1 Flute UP CUT Carbide End Mill (for Plastics)

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1/8-1/8-SP-1F-17 [B2]
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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
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 3.175mm x 6mm x 17mm  1F 9,350 4,700
6-6-SP-1F-22 4mm x 6mm x 17mm  1F 7,500 3,750
6-6-SP-1F-32 6mm x 6mm x 17mm  1F 4,800 2,400
6-6-SP-1F-52 6mm x 6mm x 22mm  1F 1,950 1,000
3.175-6.35-SP-1F-17 6mm x 6mm x 32mm  1F 2,450 1,250
4-6.35-SP-1F-22 6mm x 6mm x 52mm  1F 3,000 1,500
6.35-6.35-SP-1F-22 3.175mm x 6.35mm x 17mm  1F 8,650 4,350
8-8-SP-1F-22 4mm x 6.35mm x 22mm  1F 16,550 8,300
10-10-SP-1F-22 6.35mm x 6.35mm x 22mm  1F 34,300 17,150
12-12-SP-1F-32 8mm x 8mm x 22mm  1F 43,650 21,850
Revolutions per minute 16,000RPM    
100% width per cut slotting    
Depth per cut Diameter x 1    

49 Reviews Hide Reviews Show Reviews

  • 5
    Single flute upcut

    Posted by Thomas Siegmeth on 1st Nov 2023

    Very happy with the purchase they work perfectly nice cuts definitely buy them again. Regards Thomas

  • 5
    6*6*52 1f UC

    Posted by Brenton on 25th Sep 2023

    So I got 2 of these cutters in order to profile cut 40mm Acrylic sheet. I am still using the first. The machine has a Z axis mostly made of licorice so am unable to push this cutter like I would normally on my other milling machines. It is running 10K rpm @ 1300mm/min and has cut over 650 LM to date and the cut on my index finger tells me it is still sharp. With 50mm hanging bellow the collet and making full depth finishing and spring passes the cutter leaves a finish better than I expected Good tool; Highly recommended

  • 5
    Great End Mill

    Posted by Paul Thompson on 12th Sep 2023

    These End Mills are great value!

  • 5
    6mmx6mm 1F upcut for plastics

    Posted by Jasmin Pojskic on 4th Aug 2023

    I’ve used this bit to cut corian with some default feeds and speeds (taken from another bit vendor) and it cuts like hot knife through butter. Strongly recommend.

  • 5
    6mm Cutter

    Posted by Ryan South East Plastics on 2nd Aug 2023

    We use these cutters a lot to cut plastics and they perform great!

  • 5
    1f ucut bit in

    Posted by Unknown on 20th Jul 2023

    great for acrylic even in climb milling

  • 5
    Up Cut Flute nails Acrylic

    Posted by Malcolm George on 18th Jul 2023

    Great Bit, did what I had hoped and more.

  • 5

    Posted by Dave Horan on 30th Jun 2023

    great finish on polycarbonate excellent service and fast delivery as always from Adam

  • 5
    CNC bits

    Posted by Mervyn Mitchell on 19th Jun 2023

    The bits are super sharp. Cut cleanly and arrived in record time. Thanks