Bill,?
I¡¯ve gone my entire professional career without a dedicated router table. When I really need one, I set up a piece of board on some Euro saw horses, and set up a temporary production run. Otherwise I use the shaper or a hand held router.?
I do plan on making a router table one day, but it will be a bench version that I can shove out of the way. I will never dedicate floor space to said table while I have a shaper ready to go.?
Of course, what you¡¯re making is also a consideration. I have a genuine need for a router table about once every two months. If I needed one every week I¡¯d disregard my comments above.?
You¡¯ve brought up a good point we all wrestle with. Hope this helps you.?
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On 1 Jan 2021, at 8:49 am, Bill Belanger <Bill@...> wrote:
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Wondering how many of you who have a shaper, also have a router table?
I have one of both, but I'm thinking in my little shop I could use the room?
I'm just getting setup, so haven't really had the full use of the shop enough to see how badly I need both.
Thanks in advance
Bill B¨¦langer
My most used router bit is a 1/8¡± round over. Most of the time it¡¯s in the router spindle already.? It¡¯s removing almost nothing but the cut is great.?
Used a 45 bevel router bit yesterday in the router spindle (never even looked at the RPM setting on the VFD) and it¡¯s cutting diameter the way I used it was like 7/8¡±.? Just removing a small amount of stock.?
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If anyone has any experiment ideas I would be happy to run some tests at 15,000 and 23,000 to see the difference using a power feeder.? Could but a
new bit and test at the two RPM settings and 2 or 3 feed rates.
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Tip speed is most critical.? Feed speed can compensate for fast tip speed but not slow.? Number of flutes helps the cuts per inch but doesn't help when the tip speed slow other than potentially
having each flute take less cut.? My experience with the 15K limit on the Felder is that core box and cove bits give me the most problem as speed is slow and a fair amount of stock needs to be removed.? I run those bits at 23K but most others seem to work
at the 15K range.? Dave
Hi Joe,
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I did not post because I did not think I good useable info but here it is anyways.
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I choose b=100 because it has lines for the smallest cutter dia on all 4 plots. So I replotted b=100 lines from 4 diff graphs onto a single graph. Then I extrapolated for smaller spindle dia of 10mm & 20mm. Then extrapolated for cutter
dia less than 100mm. So now we have this:
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<image001.png>
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However, 4¡± (100mm) is not a realistic cutting edge for a router bit. I thought anymore extrapolation (which would move 10mm & 20mm curves in NE direction) would likely be not valid. If Felder provided more data (for smaller cutter dia)
for b=10 in their plots then it would be a more appropriate to repeat the above exercise.
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Here is the data for above graph
<image002.jpg>
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Imran
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From: [email protected]
On Behalf Of Joe Jensen
Sent: Thursday, December 31, 2020 11:13 AM
To: [email protected]
Subject: Re: [FOG] Felder High Speed Router Spindle 424-111
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Number of flutes is important too.
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would be interesting to put the data points from the 4 graphs to see if the relationship is linear. If so we can easily extrapolate if fir router use.
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My machine has generic guide that is based upon recommended feed rate between 40 & 70m/s
lower feed rate than 40m/s can result in kickback and higher than 75m/s can cause damage to tooling not to mention excessive wear if the tool continues to run w/o damage.
There is a graph in the manual that further refined this with inclusion of cutter length b
I know this does not cover router spindle. Has anyone seen a graph like above from Felder for router spindle?
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Not meant to be sarcastic¡I read all the time that 15,000 is too slow for small bits.? Is there engineering behind this?? Seems like RPM and feed rate
and chip removal are related.? Higher RPM allows for a faster feed rate. But also if the feed rate is too low relative to the RPM you get poor results.? For commercial cutters for the shaper you often get given the ideal RPM/Feed rate.?
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I have not used my router inverted in a table since getting my Felder early 2010.? The router spindle with my machine was rated for 19,000 rpm continuously,
and for up to 23,000 RPM for short use with higher bearing wear.? I¡¯ve tried small bits at 15,000, 19,000, and 23,000 RPM and not noticed any difference.
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Could be that single speed routers all ran at a nominal 22,000-23,000 with no load and bigger bits were a problem with vibration.? So then when router
bits west big they made variable speed routers to slow them down for big bits and maybe that¡¯s where ¡°you need 22,000 RPM to run small bits¡± wisdom arose?
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Also, ever notice how with a very light cut at 22K RPM with pitch is high and as soon as you load the router down the pitch lowers a lot? What RPM
is the motor actually running at under load?? With my 4kw shaper motor my 15K RPM spindle doesn¡¯t slow at all.? I would not be surprised at all to see that under load routers slow down a lot.
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So, does anyone have science or engineering on the Intrawebs wisdom that says 15,000 RPM is too slow?
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From: [email protected] <[email protected]>
On Behalf Of Eric Janson
Sent: Sunday, December 27, 2020 1:51 PM
To: [email protected]
Subject: Re: [FOG] Felder High Speed Router Spindle 424-111
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This spindle works at 15,000 rpm, so for smaller- diameter router bits the cutting edge speed is kind of low. For larger bits and deeper cuts, it works great, having many HP behind it, and is as close to totally?vibration- free as you
are going to get. Changing spindles is not difficult, but changing back and forth is a pain, so my cast- iron router table is my go- to for that sort of work unless I feel I really need what the Felder spindle brings.
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On Sun, Dec 27, 2020 at 7:05 AM imranindiana via <imranindiana=[email protected]> wrote:
Just sharing. I have no knowledge of this part.
Look at this on eBay
Imran
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David Luckensmeyer