Single Edge Milling Cutter 5A-Down Cut For PC Lenses Acrylic Panels Nameplates

One cutter covers PC lenses, PMMA panels, MR200 and MR58 optical lenses, mobile phone glass, acrylic panels and electrical nameplates. The CUT008 is a single-edge 5A down-cut milling cutter: the edge shears downward, so chips leave below the work and the machined face stays flat and burr-free. Stocked in 13 sizes, cutting diameter 1.0–8.0 mm, cutting length 4–25 mm, shank 3.175 / 4 / 6 / 8 mm, overall length 38–60 mm, alloy body. Every cutter is individually packed, and price is quoted per size code.

Anyone trimming PC lenses, acrylic panels or electrical nameplates on a CNC router meets the same three failures. The top face lifts into a burr and has to be scraped by hand. Chips ride up the edge and land back on the finished surface. And a tool that behaves at 1.0 mm chatters once the job moves to thicker acrylic.

It is a single-edge 5A down-cut milling cutter in alloy. One cutting edge, shearing downward instead of lifting the material. The chip is driven below the workpiece, so the upper surface keeps the level it had before machining — which is what holds a PC lens, a PMMA window or a printed nameplate flat and free of edge chipping.

The range runs from 1 × 4 × 3.175 × 38 — a 1.0 mm cutter on a 3.175 mm shank — up to 8 × 25 × 8 × 60, an 8.0 mm cutter on an 8 mm shank. 13 sizes sit between them, with cutting lengths of 4, 8, 12, 17, 22 and 25 mm and overall lengths of 38, 45, 50 and 60 mm.

Shanks are 3.175 / 4 / 6 / 8 mm, the four collets already on routers, engraving machines and milling spindles. Every cutter is individually packed, so the edge travels without touching other tooling.

Nine things that decide whether a trim pass leaves a clean face or a burr:

• Down-cut geometry — the cutting edge shears downward, so chips are directed below the workpiece and the upper face stays flat instead of lifting.
• One cutting edge — a single edge per tool, ground to the diameter in the size code, from 1.0 mm to 8.0 mm.
• 13 stocked sizes — cutting diameters 1.0, 2.0, 3.175, 3.2, 4.0, 6.0 and 8.0 mm across cutting lengths of 4 – 25 mm.
• Four shank diameters — 3.175 mm (the 1/8 in collet), 4 mm, 6 mm, and 8 mm on the largest 8 × 25 × 8 × 60 size.
• Four overall lengths — 38, 45, 50 and 60 mm, paired to cutting length so a 25 mm edge still clears the collet.
• Alloy body — shank and flutes in one alloy piece, ground to the finished cutting diameter listed for that size.
• Optical and display materials — PC lenses, PMMA panels, MR200 and MR58 optical lenses, mobile phone glass, acrylic panels and electrical nameplates on the same tool.
• Flat, burr-free top surface — the chip leaves downward, so the face you see after machining needs no second scraping pass.
• Individually packed — one cutter per pack, so the edge is protected in transit and sizes stay separated in the tool drawer.

The usual choice is between sending the trimming out and scraping the burr off by hand afterwards. Neither one is free.

• One tool family instead of a drawer of one-offs. 13 sizes from 1.0 mm to 8.0 mm share one geometry, so a job that moves from a mobile phone glass window to an electrical nameplate does not need a second supplier or a rewritten program.
• Less rework on the visible face. The down-cut edge leaves the top surface flat, which takes the scraping step out of every PMMA or acrylic panel that a standard up-cut trim puts back in.
• Fewer scrapped lenses. Edge chipping at 1.0 mm or 2.0 mm is where a PC lens or an MR200 lens turns into waste — the down-cut shear keeps that cut line clean.
• Fits the spindle you already run. Shanks of 3.175, 4, 6 and 8 mm cover the standard router and engraving-machine collets, so the cutter goes straight in with no adapter.
• Reordering is one line. Each cutter is individually packed and every size carries a D × H × d × L code, so a repeat order is one code — 4 × 22 × 4 × 45 — not a description.

Yes. The 5A down-cut edge shears downward, so the chip is driven below the workpiece and the upper surface does not lift into a burr. That is the point of the geometry: the face you see after machining is the face you started with, which is why it is specified for acrylic panels and printed electrical nameplates.

No. Both are listed for this tool, together with PMMA panels, MR200 and MR58 optical lenses, mobile phone glass and acrylic panels. What changes is the size: you pick the cutting diameter and cutting length for the feature, not the material.

It means material is removed on the downward side of the rotation. Chips are directed below the workpiece instead of being thrown up onto the finished surface, which is what prevents material lifting and edge chipping on soft optical plastics.

Match the collet, then the diameter. 3.175 mm is the 1/8 in collet; 4 mm, 6 mm and 8 mm are the metric ones. The shank is fixed by size, so confirm the spindle first: the 8 mm shank only comes on 8 × 25 × 8 × 60.

Thirteen. The smallest is 1 × 4 × 3.175 × 38 — 1.0 mm diameter, 4 mm cutting length, 3.175 mm shank, 38 mm overall. The largest is 8 × 25 × 8 × 60, an 8.0 mm cutter with a 25 mm cutting length on an 8 mm shank.

The cutting length sets the limit. The range tops out at 25 mm of edge — 4 × 25 × 4 × 50, 6 × 25 × 6 × 50 and 8 × 25 × 8 × 60 — and the shortest edge is 4 mm on 1 × 4 × 3.175 × 38. Anything deeper than the cutting length has to be taken in steps.

Alloy. The flutes and the shank are alloy, and each size is ground to the cutting diameter in its code — from 1.0 mm on the smallest to 8.0 mm on 8 × 25 × 8 × 60.

Send the size code and we quote against it. Price is on request rather than a list, because the range runs across 13 sizes from 1 × 4 × 3.175 × 38 to 8 × 25 × 8 × 60, and the code tells us the diameter, cutting length, shank and overall length in one line.