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  1. #1
    Join Date
    Oct 2015
    Location
    melbourne
    Posts
    175

    Default Angle grinder wear..

    I noticed a few weeks ago my 'goto' makita angle grinder had a lot of play in the front bearing. Not happy, it's barely over 30 years old.

    I finally pulled it apart and this is what I found..

    Pretty sure it is supposed to be a dual seal, absolutely no sign of one of them, and the ball cage is completely destroyed. The races seem to have grooves both sides for the seal.

    I think it is a 6201 2rs. No marking on the bearing, a suspicious mind says it was ground off to force buying expensive spares...
    The remaining seal says ntn Japan and what looks like 82OILS.

    (I measured the shaft @11.94, the outer @ 31.94). I checked the brushes, looks like a bit of life left in them still.
    I did get a quote when I first realised the wear, around $15 as a spare part, $6 as a 6201. Angle grinder wear..


    -russ

  2. #2
    Join Date
    Aug 2010
    Location
    Near Bendigo, Victoria, AUS
    Age
    67
    Posts
    2,574

    Default

    I think that's warranty claim. I'm pretty sure the warranty on Makita tools in 1988 was 35 years.....
    BTW, who remembers the slogan of that year? "Mass debate in '88"
    Cheers, Joe
    again completely retired - more time to contemplate projects and spend more shed time....

  3. #3
    Join Date
    Oct 2015
    Location
    melbourne
    Posts
    175

    Default

    Quote Originally Posted by jhovel View Post
    I think that's warranty claim. I'm pretty sure ehe warranty on Makita tools in 1988 was 35 years..
    I'm sure consumer affairs will back me on that...

    [QUOTE ]
    BTW, who remembers the slogan of that year? "Mass debate in '88"
    Angle grinder wear..[/QUOTE]

    To misquote doc Brown, was there something wrong with gravity in 88? Angle grinder wear..


    -russ

  4. #4
    Join Date
    Oct 2007
    Location
    Alexandra Vic
    Age
    63
    Posts
    450

    Default

    Quote Originally Posted by russ57 View Post

    To misquote doc Brown, was there something wrong with gravity in 88? Angle grinder wear..


    -russ
    Actually as I recall my secondary and tertiary physics, mass is independent of gravity, and weight is a function of gravity acting upon mass. But I last formally studied this more than 40 years ago, and my memory has had a few lapses since.
    I used to be an engineer, I'm not an engineer any more, but on the really good days I can remember when I was.

  5. #5
    Join Date
    Oct 2015
    Location
    melbourne
    Posts
    175

    Default

    So, success, at least at first sight. Washed out old grease, Bearing arrived, fitted in neatly. Only took an hour or so to find the woodruff key that dropped on the floor.Angle grinder wear.. All buttoned up and runs smoothly. Haven't tried under load yet


    -russ

  6. #6
    Join Date
    Aug 2008
    Location
    Bendigo
    Age
    45
    Posts
    573

    Default

    cmon there is still a few balls left in that bearing!!!

    But seriously, it aint getting any easier to find stuff that's made as good as it used to be.
    www.lockwoodcanvas.com.au

    I will never be the person who has everything, not when someone keeps inventing so much cool new stuff to buy.

    From an early age my father taught me to wear welding gloves . "Its not to protect your hands son, its to put out the fire when u set yourself alight".

  7. #7
    Join Date
    Oct 2015
    Location
    melbourne
    Posts
    175

    Default

    Quote Originally Posted by jatt View Post
    cmon there is still a few balls left in that bearing!!!

    But seriously, it aint getting any easier to find stuff that's made as good as it used to be.
    Actually I think all the balls are there. What is missing is the cage to keep them spaced out. Well, not missing as much as divided into 8...

    -russ

  8. #8
    Join Date
    Aug 2008
    Location
    Bendigo
    Age
    45
    Posts
    573

    Default

    Must admit I'm guilty of trying to keep my old gear going. Some good old hand me downs amongst em!!
    www.lockwoodcanvas.com.au

    I will never be the person who has everything, not when someone keeps inventing so much cool new stuff to buy.

    From an early age my father taught me to wear welding gloves . "Its not to protect your hands son, its to put out the fire when u set yourself alight".

  9. #9
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    4,332

    Default

    I was given a 9005b model that had a cracked gear casing. My friend was going to bin it and buy another.
    I bought a new housing and replaced the cracked one.

    Long story short I still have it 5 years later and the friend's replacement Makita grinder has bit the dust.
    Old made in Japan Makita tools - love em!

    Grahame

  10. #10
    Join Date
    Dec 2005
    Location
    South Australia
    Posts
    636

    Default

    Two months ago I was given a Makita LS1011 sliding miter saw the owner replaced it because in did not cut square was noisy and it was 20 years old, it was noisy because
    the motor bears had become worn, the bearings cost $12 from CBC , it did not cut square because the fence had moved.
    Hour later and $12 resurrected a item which is better built that the new replacement at $1,110.00

  11. #11
    Join Date
    Feb 2009
    Location
    moonbi nsw Aus
    Age
    64
    Posts
    285

    Default

    I did some renovations for my B-I-L, in payment he asked if I would like his Father's Radial Arm Saw that he had inherited some years before. I didn't run it until I got it home. The B-I-L raved about how the sound of it thrilled him as it demonstrated the power it had. I don't know about demonstrating the power but his father (ex house builder) must have reckoned maintenance was a very low priority. I changed the main spindle bearing then had to change the motor bearings. It is a top quality bit of gear being a Saw Master driven by a GMF 1Hp motor. All I need to do now is clean up and paint to roll back the years on it. It would have to been bought in the 60s. It has been doing a good job for me as it is for 8 years. The new paint job will come in due coarse.....you can't rush these things
    Just do it!

    Kind regards Rod

  12. #12
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    4,332

    Default

    I shudder to think of the amount of once superb tools that have been consigned to the tip because the then current owners did not realise that need for maintenence and/or easily cheaply obtained replacement parts.

    Theres nothing like that warm inner feeling of satisfaction generated by a good tool rescue.

    Grahame

  13. #13
    Join Date
    Feb 2009
    Location
    moonbi nsw Aus
    Age
    64
    Posts
    285

    Default

    When the eldest daughter bought her own place she was a bit strapped for cash and bought a Microwave Oven from BIGW. She only spent $50. It worked for 18 months or so, then stopped working. She was going to bin the thing so I asked her if I could have to get some magnets out of it. Got it home and started to dismantle it to harvest what I could. To get the back off and get inside I had to use 3 different types of "secure" screws with weirdo slots in the head. As I was getting into it, there was a fuse sitting quietly in its holder. I looked at and thought "No, it couldn't be that simple". I stripped a bit of copper wire and put it across the terminals of the fuse holder....yep, that was all that was wrong with it. Bought a new fuse and gave the "dead" microwave back to her.
    Grahame I thought the same as you "How many of these and other appliances are in land fill just needing some minor part to make them operable "
    My 50s model Thicknesser started to drop the circuit breaker. My Electrician mate said it would only be electrical or mechanical. It has a 3Hp 3Ph motor. I pulled it apart and replaced to bearings that where a little grumbly the fault was still there. Old mate came down and we pulled it apart again so he could put his meter over the individual coils. After everything being OK, he found that the insulation on the wires coming out of the coils was brittle and flaking off and contacting the motor chassis creating a short circuit. I slid some new insulation over these wires put the thing back together and it hasn't missed a beat since. I do like these old heavy cast iron machines!!
    Just do it!

    Kind regards Rod

  14. #14
    Join Date
    Oct 2015
    Location
    melbourne
    Posts
    175

    Default

    Not just me then!

    In the spirit of repairing once - good stuff, does anyone have an 'fhp' 780 bevel gauge.
    I have part of one....

    I can replace the blade with a steel rule, but I'd love a picture of the clamping screw. There is a lock screw through the handle that seems to push a pointed end into the clamp screw to lock it.

    I'm guessing it may have a couple of bevel washers in there somewhere.


    -russ

  15. #15
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    4,332

    Default

    Quote Originally Posted by russ57 View Post
    Not just me then!

    In the spirit of repairing once - good stuff, does anyone have an 'fhp' 780 bevel gauge.
    I have part of one....

    I can replace the blade with a steel rule, but I'd love a picture of the clamping screw. There is a lock screw through the handle that seems to push a pointed end into the clamp screw to lock it.

    I'm guessing it may have a couple of bevel washers in there somewhere.


    -russ
    I havent found the broken one I promised you,but I was net surfing and found this one - they still make them apparently.
    250mm SLIDING BEVEL FHP

    That triggered a memory .As the diecast was broken at the joint I now recall that the screw through the body was threaded into the block.
    To lock the bevel, the handle was simply tightened up ,therby locking the bevel. I am still looking I saw it it last year when looking for something else. This is why I don't contribute to those "shows us your shed " posts.The place is a mess.Note to self to stop all projects and clean the place up!!!

    Hell! I can't even see the floor in places.I could win pigsty shed of the year easily.

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