, at £1,500 +, its a bit much for hobby use.
     
    Hopefuldave likes this.
  14. Matchless

    Matchless I started with nothing, still have most of it left

    Messages:
    1,626
    Location:
    Essex UK
    I have a granite surface plate, 14"? square 4" thick from memory, very heavy! will never use it.....
     
  15. daedalusminos Member

    Messages:
    1,074
    Location:
    Norwich
    Thanks all for the info. will probably go Rennsteig initially for the hand scraper with a view to making my own when I get the hang of it - will need something custom for the dovetails anyway. Is this the type of disc needed to re-grind the edge on the tungsten...

    https://www.ebay.co.uk/itm/4-6-Coat...382736?hash=item263a91acd0:g:j2gAAOSwMiFetk2D

    Assuming I can just make a backing disc and mount on my regular bench grinder with a custom 'end-face' fixture?
     
  16. Pete.

    Pete. Member

    Messages:
    9,816
    Location:
    Kent, UK
    Your bench grinder will turn it far too fast. You want a 1500 grit disc turning at about about 400rpm for lapping an already-made edge. For profiling your radius you want about 320 grit.
     
    Brad93 likes this.
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