collapse

Author Topic: Repair Big R double grinder  (Read 298 times)

Zircon

  • ALF'er Bronze Member
  • *
  • Posts: 6
    • View Profile
    • Email
Repair Big R double grinder
« on: December 30, 2020, 03:13:20 PM »
Hi,
     Can anyone recommend someone to replace bearings in a double grinder from Big R. Commercial rate paid, preferably Southern Suburbs of Melbourne.
Thank you,
                 David

Rusted

  • ALF'er Platinum
  • *
  • Posts: 488
    • View Profile
    • Email
Re: Repair Big R double grinder
« Reply #1 on: December 30, 2020, 04:20:03 PM »
If that isn't attached to a bench take it into any local engineering workshops, if you can find one that isn't on holidays.
You might be able to do it yourself, I think the bearings are attached to the shaft with a couple of grub screws, find the correct allen key undo the grub screws, you will also need to undo the grub screw on the pulley, clean any rust or gunk off the shaft, give a squirt of WD40 between the shaft and bearing and then gently tap the shaft out with a soft hammer. Don't bruise the ends of the threads or you will never get the nuts back on again.

Zircon

  • ALF'er Bronze Member
  • *
  • Posts: 6
    • View Profile
    • Email
Re: Repair Big R double grinder
« Reply #2 on: December 31, 2020, 12:16:11 PM »
Thanks Rusted,
                      There's a metal spacer collar jammed on the shaft. It will need to come off and I was a bit hesitant to attack it with a small grinder. Will have another attempt.
Happy New Year
David

Rusted

  • ALF'er Platinum
  • *
  • Posts: 488
    • View Profile
    • Email
Re: Repair Big R double grinder
« Reply #3 on: January 01, 2021, 08:07:43 AM »
Try some heat on the spacer, you need to get a lot of heat quickly onto the spacer so that it expands, once the heat soaks through to the shaft you are back at square one as the shaft will expand too, clean the shaft back to shiny metal first. Also try tapping with a small hammer all the way around the collar to break any rust or crud holding it on.

Zircon

  • ALF'er Bronze Member
  • *
  • Posts: 6
    • View Profile
    • Email
Re: Repair Big R double grinder
« Reply #4 on: January 11, 2021, 12:09:21 PM »
Thanks everyone for the advice. I tried all suggestions but was stymied. Then I went to "Jack McNamara" an AutoTransmission Repairer in Moorabbin. The owner was amazing, a real expert on anything machinery. He found a hidden circlip. All repaired overnight. David

Tags:
 

* Sponsor

HTML Online Editor Sample

ALF is hosted by Aussie Sapphire as a free service to the Lapidary community.

Visit our website here
Phone 1800 50 21 40
Or find us on Facebook

Recent Activities

Unknown Faceting Machine by Rusted
[Today at 12:18:12 PM]


Repair Big R double grinder by Zircon
[January 11, 2021, 12:09:21 PM]


Diamonds down by harryopal
[January 03, 2021, 12:56:04 PM]


Parts for polymetric faceting machines by Sharyn
[January 03, 2021, 11:57:07 AM]


Topaz Tec XT6 for sale by Dihusky
[January 01, 2021, 09:23:23 AM]


Trying to find value of Gemstone for my father by loscarlett1
[December 31, 2020, 06:12:46 PM]


Tell him he's dreamin by steve f
[December 31, 2020, 02:15:50 PM]


Finding rocks/gems in Whyalla south australia by Pete49
[December 27, 2020, 01:52:30 PM]


My book volume 3 by MakkyBrown
[December 26, 2020, 08:02:00 PM]


Cape Liptrap Prospecting by ev4n0ne
[December 21, 2020, 08:50:53 PM]


Hughes creek in Victoria by wallie
[December 21, 2020, 03:01:37 PM]


Hi People, a newbie on all fronts... by digitaus
[December 16, 2020, 07:37:57 PM]

* Calendar

January 2021
Sun Mon Tue Wed Thu Fri Sat
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 [18] 19 20 21 22 23
24 25 26 27 28 29 30
31

No calendar events were found.
Sorry! There are no calendar events available at the moment.

* Who's Online

  • Dot Guests: 86
  • Dot Hidden: 0
  • Dot Users: 0

There aren't any users online.

* Find us on Facebook

* Forum Stats

  • stats Total Members: 4451
  • stats Total Posts: 56664
  • stats Total Topics: 6050
  • stats Total Categories: 6
  • stats Total Boards: 27
  • stats Most Online: 773