Qualters & Smith 6” Power Hacksaw

  1. Dieselkid 63

    Dieselkid 63 Antipodean Tinkerer

    Messages:
    4,010
    Location:
    Wellington, New Zealand
    You can put a notch in the cast where the screws should line up with.

    Thanks for the kind words. Lots more to do so lots more updates (:
     
    slim_boy_fat likes this.
  2. Dieselkid 63

    Dieselkid 63 Antipodean Tinkerer

    Messages:
    4,010
    Location:
    Wellington, New Zealand
    Just had a look through the manual to try and figure out how to disassemble the relief cylinder, in the list of extra equipment is an isolator switch... I suppose it is from the era of seatbelts being optional extras too!
     
  3. Dieselkid 63

    Dieselkid 63 Antipodean Tinkerer

    Messages:
    4,010
    Location:
    Wellington, New Zealand
    Minor progress today. Primed the tin catchplate for the relief cylinder. Fitted the steel block which holds the locking lever on.

    I stripped the relief cylinder so I can begin making a new seal for the piston and fix the broken springs inside. I’m using the newly primed bath as a tray for the parts which is handy. The pivot pin which holds the cylinder was really smashed up and the thread was damaged too. It needed filing to fit the nut smoothly again. There are a few like this on the machine that were very hard to remove so I’m expecting to do more of this. The end was filed flush too.
     
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    spencer 427 likes this.
  4. Dieselkid 63

    Dieselkid 63 Antipodean Tinkerer

    Messages:
    4,010
    Location:
    Wellington, New Zealand
    All of the threads on the machine are UNC. Except one. The pivot pin which holds the automatic cutoff in place.

    Why does this need to be a different thread to the rest of the machine? And why was it so poorly cut thatbit needed re-threading with a 1/2” BSW die? Answers we will never know. The good news is it’s all working properly again, took a bit more effort than I first thought though.

    I have found a motor for my saw I think. It’s cheap and old, should fit right in with the old thing. I’ve decided since I’m getting one side of sheet metal I may as well get the other re-made too, saves faffing about cleaning it up.
     
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    spencer 427 likes this.
  5. Dieselkid 63

    Dieselkid 63 Antipodean Tinkerer

    Messages:
    4,010
    Location:
    Wellington, New Zealand
    I made a short video showing the operation of the relief cylinder, I’m turning it by hand

     
    Rig Pig likes this.
  6. Dieselkid 63

    Dieselkid 63 Antipodean Tinkerer

    Messages:
    4,010
    Location:
    Wellington, New Zealand
    An actual power test! And she’s quiet too! I filled all the bronze bearings with grease and the eccentric with oil, then put some power through it. It’s working very nicely. The slight knocking went away after a bit more grease - I thought one bearing was full but the gun had actually run out!

     
    RonA, slim_boy_fat and Rig Pig like this.
  7. Dieselkid 63

    Dieselkid 63 Antipodean Tinkerer

    Messages:
    4,010
    Location:
    Wellington, New Zealand
    So today I did a test of the hydraulic relief cylinder and decided to completely rebuild it, seals and all.

    And it works! I need to tweak a few things but that’s to be expected. I would like the spring to be fixed/replaced, but for now after I bodge fixed it it kind of works.

    It all makes sense to me now. The relief cylinder pumps the bow up after the cycle, but the lock lever will need to be applied otherwise it will just drain out as the eccentric is no longer pumping once the machine is switched off.
     
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  8. spencer 427

    spencer 427 Member

    Messages:
    5,701
    uk colchester
    Location:
    uk colchester
    Nice job mate... looking at this is kind of giving me a bit of persuasion to get mine done.
     
    brightspark likes this.
  9. brightspark

    brightspark Member

    Messages:
    26,204
    Location:
    yarm
    yea it prompted me to dig mine out. its half stripped cleaned and half painted just needs putting back together
     
    spencer 427 likes this.
  10. Dieselkid 63

    Dieselkid 63 Antipodean Tinkerer

    Messages:
    4,010
    Location:
    Wellington, New Zealand
    Interesting that the mechanism is different on both saws yet they perform the same job.
     
  11. Dieselkid 63

    Dieselkid 63 Antipodean Tinkerer

    Messages:
    4,010
    Location:
    Wellington, New Zealand
    When I cleaned the chip tray with the rust killer liquid, I also slathered the vice ways with it. As it happens, the liquid leaves behind a galv film. No good, very rough - ready for paint... so today I decided to sand it off and oil up the ways. I also used a drill to dig out the clag from the vice lug holes. Lots of brass chips in there!

    I have a little less on now so I’m trying to revisit and finish some of these project machines!
     
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  12. Dieselkid 63

    Dieselkid 63 Antipodean Tinkerer

    Messages:
    4,010
    Location:
    Wellington, New Zealand
    The vice halves were drenched in paint and had paper glued to the jaws, I couldn’t be bothered using gallons of stripper so I threw them into the wood burner and left them to cook for thirty mins or so. A great result I might add - wire brushing them whilst they were still hot got everything back to bare metal.

    I had to do the little carriage that slips under them too. No soft jaws so I’m using brass here to free them. The threads were quite damaged up top, so a little dressing was needed.

    I didn’t replace the nuts and washers as they work fine, and tbh I quite like the work-hardened look of them! The jaws are pretty knocked about so it would look strange to see something all shiny up top, in my opinion.
     
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    RonA, brewdexta and eLuSiVeMiTe like this.
  13. Dieselkid 63

    Dieselkid 63 Antipodean Tinkerer

    Messages:
    4,010
    Location:
    Wellington, New Zealand
    Still going on this project!

    Hunted down what was sold as a ‘cast iron air compressor attachment’ in a trendy vintage shop. It’s not anything to do with air - it’s a suds pump! Hooray! A massive Soviet one which fits neatly inside this old pan I’ve been refusing to throw out - couldn’t have planned it better! The 3ph pump fits snugly inside the iron frame and runs off the capacitor trick. I’m happy with this.
     
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    Last edited: Jul 31, 2019
    Rig Pig, slim_boy_fat, Seadog and 4 others like this.
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