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23rd March 2015, 10:44 AM #31Member
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Yes complete with chamfer - I cannot find the radius of the cutter edge anywhere - however what I'll do later is used your pic and scale the insert to the correct size and work out the radius off it.
The sizes of the blades were easy enough to find in the Hammer/Felder shop:
http://au.feldershop.com/en-AU/en-AU...er-knives.html
They are some expensive inserts!!! (then again they are cheaper than Carbatec!)
So I guess if I was stocking them and selling them at AU$3.80 ea rather than AU$9.20 ea (!) people might be interested!?!?
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23rd March 2015 10:44 AM # ADSGoogle Adsense Advertisement
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23rd March 2015, 11:21 AM #32
Ah yup, I guess you'd be right!
I'm still only on the first edge of my set (4 edges) but they are due to be rotated pretty soon.
Do your cutters have 2 or 4 edges? I seem to recall reading it was 2.
I may be able to get a more accurate fix on the height of the arc with a feeler gauge.
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23rd March 2015, 11:31 AM #33Member
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- Brisbane
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These would have 4 cutter edges, the 2 edge ones are for the spiral cutters (not the helix!)
Well the common radius are 100mm, 115mm and 150mm - so if you have a compass handy or even print a few curves on CAD you cut easy place a cutter against the line and see what it has.
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23rd March 2015, 11:46 AM #34
4 is good then!
I can be quite accurate about the radius with the following formula (once I get a fix on the height of the arc:
radius = ½h +w²/h/8
where h is the height of the arc and w is the width
so, if the height is 0.25mm and the width is 13.45 then
r = 0.125 + 13.45*13.45/0.25/8
= 0.125 + 90.45
= 90.575 (it will pretty obviously fall into one of the radii that you mentioned, so the arc height will be different - that's just an eyeball)
In a little while I'll dig out the feeler gauge and then also compare the calculation to a compass drawn arc.
Check back in around 12.30 ESDT.
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23rd March 2015, 12:27 PM #35
Hmmm. Not sure I can get an accurate fix with either a feeler gauge or the compass arcs.
There is just too much margin for error trying to butt the cutter up against a straight edge and then measuring the gap because it can be lopsided and so on.
I drew 4 arcs: 90, 100, 115 & 150mm radius.
The cutter matches both 115 & 150mm arcs: in other words I couldn't be certain because again the margin for error is too big (or small or something). It is definitely not a match for 100mm or less.
However, what I can say with certainty is that for a 150mm match, the height of the arc would be 0.15mm or 6 thou (which makes a radius of 150.8mm). For a 115mm radius it would be an arc height of 0.197mm or a shade under 8 thou.
I suppose that because I couldn't discern a difference between 115 and 150mm arcs that would surely mean that it wouldn't matter much if it was either.
If you like I can post a new one to you (cost of a stamp only, so no big deal). I have a box of 10 spares.
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23rd March 2015, 12:33 PM #36Member
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24th March 2015, 09:25 PM #37GOLD MEMBER
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If you put a spare cutter on a flat bed scanner and post a high res image, we could reverse engineer the radius. The flat bed sander has much less parallax error than a camera.
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26th March 2015, 10:54 PM #38Member
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- Aug 2008
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- Brisbane
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K01 inserts for Spiral Cutter heads - Back in stock!
Although half have already been purchased on back order!!
New order placed - this time the Byrd Shelix cutter inserts have made it on to this order.
The Felder/Hammer Silent Cutter Inserts will be on the next order . . . on that note FenceFurniture do you have a flat bed scanner you could scan one of the blade at hi res then I can easily confirm if it is a R150 (that's what the factory thinks but it would probably be best if I could confirm it)
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27th March 2015, 08:04 AM #39
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27th March 2015, 06:16 PM #40Member
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Alrighty the scan did the trick - I printed a 13.8 square with a R150 edge and a scale print of the insert and put them over each other on a light surface and they line up perfectly.
So there is one thing final thing I need to check given these are pretty unique inserts - and that is the angle of the cutting edge (so a bit easier to check than the edge radius!) - the Byrd cutters are usually 30 degrees are these the same?
I can then add them to the next order - I'll have to wait till the new follow up order has been fulfilled before ordering them.
Cheers
Steve
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27th March 2015, 06:29 PM #41
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27th March 2015, 06:54 PM #42Member
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15th April 2015, 08:53 AM #43Member
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15th April 2015, 08:44 PM #44Member
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Someone can sense the arrival of carbide!!!
They sure have - arrived today they did!
I will be making them available on the website shortly - I've been some what over run with requests for the guitar fretboard radiusing router bits of late - along Facebook . . . I said I'd never have a Facebook account and I guess I have as I put it in my websites name! So if I ain't updating here (and I still intend to sponsor - just haven't had time to do the gif) then you can always drop me a message on Facebook (www.facebook.com/sje-tools)
Also coming on here has reminded me I need to order some of the Hammer/Felder inserts - as my new order is already being compiled!
Cheers
Steve
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16th April 2015, 12:38 AM #45Member
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- Brisbane
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Byrd/Shelix cutterhead inserts are go - now available to order: http://www.sje-tools.com/collections...arbide-inserts
Byrd/Shelix cutterhead owners no longer need to have the price envy of the US!
Cheers
Steve
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