There is only really one bit that you would want to attempt on plastics and that is the 1 flute up cut. Also know and single or “O” flute, the one toothed up cutter allows for maximum chip ejection compared to any other bit and generates the least amount of heat. The combination of the two means that when cutting plastics, you avoid the nasty occurrence of “chip rewelding” where plastic upon cutting heats up to the point it solidifies behind the cutter, rather than ejecting nicely. As these bits are purposely aggressive, using these bits on laminated woods like ply or softwoods would tear up your material and leave a heavily burred finished.

Suitable for

Plastics (ABS, acrylic, HPDE etc)
Wood (MDF, hardwood)

Adam’s Tips

To reduce rewelding, ensure your bit doesn’t heat up by driving your feed rate high and router RPM low.

Feeds and Speeds - 1 Flute for Plastics mm per minute
		Plastics/Wood
Item Code	Description	Soft	Hard
0.8-3.175-SP-1F-3	0.8mm x 3.175mm x 3mm 1F	650	350
1-3.175-SP-1F-4	1mm x 3.175mm x 4mm 1F	800	400
1.5-1/8-SP-1F-6	1.5mm x 3.175mm x 6mm 1F	1,250	650
2-1/8-SP-1F-8	2mm x 3.175mm x 8mm 1F	1,700	850
2-1/8-SP-1F-12	2mm x 3.175mm x 12mm 1F	1,450	750
2.5-1/8-SP-1F-12	2.5mm x 3.175mm x 12mm 1F	2,050	1,050
1/8-1/8-SP-1F-12	3.175mm x 3.175mm x 12mm 1F	3,050	1,550
1/8-1/8-SP-1F-17	3.175mm x 3.175mm x 17mm 1F	2,450	1,250
1/8-1/8-SP-1F-22	3.175mm x 3.175mm x 22mm 1F	1,950	1,000
4-4-SP-1F-17	4mm x 4mm x 17mm 1F	3,800	1,900
4-4-SP-1F-22	4mm x 4mm x 22mm 1F	3,000	1,500
6-6-SP-1F-17	6mm x 6mm x 17mm 1F	9,350	4,700
6-6-SP-1F-22	6mm x 6mm x 22mm 1F	7,500	3,750
6-6-SP-1F-32	6mm x 6mm x 32mm 1F	4,800	2,400
6-6-SP-1F-52	6mm x 6mm x 52mm 1F	1,950	1,000
3.175-6.35-SP-1F-17	3.175mm x 6.35mm x 17mm 1F	2,450	1,250
4-6.35-SP-1F-22	4mm x 6.35mm x 22mm 1F	3,000	1,500
6.35-6.35-SP-1F-22	6.35mm x 6.35mm x 22mm 1F	8,650	4,350
8-8-SP-1F-22	8mm x 8mm x 22mm 1F	16,550	8,300
10-10-SP-1F-22	10mm x 10mm x 22mm 1F	34,300	17,150
12-12-SP-1F-32	12mm x 12mm x 32mm 1F	43,650	21,850

Revolutions per minute 16,000RPM
100% width per cut slotting
Depth per cut Diameter x 1

69 Reviews Hide Reviews Show Reviews

5
Single flute upcut for plastics

Posted by Steve Scurr on 11th Jun 2025

Did the job as described, impressed
5
Polypropylene Cutting

Posted by Jeremy on 22nd May 2025

Perfect for quick efficient cutting of Poly material up to 15mm thick.
5
Very happy with products and service

Posted by Mike Barnett on 7th Apr 2025

I am a repeat customer of Adam's and will continue to be so. The bits are great value and Adam is very generouse when I buy in quantity.
5
1 Flute UP CUT Carbide End Mill (for Plastics)

Posted by Dave Elson on 1st Apr 2025

Very clean cuts, no issue with overheating or melting, good chipload
5
1F Upcut

Posted by Justin Jones on 11th Feb 2025

Makes for clean and easy work cutting and shaping plastic.
5
1F uncut bits

Posted by Brad on 9th Jan 2025

Absolutely fantastic bits. They arrive very quickly and are great quality. A real bargain.
5
Cutting HDPE like a dream

Posted by Christo Candiotes on 25th Nov 2024

Bought this but to try and mill HDPE on a DIY CNC. Performs well above my expectations. The flat surfaces may need cleaning up but the finish on side walls is brilliant. Very happy. I have yet to dial in the best spindle speed and feed rate so I believe it will only get better.
5
Excellent

Posted by James Dutton on 6th Aug 2024

Excellent
5
1 FLUTE UP CUT CARBIDE END MILL (FOR PLASTICS

Posted by Greg on 19th Jul 2024

Very impressed. Adam’s Bits are now our go to supplier.