Thread: todays tools gloat

Stuart I'm afraid I don't see your point at all. Jumping up on a table that size, if you're that way inclined, isn't going to do any bearing damage at all. Brinelling is caused by overloading the bearing. False Brinelling is caused by a lack of lubrication. In the story I heard (possibly incorrectly as it turns out) brinelling was said to have been caused. The story I read suggested it was overload caused by the shock loads of the expansion gaps in the rail joints, you copied and pasted that version of the story again above! This is in contrast to vibration as I have subsequently read the story go, it is the latter that leads to false brinelling. The way I understood the story when I read it was the vehicles were incomplete and were craned on to flat-beds to transport to another facility. Quite why they would be sitting on their hubs and not wheels I have no idea, neither apparently did the author, as it seems a fair stretch to the version of events I've now heard. However some strange things have happened over the years* in the auto industry so it's possible that both/neither/or either version of events in fact transpired. But I wasn't there and it's just a story I heard. The point is, they are two completely different bearing failures. An impulse or shock load may cause brinell damage, vibration may cause false brinelling. Neither is especially likely when moving a 2700 kg surface grinder 15 km!

Ewan, just an opinion, but I'd suggest just running the grinder as it is for a while, learn the machine, and then decide whether it's worth upgrading it. I don't think the conversion would be terribly complicated, so it's not like you have the machine in a million pieces and would consider the change while it's apart. When I buy something new to me I always consider that it was working before so there's no good reason it shouldn't work again just as effectively, and if not, then it's my fault and I've screwed something up.

Pete

* To credit all things weird and wonderful in rail transport, google Vert-a-pac, so nothing particularly surprises me any more!

Originally Posted by Stustoys

Sure sounds like false brinelling to me.

If a bearing couldnt survive a train trip without brinelling I wouldnt have though it would last a week on the road anyway?


What brinelling or false brinelling?
Well neither is likely, I believe I said as much(from jumping on the table, unless you have a long time.) But would you?

What value would you put on a surface grinder with a clapped out X way? What would a new set of bearings cost?* Thats the price of an unlikely failure. We are all free to place our own bets.

Stuart

*in fact I'm guessing the bearings would be pretty cheap? but what about the ways?

Hi Stuart,
your inbox is full

Phil

Originally Posted by Stustoys

Well it wouldnt, as it doesnt happen on trains anymore either(as I understand it)

I would assume it coud happen on a truck, IF it was on the truck long enough...... just how long that would be I have no idea. If it took a long distance train trip with "bad" bearings to show up, I'm guessing on a truck with "good" bearings it would be a long long long.... trip. Though maybe below a certain amplitude things go infinite? or at least close to it


Stuart

It is unique that when a subject arises here on these threads how some unexplained things come to light.
A friend visited my workshop last night,he is a fencing contractor.On the back of his 4wd he carries a gen set is about8kva.It is on wheels rubber tired and of Far Eastern origins.I suppose now it would be 5 years old and would have done lots of kms on the back.He showed me a wheel that he had replaced [alas my camera battery was flat]and how the bearings had eaten their way through the hub.I had a good laugh and shared with him the discussion that was going on about bearings here.This would have to be a good indication of bearings of dubious manufacture have done in this case with the constant movement due to the flexing of the aluminium tray sides that the tie downs go over.If I didn't see it with my own eyes you would never believe the fatigue. 0.02 cents worth John.

Originally Posted by Steamwhisperer

your inbox is full

Sorry about that, all fixed, turns out I cant read

Stuart

my gloat for the day is my new grinder picked up yesterday .

johno

Originally Posted by texx

my gloat for the day is my new grinder picked up yesterday .

johno

For those in Adelaide, I noticed that Redwood Machinery on South Road have a heap of these grinders in stock at the moment, new in boxes.

Originally Posted by Gavin Newman

For those in Adelaide, I noticed that Redwood Machinery on South Road have a heap of these grinders in stock at the moment, new in boxes.

I thought they closed down? Will check them out on Monday when I go down that way.
Kryn

Originally Posted by KBs PensNmore

I thought they closed down? Will check them out on Monday when I go down that way.
Kryn

My thoughts exactly. I have not been past them for a long time but will have another look next time I am in town. They are not far from where I stay. I have an appointment in January but I hope it will be sooner than that. I have a pair of speakers on order, due in about a week and a half and this may be the excuse I need. Depends on the freight cost I guess.

Dean

Hi Dean, I'll put up a post when I get back regarding Redwood Machinery.
Kryn

Originally Posted by KBs PensNmore

I thought they closed down? Will check them out on Monday when I go down that way.
Kryn

he's had a "closing down" sign outside his shop for months and months...maybe 12 or more

He will do it one day....the sign is not misleading...he just hasnt said when

I got my Abbott and Ashby from Redwood....was the best price I could find at the time.

When I lived in the big smoke, that was my first go to for any equipment I wanted, new or second hand.
His prices were always reasonable.
Kryn

Here is the 3D taster I got from germany for 80 Euro.. I did have to buy a tip and for some reason the needle is not zeroed properly... It is against the stop though.. Maybe the stop is adjustable somewhere... I might ask on PM forum as many there have experience with them..

Also picked up a mitutoyo Japanese made 0.7-4" 0.0001" dial bore gauge... I am pretty proficient with telescopic gauges but wanted something a bit better for tighter tolerance stuff... Had to pay a bit for it, but much less then new price and it is in excellent condition with nothing missing..

Originally Posted by .RC.

Here is the 3D taster I got from germany for 80 Euro.. I did have to buy a tip and for some reason the needle is not zeroed properly... It is against the stop though.. Maybe the stop is adjustable somewhere... I might ask on PM forum as many there have experience with them..

Also picked up a mitutoyo Japanese made 0.7-4" 0.0001" dial bore gauge... I am pretty proficient with telescopic gauges but wanted something a bit better for tighter tolerance stuff... Had to pay a bit for it, but much less then new price and it is in excellent condition with nothing missing..

Richard,

If your off shore search for Taster adjustability proves fruitful, would you mind letting the rest of us with slightly or not so slightly out of whack Tasters know the outcome.

I like your wooden case. Mine and Michael's were cased in about the flimsiest packaging I've seen. And I've yet to see a cheap dial bore gauge. Well done.

BT

Well Bob tonight I discovered two things.... Firstly by dial bore gauge set is a 0.7 to 6" as the set has a 2" extension bar in it...

Secondly you can adjust the dial zero position by the 4 screws that hold the bezel in... I found those tiny set screws on mine were loose, that is why the needle position was not sticking straight up... Tightening them moves the needle all over the place so you tighten them to get them into what position you want...