Inside Diameter 40mm Weight 740g it fits on shafts and costs a shed load of money.
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The measurements: Height 40mm
Inside Diameter 40mm Weight 740g it fits on shafts and costs a shed load of money.
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Much depends on the tollerances, and number to be produced. With CNC, the first would cost £400 and about £3 thereafter
tolerences dont have to be that good Its pretty much a universal fit.
[Edited on 15-2-05 by mangogrooveworkshop]
What is it? And whats it made of? Then someone may be able to give you a better idea...
David 
quote:
Originally posted by Mark Allanson
Much depends on the tollerances, and number to be produced. With CNC, the first would cost £400 and about £3 thereafter
Yes CNC machines can do tapping. Very quickly, efficiently and accurately...
That part would be made in 3 main operations i reckon;
It would be turned/ground to the final dimensions.
The holes would be drilled and tapped for the bolts.
Then it would be slit using a very thin (<0.5mm) slitting wheel.
The out of round caused by the slitting is very small, and would actually not affect the performance of the part.
This is the way similar parts to that were produced at a bearing company i was working at over the summer... actually they were bearing inner and
outer races. Slit after all of the final grinding etc...
Cheers,
David
[Edited on 15/2/05 by flak monkey]
It also depends on the desired material - if it's phosphor-bronze (it looks like it might be) it can be a real bar-steward to machine. If
it's brass it's a doddle.
rgds,
David
Have you tried your local bearing suppliers ?
I would doubt that it would be cut in half?In my experiance it would be made from 2 bits of plate and turned down together .Whats it for ?and what does it need making from?
That's a very basic question which I think was done intentionally...
There are many factors involved in costing that job...
quote:
Originally posted by Hellfire
Just for the record - I'd split larger material first, then drill, counterbore and tap, fasten two halves together then turn and bore it to keep it all round and concentric.. which is good if it's spinning.
Just my opinion
Looks like a harmonic damper, for drive shafts on FWD cars.
Harmonic damper = Lump of metal, whose mass is tuned to minimise vibrations.
How mucha da costa??
Looks like one of our rollers off a print finishing machine,if so yes they are a fortune to buy from machine suppliers.
That's what I thought Bob. Draw rollers look like that and have to be adjustable. The ones I worked on were slightly knurled though
51 quid each they are 78 quid normaly
I recon I could pay for a lathe buy making a few of these.
[Edited on 16-2-05 by mangogrooveworkshop]
fits on shafts and costs a shed load of money cryptic clue
[Edited on 16-2-05 by mangogrooveworkshop]
Does it need to be in two parts for fitting?
How about casting; does anyone cast metal anymore, or only for vintage cars?
Cheers
KT
Yup, looks like it came off the slitting shaft of a folder.
Originally posted by bob
Looks like one of our rollers off a print finishing machine,if so yes they are a fortune to buy from machine suppliers.
erm... if cutting/drilling etc before turning, I'd suggest putting a .2mm shim-plate between the two parts: you want to KNOW that it's going
to be clamped tight.
I'd want to know if those rounds are entirely nessecarry: would chamfers do?
In the interests of cheapness though, (I'm assuming it's a drive-shaft mass)... I'd turn it first, (do the drilling before I part it
off)(pocket it with a milling tool before drilling and tapping)... Then part it off, and then split it with a 1mm disk.
With regards to positioning the halves while bolting it up... use two 1mm shim-plates.
But I'd only be able to do it in stainless or 7005. It's all i have readlily available.
quote:
Originally posted by Wadders
Yup, looks like it came off the slitting shaft of a folder.
Originally posted by bob
Looks like one of our rollers off a print finishing machine,if so yes they are a fortune to buy from machine suppliers.
Not for a few years Bob, but yes iv'e spent many a stressful hour fiddling with an unwilling MBO.
Sounds like we are in the same trade
Looks like what we called shaft collars at the last place I worked,used to hold things in place on shafts(one either side)such as carrier plates
etc.Also come in one piece(slit thru one side)
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