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Thread: THE GRIZZ

  1. #25
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    Default Re: THE GRIZZ

    Quote Originally Posted by SCzEngrgGroup View Post
    I really hope I'm misunderstanding your oiling system.... It appears to me you're either running all the oiling circuits in series, or perhaps just all feeding off common manifolds? If either of these is true, it is not going to work. The oil will take the path of least resistance, which means the oil will all go to the first outlet, and the one further away from the source will never get oiled. This is why oiling systems always contain some form of flow-control, to balance the delivery to all the circuits.

    Regards,
    Ray L.
    Ray,

    Thanks for the note...I had a feeling I'd hear from you. You haven't misunderstood, they are running off a common manifold, just like my Bridgeport does, and with no flow control or metering valves either. You're absolutely correct, the oil will take the path of least resistance, but in the end, all points will get oiled, some more than others, but all will get oil. I'd say we accomplished what we set out to do, a low-tech but functional oiling system for a machine that came from the factory with no oiling system.

    As we use the system and if it becomes obvious there is a serious lack of oil at the points furthest from the pump, simple restrictions can be installed in the lines nearer the pump...no rocket science here!



    Stuart

    Last edited by atomarc; 12-24-2016 at 03:23 PM.


  2. #26
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    Default Re: THE GRIZZ

    I've never seen a Bridgeport without metering/check valves in every circuit. In fact, I've never seen ANY machine with a multi-circuit single-point oiler that didn't have metering and check valves to balance the flows. I can tell you from personal experience it will work VERY poorly without some explicit flow control. The pressures are very low, and without metering valve, once the oil is past the first port, there will be essentially zero pressure to any downstream ports.

    That said.... Personally, I think single-point oilers are basically a PITA. Most are near useless. I ripped all mine out, and replaced the whole system with individual feeds to each oiling point, and all the lines leading to a single multi-way selector valve (14 ways in my case) fed by a pressurized oil reservoir. I can now control exactly how much oil goes to each circuit, and how often, and have NO metering or check valves to clog and fail. It works sooooooo much better....

    Regards,
    Ray L.



  3. #27
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    Default Re: THE GRIZZ

    Ray,

    It's a done deal now so were going to keep our fingers crossed...sort of treat it like the main bearing lube system on a '55 Chevy...one pump with lots of holes and plenty of oil to all. I'll take pix and report back.

    Stuart



  4. #28
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    Default Re: THE GRIZZ

    Quote Originally Posted by atomarc View Post
    Ray,

    It's a done deal now so were going to keep our fingers crossed...sort of treat it like the main bearing lube system on a '55 Chevy...one pump with lots of holes and plenty of oil to all. I'll take pix and report back.

    Stuart
    One REALLY big difference - that Chevy has a lot of pressure, and a TONS of flow rate. It's designed to be "leaky", and will always deliver far more oil than needed. This oiling system is low pressure, and VERY low flow.

    Regards,
    Ray L.



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    Default Re: THE GRIZZ

    Ray,

    We're going to use the oil pump out of a '57 Bel Air...and lots of absorbent pads. We have a 'git-r-done' attitude up here in the land of the Redwoods.

    Merry Christmas.

    Stuart



  6. #30
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    Default Re: THE GRIZZ

    Actually, a one shot oiler is pretty high pressure. Upwards of 200 psi, but it is low volume.



  7. #31
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    Default Re: THE GRIZZ

    Got the Z axis screw fit and running true today. Put the column onto the base to start planning for a motor mount and pulley diameters / belt length. Its exciting to see the project taking shape!






























  8. #32
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    Default Re: THE GRIZZ

    Did some work on the motor mount arrangement..... Got the "foundation" laid so now i can figure out what the plan will be for the rest of it.... Used the pre existing M6x1 holes on the head casting to mount the aluminum rails.

























  9. #33
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    Default Re: THE GRIZZ

    That motor mounting will help stiffen your head spacer.

    Keep the updates coming.

    I'm envious of the access to a bigger mill. I'd do a lot of mods to my machine if I had access to another mill.

    7xCNC.com - CNC info for the minilathe (7x10, 7x12, 7x14, 7x16)


  10. #34
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    Default Re: THE GRIZZ

    Thanks for the note. None of this would have been imaginable if didn't have the larger machine to build the smaller machine..sort of ironic in a way. Watching this Grizz make parts all by itself will be a new treat for me. I'm used to turning handles to make things happen.

    Stuart



  11. #35
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    Default Re: THE GRIZZ

    Friday update. Worked on the motor mount and rails. Made some clearance for the soon to be pulley on the motor.


    (cutting rails on motor mount)











    (milled cutouts for clearance.... should give room for the motor pulley and some adjustment back for belt tension)



    (showing the recess previously machined. plate will fit between the rails)



    (picture shows the 80mm counter-bore that the motor to sits in)




  12. #36
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    Default Re: THE GRIZZ

    Saturday - Finished the motor pulley hub. We made the hub out of steel, broached a key way slot in it, drilled and tapped some holes for the pulley to bolt to it. The hub is a shrink fit onto the motor shaft. I'm sure the shrink fit would of been more than enough to prevent any movement of they pulley, but the motor shaft came pre-tapped for a M6 bolt so a washer was made for the end of the shaft to finish it all off.


    (Hub after being broached)




    (setting up to index the 3 tapped holes of the hub)




    (Finished hub after being shrink fit to motor shaft)




    (Picture shows the "end cap" retainer.... (nice surface grinder finish!!!!))








    (making square aluminum round aluminum)




    (the now round aluminum that will become 2 pulleys)


    Thanks! More to come tomorrow.



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