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Type: Posts; User: shedeng

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  1. Replies
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    A bit of trivia re keyless drill chucks....if...

    A bit of trivia re keyless drill chucks....if they get any form of lubrication in the workings they lose the locking capabilities.
    The screw thread that pushes the jaws forwards to grip a drill has...
  2. Replies
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    Two of the most important properties for a lathe...

    Two of the most important properties for a lathe bed are torsional stiffness and bending stiffness and a piece of channel used for that purpose achieves neither.

    Robert
  3. Think of the boring head as a spin dry and what...

    Think of the boring head as a spin dry and what happens to liquids in a spin dry.
    Remembering to oil it before every use just doesn't happen especially if more than one gets to use it.
    Grease...
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    The jaws of the vice are parallel to the stroke...

    The jaws of the vice are parallel to the stroke as the stroke is always more the the capacity of the vice.

    Robert
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    Here is another to try. Rydell Industrial...

    Here is another to try.

    Rydell Industrial (Belting) Co.

    Robert
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    I think they be special purpose spade drills. No...

    I think they be special purpose spade drills. No pre drilling needed.
    There is too much variation of the shanks to be router bits.

    Robert
  7. Replies
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    Hi Neevo. Look up 'Spieth precision...

    Hi Neevo.

    Look up 'Spieth precision locknuts.
    Not that I think you should buy one and use it but that you note how and why they work and maybe modify the lock nuts you have to work the same...
  8. Replies
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    Hi Neevo. If you are going to be sharpening HSS...

    Hi Neevo.
    If you are going to be sharpening HSS materials you should be using CBN grinding wheels rather than diamond.
    Diamond for carbides.

    If you have used an SO grinder seriously clones...
  9. Thread: Dividing Head

    by shedeng
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    Dero it is for differential indexing. If you...

    Dero it is for differential indexing. If you google "differential indexing using a dividing head" there are youtube clips that explain better than I can.

    Robert
  10. Thread: Leaking

    by shedeng
    Replies
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    2,328

    Loctite requires a gap of about 0.1mm to work and...

    Loctite requires a gap of about 0.1mm to work and reach full strength.
    If you need accurate location you need to add a shallow groove to allow the polymerisation to take place.

    Robert
  11. Thread: Unknown Tool

    by shedeng
    Replies
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    1,893

    I worked a Italian Pear ratio pantograph for a...

    I worked a Italian Pear ratio pantograph for a couple of years many moons ago and that was capable of about 15,000 rpm when wound up.
    I am still amazed at how hard you could work a .25" dia. D bit...
  12. Thread: Clamp setup

    by shedeng
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    For a one off it worked and that is all that...

    For a one off it worked and that is all that matters.

    Robert
  13. Replies
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    I think droog is heading in the right direction...

    I think droog is heading in the right direction but instead of grease I would use bees wax.
    The pressure when you strike the drift is such that not all is lost through the slot in the roll pin.
    ...
  14. Some trivia. The thread on the spindle that...

    Some trivia.
    The thread on the spindle that pushes the jaws forwards should be kept dry. If it does get any lube it won't self lock properly.

    Robert
  15. Replies
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    That to me looks like the seat an insert would...

    That to me looks like the seat an insert would sit on not the actual insert.
    I suspect that the insert would be clamped fro the top not by a counter sunk screw.

    Robert
  16. Thread: Welding Table

    by shedeng
    Replies
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    4,797

    I think the machine when new would have had grub...

    I think the machine when new would have had grub screws fitted to those holes to keep dirt out when not using the vertical head.
    The original screws, probable lost, just replaced with threaded rod...
  17. That looks like a product that was made by a...

    That looks like a product that was made by a company called Fring Engineering that used to be in Bayswater.
    I don't think they are still in business though.

    Robert
  18. Replies
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    Mmm I should have thought a bit more on the...

    Mmm I should have thought a bit more on the problem.
    No need to set the dividing head at 45 degree just advance x .0131" per 3 degree of rotation.

    Robert
  19. Replies
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    Interesting problem. What I would try is...

    Interesting problem.
    What I would try is mounting a dividing head at 45 degree to the X axis and find the center of your 1/2 " rod and drill an 1/8" hole through.
    The circumference of 1/2" is...
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    I'm older than most trees too but even so I found...

    I'm older than most trees too but even so I found this fellows explanation of what you can do to manipulate metal informative.

    https://www.youtube.com/watch?v=w1XPDzunbY0

    Robert
  21. Replies
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    I agree with 900RPM but your feed should be...

    I agree with 900RPM but your feed should be 0.07mm to 0.1mm per tooth which puts the feed around 300mm/min.
    I would check to see if all the tips are in line axially and radially.
    Carbide hates to...
  22. Replies
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    Drill the center and tap M8-M10 . put a screw in...

    Drill the center and tap M8-M10 . put a screw in to push against the shaft. hopefully there will be enough thread length left.

    Robert
  23. Thread: Straight Edge.

    by shedeng
    Replies
    10
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    5,562

    That is a knife straight edge. It would be hard...

    That is a knife straight edge.
    It would be hard but not impossible to use it get a surface flat without twist but a good 30cm steel rule would do almost as well and if you don't have one already...
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    G'day Ray-s, I have had my Rexman for 55 years...

    G'day Ray-s, I have had my Rexman for 55 years and never run it in the back gears for the same reason your friends machine won't run...missing teeth.
    However the drive pin on my machine screws in...
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    Turn down a piece in the chuck to the same...

    Turn down a piece in the chuck to the same diameter as the quill, then bring the quill close to it and measure using a dial test indicator mounted on the saddle.
    Using this method you can check...
  26. Replies
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    Looks to me like your end mill has slight run...

    Looks to me like your end mill has slight run out.
    If you know your feed rate and spindle speed and can measure the pitch of your lines it should work out to be one line per rev.

    Robert
  27. Replies
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    Fixing your motor to the column how do you cope...

    Fixing your motor to the column how do you cope with the 150mm to 200mm rise of the spindle...motor tilt won't do it.
    I think that the motor has to be mounted somehow to the spindle carriage so belt...
  28. Well Bill looks like I have to eat my words as...

    Well Bill looks like I have to eat my words as that looks better than the original planed surface.
    But....if you have soooo much time to spend on that you don't have enough projects.
    :D
    Robert
  29. It looks to me like the table top surface is...

    It looks to me like the table top surface is planed rather than ground which really means it will never look much better.
    I use a fine stone on my table surface to remove small dings not to made it...
  30. Replies
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    I have found using either a tap wrench or T...

    I have found using either a tap wrench or T wrench on small taps you loose the sensitivity you need.
    What you need to make first is a guide to keep the tap square... a piece of aluminium 20-25mm...
  31. Thread: Tapered Gibs !

    by shedeng
    Replies
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    3,716

    Before trying to make a new gib I would try...

    Before trying to make a new gib I would try straightening it by peening with a cross peen hammer or even a welding slag hammer.
    Work on the convex side of the gib by putting straight line bruises...
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    I have sourced high content silver solder from...

    I have sourced high content silver solder from Johnson Matthey (Aus) Ltd
    Also known as Noble Metals Australia
    Tel: 03 9344 7700
    64 Lillee Cres. Tullamarine 3043

    matthey.com

    Robert
  33. Replies
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    In the past I have sourced high content silver...

    In the past I have sourced high content silver solder from Johnson Matthey (Aus) Ltd.
    Also called Noble Metals Aus.
    Tel: 03 9344 7700
    64 Lillee Cres. Tullamarine 3043
  34. Replies
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    Hard to see from a photo but I see very little...

    Hard to see from a photo but I see very little evidence of wear on the thrust face in the 3rd photo.
    Looks like you have made a good buy.

    Robert
  35. G'day, you might try J.J.Davies & Sons 1299 North...

    G'day, you might try J.J.Davies & Sons 1299 North Road Huntingdale. They have a large range of felts of all sorts.
  36. Replies
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    What you have to remember is that the machine...

    What you have to remember is that the machine will do exactly what you tell it...which isn't what you thought you told it.

    Robert
  37. Replies
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    Hi Ken, I would try Keables P/L in Melbourne. In...

    Hi Ken, I would try Keables P/L in Melbourne.
    In the past they have been able to supply hard to find fasteners.
  38. Replies
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    I would say yes...but you will need 2 pieces of...

    I would say yes...but you will need 2 pieces of ply as it's hard to re position one with a 660 kg mill sitting on it.
    The transition from one sheet of ply to the other is where you might have a...
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    No. Much better to have a tilting angle plate. ...

    No.
    Much better to have a tilting angle plate.

    Robert
  40. Replies
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    I was thinking of using hypodermic needles for...

    I was thinking of using hypodermic needles for orifices for an air bearing I was toying with.
    Fitting one inside another till the OD reached a size I could cope with.
    The smallest needle ID is...
  41. Thread: D Bit Grinder

    by shedeng
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    6,184

    OldRustyToolie, Didn't see that attachment,...

    OldRustyToolie,
    Didn't see that attachment, changes everything I said.
  42. Thread: D Bit Grinder

    by shedeng
    Replies
    15
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    6,184

    That is a rough copy of a Deckel type SO D bit...

    That is a rough copy of a Deckel type SO D bit grinder.
    Deckel Grinders cost 5-6 times as much for the same capacity so quality IMHO is suspect for something that cheap.
    It should be noted that...
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    Totally agree.

    Totally agree.
  44. Any material that has been permanently deformed...

    Any material that has been permanently deformed has passed its yield point and is on its way to failure.
    Straightening it brings that failure closer.
  45. Michael was there any noise occur when this...

    Michael was there any noise occur when this happened.
    Could it be that the reduction gear set up has locked its self some how.
    As for sourcing the bearings there is NTN NSK SKF FAG Nachi all supply...
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    Won't one be running backwards.

    Won't one be running backwards.
  47. Replies
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    Michael, when you make a flat rosette it should...

    Michael, when you make a flat rosette it should always be an uneven number of teeth because if you make your first cut and then traverse across to the other side you will cut the back face of...
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    Peter, are they encoder discs or something more...

    Peter, are they encoder discs or something more exotic?

    Robert
  49. Thread: Saw Drift

    by shedeng
    Replies
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    1,850

    Generally when a band saw blade starts to wander...

    Generally when a band saw blade starts to wander like that one edge of some or all of the teeth have been damaged.
    If you remove the blade and check the corners for bright spots on the side the cut...
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    To my mind you have the top rake running the...

    To my mind you have the top rake running the wrong way.
    At present the top rake is at 90 degree to the face plate surface in the plane of the cut. Try making it about 10 degree and polishing the...
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