EPOC CRAFTER

EPOC CRAFTER Engineering-driven prototyping & low-volume manufacturing partner. CNC machining, injection molding, vacuum casting, sheet metal & finishing.

From concept to production.

05/05/2026

How a knurled disc gets a clean edge on the lathe, it's the order, not the tool

The most common way a knurled part comes out wrong has nothing to do with the knurl itself. It's the chamfer next to it.
Knurling rolls the metal sideways. The roller pushes into the OD, the surface flows, and a small lip rises at each end of the band. Watch the finished part at the end of the video: knurl band on the OD, clean chamfered shoulder on each side.
If the chamfer pass runs before the knurl, the roller pushes material into the chamfer corner. Edge looks fuzzy. OD over the chamfer drifts off. The fix is usually scrap.

Knurl first, clean up the chamfers and the face after, the last cutting pass takes off the lip the knurl raised. That is where the edge comes from.
Coolant on hard the whole time. Knurling is no chips, plenty of heat, and the rolled surface smears if it runs dry on softer materials.

What's the worst knurled part you've ever had to scrap, and which step did it get?

Deburring a Thin Edge With a Full 5 Axis MoveThis screenshot shows the ugly part of cleanup work. Not roughing. Not big ...
04/05/2026

Deburring a Thin Edge With a Full 5 Axis Move

This screenshot shows the ugly part of cleanup work. Not roughing. Not big stock removal. Just trying to clean a thin outside edge without letting tool reach turn into chatter or a bad witness line.

The program is calling A-90 with G68.2, G53.1, and G43.4, so this move is leaning on the machine’s rotary side from the start. The edge is long, the wall is light, and the tool is hanging out there more than I’d like. That is the part I’d watch before worrying about cycle time.

A path like this looks smooth in CAM. The real question is whether you trust that much reach on a part this thin.

Machining a Tight Rib on an Angled FaceThis screenshot shows where 5 axis gets touchy fast. Small rib, angled wall, not ...
01/05/2026

Machining a Tight Rib on an Angled Face

This screenshot shows where 5 axis gets touchy fast. Small rib, angled wall, not much room around the holder. The program is calling A-54.057 and C90 with G68.2, G53.1, and G43.4 before the move starts, so this cut is riding on rotary accuracy and tool center point control from the start.

On an op like this, I check holder clearance before feed, stepdown, or finish strategy. The rib is narrow, the face is tilted, and the top edge is close. That is the kind of move that looks safe in CAM and still gets your attention at the machine.

May 1–3: Off for Labor DayBack to full operation on May 4Enjoy the break 👍
30/04/2026

May 1–3: Off for Labor Day
Back to full operation on May 4

Enjoy the break 👍

Angled Face Machining, 5 Axis Move or Another Setup?This screenshot shows the part, the tool approach, and the code all ...
30/04/2026

Angled Face Machining, 5 Axis Move or Another Setup?

This screenshot shows the part, the tool approach, and the code all in one place. The cutter is lined up normal to that small angled pad, and the program is calling G68.2, G53.1, and G43.4 before the cut starts. That tells you this op is leaning on the machine kinematics, not just the CAM picture.

On a job like this, the first things I watch are rotary position, pivot length, and the first clearance move. The cut area is small, so there is not much room for a setup miss. One bad offset and the tool is no longer where the screen says it is.

29/04/2026

CNC Aluminum Machining Face Milling With Full Coolant Flood
Large face mill cleaning the top side of an aluminum part under heavy coolant. You can see the cutter buried in the spray while chips wash off the fixture and table.

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Three Piece Housing Assembly: Which Part Should Control the StackThis housing set tells the story better in the assembly...
29/04/2026

Three Piece Housing Assembly: Which Part Should Control the Stack

This housing set tells the story better in the assembly views than in the outside shape alone.
Bottom housing carries the base and footprint.
Middle housing holds most of the inner ribs, screw bosses, and support structure.
Top housing closes the shell and controls the visible window frame and outer fit.

That makes the real question pretty practical: which part should drive the stack?

I’d lock the middle housing first. It has more of the internal geometry, more chances for rib shift, and more ways to throw off screw alignment and edge fit. Get that one wrong and the top frame gap starts moving, the bottom support line drifts, and assembly pressure shows up fast.

On a build like this, the outside surface looks easy. The inside tells you where the trouble will start.

28/04/2026

CNC Plastic Machining Deep Cavity Milling With Air Blast

Large tool cutting a deep cavity in white engineering plastic while air keeps the pocket clear. This kind of cut looks fine until chips start rolling back into the wall.

Casting Cap Drawing: Are the Section Views Enough to Machine This Right?This part looks simple in the outside views. The...
28/04/2026

Casting Cap Drawing: Are the Section Views Enough to Machine This Right?

This part looks simple in the outside views. The real story is in B-B and C-C. You need those cuts to read the inner dome, the boss heights, the seating lip, and the stepped diameters at 42.75, 48.84, and 53.7. That R10 underside radius matters too. Without the sections, the shop is guessing where the internal shape starts and where the sealing face stops.

Machined Housing Drawing: Would You Hold the Bore and Front Face in One Setup?This housing looks straightforward until y...
27/04/2026

Machined Housing Drawing: Would You Hold the Bore and Front Face in One Setup?

This housing looks straightforward until you read the section. The stepped bore, 3.7 mm fl**ge, Ø29.9 and Ø22 diameters, and that R5 inner pocket all stack into one area. I’d hold the bore and front face together first. Miss that relationship and the mounting side starts lying to you.

27/04/2026

CNC Plastic Machining Deep Pocket Milling in White Engineering Plastic

Deep pocket milling on a white engineering plastic part, with heavy chip evacuation and a long reach end mill running inside a narrow cavity. This cut shows why plastic machining is not just about speed. Tool stickout, chip packing, wall deflection, and heat all show up fast when the pocket gets deep.

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