Drill Speed For Countersinking Into Phenolic Sheet
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Drill Speed For Countersinking Into Phenolic Sheet
Hi all,
I've got some 3mm thick phenolic sheet to make a zero clearance insert for my tablesaw.
I'm using a single flute countersinking bit. My floor standing drill press is 550 watts and has the following speeds.
190,290,310,420,470,490,610,680,740, 765. I think is correct to use a low speed so not mentioned higher speeds, the top one is 3645.
The Ebay listing description of the phenolic sheet is, TUFNOL 1P/13 Sheet Phenolic SRBP Plastic Plate Paper laminate 1P13 electrical
Is a brown colour. What would be the best speed to use?
I also bought a sleeveless sanding drum 50mm x 75mm fitted with 120g abrasive paper.To fit on the drill to round over the corners of the phenolic sheet. Sanding drum says max 1500rpm, as you guys know a lot, what speed should I run the sanding drum to get the best finish on the phenolic corners?
OK thank you.
Peter.
I've got some 3mm thick phenolic sheet to make a zero clearance insert for my tablesaw.
I'm using a single flute countersinking bit. My floor standing drill press is 550 watts and has the following speeds.
190,290,310,420,470,490,610,680,740, 765. I think is correct to use a low speed so not mentioned higher speeds, the top one is 3645.
The Ebay listing description of the phenolic sheet is, TUFNOL 1P/13 Sheet Phenolic SRBP Plastic Plate Paper laminate 1P13 electrical
Is a brown colour. What would be the best speed to use?
I also bought a sleeveless sanding drum 50mm x 75mm fitted with 120g abrasive paper.To fit on the drill to round over the corners of the phenolic sheet. Sanding drum says max 1500rpm, as you guys know a lot, what speed should I run the sanding drum to get the best finish on the phenolic corners?
OK thank you.
Peter.
- SteveHGraham
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Re: Drill Speed For Countersinking Into Phenolic Sheet
I can't tell if you're drilling holes, but if you are, hold the work down. Plastic likes to climb up drill bits. It also likes to catch and spin.
Every hard-fried egg began life sunny-side up.
- warmstrong1955
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Re: Drill Speed For Countersinking Into Phenolic Sheet
I've worked with nylons, UHMW's, teflon etc, but not that stuff. Speeds must me slow to ovoid overheating.
I'd give 'em a call: http://www.tufnol.com/materials-full/pa ... -size.aspx
As far as Steve's concern of the drill bit grabbing & climbing when you drill, that can be cured with a little drill bit 'rackectomy' on the grinder.
I've not had that problem with any of the plastics I've worked with when countersinking or counterboring.
Sorry....not much help.
Bill
I'd give 'em a call: http://www.tufnol.com/materials-full/pa ... -size.aspx
As far as Steve's concern of the drill bit grabbing & climbing when you drill, that can be cured with a little drill bit 'rackectomy' on the grinder.
I've not had that problem with any of the plastics I've worked with when countersinking or counterboring.
Sorry....not much help.
Bill
Today's solutions are tomorrow's problems.
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Re: Drill Speed For Countersinking Into Phenolic Sheet
OK thanks.SteveHGraham wrote:I can't tell if you're drilling holes, but if you are, hold the work down. Plastic likes to climb up drill bits. It also likes to catch and spin.
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- Joined: Mon Jun 25, 2012 12:13 pm
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Re: Drill Speed For Countersinking Into Phenolic Sheet
I didn't realize I could call them in the UK, where I am.warmstrong1955 wrote:I've worked with nylons, UHMW's, teflon etc, but not that stuff. Speeds must me slow to ovoid overheating.
I'd give 'em a call: http://www.tufnol.com/materials-full/pa ... -size.aspx
As far as Steve's concern of the drill bit grabbing & climbing when you drill, that can be cured with a little drill bit 'rackectomy' on the grinder.
I've not had that problem with any of the plastics I've worked with when countersinking or counterboring.
Sorry....not much help.
Bill
Will give them a call Thursday morning.
Cheers.
Re: Drill Speed For Countersinking Into Phenolic Sheet
Run the drum at low RPM, enough to get a bite. Tufnol acts more like wood than plastic and will burn at higher speeds. Assuming the work is clamped, a drill won't grab for the size you're using.pollys1dad wrote:
I also bought a sleeveless sanding drum 50mm x 75mm fitted with 120g abrasive paper.To fit on the drill to round over the corners of the phenolic sheet. Sanding drum says max 1500rpm, as you guys know a lot, what speed should I run the sanding drum to get the best finish on the phenolic corners?
A single flute c'sink will give better results.
A respirator or good draught recommended. (I think that's how you spell "draft")
Re: Drill Speed For Countersinking Into Phenolic Sheet
Depends. It's a "regional" thing.Carm wrote: (I think that's how you spell "draft")
Here in he US, draft is a breeze, or to draw (a line, for example).
Draught is to do with pouring a fluid, like a draught beer, also pronounced draft.
I think (I'm not sure I'm right) that the Brits use the draught spelling for all situations.
Harold
Wise people talk because they have something to say. Fools talk because they have to say something.
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Re: Drill Speed For Countersinking Into Phenolic Sheet
I just did one 5/16 Flat head and 2, 10-32 flat head c-sinks today in linen filled phenolic on the mill
today. I used a multi flute csink to have more cutting edges in contact at a time. I just left the
spindle at the same speed I had been using to drill and mill the edges 1150 rpm and fed the
cutter in small increments with a lift/pause after half sec. or so contact. Had to have the heads flush
or slightly recessed.
...lew...
today. I used a multi flute csink to have more cutting edges in contact at a time. I just left the
spindle at the same speed I had been using to drill and mill the edges 1150 rpm and fed the
cutter in small increments with a lift/pause after half sec. or so contact. Had to have the heads flush
or slightly recessed.
...lew...
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Re: Drill Speed For Countersinking Into Phenolic Sheet
OK thanks everyone for your input.
Peter.
Peter.
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Re: Drill Speed For Countersinking Into Phenolic Sheet
Here you go, English as she is meant to be spoke -Harold_V wrote:Depends. It's a "regional" thing.Carm wrote: (I think that's how you spell "draft")
Here in he US, draft is a breeze, or to draw (a line, for example).
Draught is to do with pouring a fluid, like a draught beer, also pronounced draft.
I think (I'm not sure I'm right) that the Brits use the draught spelling for all situations.
Harold
http://www.oxforddictionaries.com/defin ... lish/draft
- Nick
- SteveHGraham
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Re: Drill Speed For Countersinking Into Phenolic Sheet
Table saw inserts typically have finger holes maybe 7/8" in diameter. You better believe a drill bit that big will grab, and a hole that big will definitely provide enough grip to make the work ride up the bit.Carm wrote: Run the drum at low RPM, enough to get a bite. Tufnol acts more like wood than plastic and will burn at higher speeds. Assuming the work is clamped, a drill won't grab for the size you're using.
I managed to punch myself in the face with a drill handle this week. Grabbed in mahogany. I feel good about my decision to never film anything I do with tools.
Every hard-fried egg began life sunny-side up.
- tornitore45
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- Joined: Tue Apr 18, 2006 12:24 am
- Location: USA Texas, Austin
Re: Drill Speed For Countersinking Into Phenolic Sheet
When drilling Printed Circuit Board in Phenolic or Fiberglass at very high RPM the bit heats up, but high RPM is necessary with small bits to reach the proper cutting speed in FTM.
I saw the manufacture use a thin aluminum sheet under the piece and drill into it to cool the bit.
Whether this techniques applies to what you are doing, I can't say.
I saw the manufacture use a thin aluminum sheet under the piece and drill into it to cool the bit.
Whether this techniques applies to what you are doing, I can't say.
Mauro Gaetano
in Austin TX
in Austin TX