Blanchard grinder

[Wallace]

Nice machine. I heard a story about an operator at Petters who fell asleep, ground a full load of cylinder heads a bit too much and sneaked out of the factory with them on a barrow to throw them off Staines bridge.

 

[awemawson]

Does that place get cross when you drool over the machines and make them rust

 

[daleyd]

We had an enormous Blanchard polisher that was used to grind and polish rolled plate glass when I worked at Pilkington - every couple of years it used to get a refurb as the glass slurry used to cause problems if it wasn’t done. Proper old Brit piece of iron, the electrics were like something out of a Frankenstein film

 

[pressbrake1]

We had an enormous Blanchard polisher that was used to grind and polish rolled plate glass when I worked at Pilkington - every couple of years it used to get a refurb as the glass slurry used to cause problems if it wasn’t done. Proper old Brit piece of iron, the electrics were like something out of a Frankenstein film

American iron! Actually they had a plant here!

 

[pressbrake1]

@pressbrake1

would this grind bench stones flat?

What’s a bench stone?
If you mean granite surface plate it would be nowhere close to required tolerance

 

[daleyd]

American iron! Actually they had a plant here!

I’d assumed it was British because it was so old!

 

[pressbrake1]

Ground oil stone.
I’d use surface grinder to achieve tolerance

 

[mtt.tr]

Unless you do alot of work in the range of tenths then i cant see the point in precision flat stones

 

[pressbrake1]

A good norton oil stone is plenty good.
I think grinding stones is a bit of a YouTube fad based on some fact a way of making stones to tolerance

 

[pressbrake1]

For stoning ways and tables without taking anything off that isn’t high.

More for deburing and almost lapping precision parts.
Wouldn’t last 5 mins stoning tables.
In precision work if you got caught stoning the table on a jig borer you’d be getting the sack as it causes hollows

 

[maz0]

View attachment 228134 A view of the premises

“premises” / Toy shop

 

[pressbrake1]

I was stoning something on the top of the compound the other day and literally just needed to remove a ding but with a normal stone you can see it’s cutting in places it shouldn’t be, hence wanting a set of these ground stones.

It shouldn’t cause any hollows if your just removing burrs, because the surface is dead flat.

To remove anything major I’d use a normal stone.

I don’t think any 60 year old lathes or mills are going to be working to such precision, taking a ding off a way our in my case the spindle nose on the Harrison could make a decent improvement.

Just by repeated rubbing a stone will cause hollows, especially on a scraped bed like a jig bore or jig grinder I’m talking from nearly thirty years experience of machine tool repair
A normal good quality stone is pretty good
I’d bet if you put your compound on a blued surface plate it would shock you how out of flat it is!

 

[mtt.tr]

I need to get some new stones.

Id test them when I get some but I don’t have a surface plate yet.

Norton are without doubt the best india oil stones available for what it is worth

 

[grim_d]

Unless you do alot of work in the range of tenths then i cant see the point in precision flat stones

I wasn't sold on them until I watched Robin Renzetti's video on them, thatl open your eyes.