# JLCMC End Mills for the Voron Cascade — Aluminum 6061 (ER16) **Goal:** A focused buy-list from [JLCMC's end-mill catalog](https://jlcmc.com/campaign/end-mill) for cutting **6061 aluminum** on a **Voron Cascade** (light-duty desktop CNC, 1.5 kW / 24,000 RPM ER16 spindle). Essentials first, then nice-to-haves, with links, quantities, and the reasoning behind each. --- ## TL;DR — buy this first | Priority | Tool | Size | Qty | ~From price* | |---|---|---|---|---| | **Essential** | 3-flute flat, aluminum (LXDA) | **6 mm** | **2** | $5.51 | | **Essential** | 3-flute flat, aluminum (LXDA) | **3 mm** | **2–3** | $5.51 | | Nice-to-have | 3-flute flat, aluminum (LXDA) | 8 mm | 1 | $5.51 | | Nice-to-have | 3-flute **Wave** rougher, aluminum (LXDD) | 6 mm | 1 | $15.64 | | Nice-to-have | 2-flute **ball nose**, aluminum (LXDC) | 6 mm (R3) | 1 | $6.39 | | Nice-to-have | 3-flute **corner-radius**, aluminum (LXDB) | 6 mm × 0.5R | 1 | $6.17 | | Nice-to-have | 3-flute flat, aluminum (LXDA) | 1.5–2 mm | 2 | $5.51 | \* Standard product-page starting prices. The campaign page currently advertises **lower promo pricing** (e.g. the 3F flat "from ~$1.17") — buy through the campaign link and confirm the price for your exact diameter, since price scales with size. --- ## The 3 rules that drive every choice below **1. Only buy the tools labeled "Aluminum Alloy."** JLCMC sells four aluminum-specific end mills, and all four are **uncoated** (surface coating = "None"). That's exactly what you want. Their other lines ("General Purpose," "Steel," "High-Hardness") are coated with **TiAlN / AlTiN / AlCrSiN** — aluminum-titanium-nitride coatings that are *great* for steel but *wrong* for aluminum: the aluminum in the coating cold-welds to the aluminum workpiece and forms a **built-up edge (BUE)** that wrecks finish and snaps tools. Don't be tempted by the cheaper steel-grade flats. **2. Low flute count wins in aluminum.** 6061 throws a big, gummy chip. You need deep flute valleys to clear it at the high RPM aluminum likes. Harvey Performance's guidance: 2–3 flutes are ideal; **4+ flutes choke on chips** at aluminum speeds. JLCMC's aluminum flats and corner-radius are **3-flute**, the ball nose is **2-flute** — all correct. The 3-flute is the modern sweet spot: nearly the chip clearance of a 2-flute, but stiffer, faster, and a better finish. **3. Match tool size to a light machine.** The Cascade is a light-duty desktop mill — capable in aluminum "with careful strategies," per Voron's own positioning. **6 mm is the workhorse sweet spot**: the biggest tool the frame can confidently push while still doing detail. Bigger tools (12 mm+) both exceed your ER16 collet and out-muscle the machine, so this list caps at 8 mm. --- ## Essential kit — builds ~90% of aluminum parts ### 6 mm 3-flute flat (LXDA) — **×2** [jlcmc.com/…/end-mill-flat-3-flutes-aluminum-alloy-processing](https://jlcmc.com/product/s/L06/LXDA/end-mill-flat-3-flutes-aluminum-alloy-processing) Your do-everything tool: roughs and finishes flats, walls, pockets, and profiles. 3-flute uncoated carbide is the textbook aluminum finisher/general-purpose geometry, and 6 mm is about the largest cutter this machine drives happily. The 6 mm shank drops straight into a common ER16 collet. **Buy two** — a worn or snapped workhorse shouldn't halt a build mid-job. ### 3 mm 3-flute flat (LXDA) — **×2–3** [Same product, 3 mm size](https://jlcmc.com/product/s/L06/LXDA/end-mill-flat-3-flutes-aluminum-alloy-processing) Your detail tool: smaller pockets, slots, and tighter internal corners (a 3 mm cutter leaves a 1.5 mm internal radius the 6 mm can't reach). Small tools are the ones you break, so **keep 2–3 on hand**. 3 mm shank = another standard ER16 collet. This size is roughly the metric equivalent of the classic 1/8" hobby end mill — see the collet note below on why you want the true **3 mm**, not 1/8". > Diameters offered for LXDA: 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, 14, 16, 20 mm. Stick to ≤ 8 mm for ER16 + machine rigidity. --- ## Nice-to-have — add as your parts demand ### 8 mm 3-flute flat (LXDA) — ×1 Faster facing and stock roughing of larger flat areas — more material per pass and a flatter surface in fewer steps. Worth it once you're surfacing bigger plates, but take **light passes**: 8 mm is near the top of what the Cascade can drive, and this spindle makes no torque at low RPM, so you can't just slow it down for a big cut. 8 mm shank still fits ER16. ### 6 mm 3-flute **Wave** rougher (LXDD) — ×1 [end-mill-wave-3-flutes-aluminum-alloy-processing](https://jlcmc.com/product/s/L06/LXDD/end-mill-wave-3-flutes-aluminum-alloy-processing) A dedicated high-material-removal rougher. The serrated "wave" flutes shear the chip into small segments, which **cuts the cutting force and chatter** — a real advantage on a lower-rigidity desktop frame, letting you take deeper/faster roughing passes. Trade-off: it leaves a scalloped surface, so it's a *rougher you pair with the 6 mm flat finisher*, not a one-tool solution. Worth it once cycle time on bigger 6061 parts starts to bug you. (Starts at 6 mm; pricier at ~$15+.) ### 6 mm 2-flute **ball nose** (LXDC, R3) — ×1 (+ optional 3 mm / R1.5) [end-mill-ball-nose-2-flutes-aluminum-alloy-processing](https://jlcmc.com/product/s/L06/LXDC/end-mill-ball-nose-2-flutes-aluminum-alloy-processing) The only way to cut true **3D contours, fillets, radiused pockets, and sculpted surfaces**. If every part you make is prismatic (flat faces, square walls) you can skip it — but the first time you machine a curved surface or a 3D relief, you'll need one. 2-flute is standard and correct for aluminum ball work. Add a 3 mm (R1.5) if you do fine 3D detail. *Ball sizes offered: Ø2–12 mm (R1–R6).* ### 6 mm 3-flute **corner-radius**, 0.5 mm radius (LXDB) — ×1 [end-mill-radius-3-flutes-aluminum-alloy-processing](https://jlcmc.com/product/s/L06/LXDB/end-mill-radius-3-flutes-aluminum-alloy-processing) A small corner radius removes the fragile sharp corner of a flat end mill, so the tool **resists edge-chipping and lasts markedly longer** — especially in heavier roughing and interrupted cuts. Bonus: it leaves a filleted floor at the bottom of pockets and walls, which is stronger (less stress concentration) and often exactly what a bracket wants. A 0.5 mm radius stays nearly square while getting most of the tool-life benefit. *Radii offered: 0.2 / 0.3 / 0.5 / 1.0 / 1.5 / 2.0 mm.* ### 1.5–2 mm 3-flute flat (LXDA) — ×2 Fine features, small text/relief, tiny internal radii. Fragile and cheap — buy multiples of whatever small size your parts actually use. Skip unless you machine fine detail. --- ## Collets — the metric gotcha (read this before ordering) An **ER16 collet clamps roughly 1–10 mm**, each collet covering about a 1 mm range, so it comfortably holds every tool above. But **JLCMC end mills are metric**, and a lot of hobby CNC collet sets are imperial. A **3 mm** tool will *not* seat properly in a **1/8" (3.175 mm)** collet — that 0.175 mm gap means poor grip and runout. Buy **true metric ER16 collets**: | Collet | For these tools | |---|---| | **ER16 3 mm** | 3 mm flats, 3 mm ball | | **ER16 6 mm** | 6 mm flat, wave, ball, corner-radius | | **ER16 8 mm** | 8 mm flat | | (ER16 1.5–2 mm) | only if you buy the 1.5–2 mm detail tools | --- ## What JLCMC's end-mill line does *not* cover (source elsewhere) JLCMC's cutting-tool catalog is these **end mills only** — no chamfer mills, spot drills, drills, or face mills. To round out an aluminum kit you'll want, from another supplier: - **A 90° chamfer / spot mill** — for breaking edges, chamfers, and accurately starting holes. Genuinely useful; JLCMC has none. (In a pinch, a ball nose can lightly break edges, but it's no substitute.) - **Carbide drills** — or just helical-interpolate ("ramp") holes with your end mills for non-critical bores. - **Face mill** — not needed on this machine; use the 8 mm flat for surfacing. A dedicated indexable face mill is too much load for a light desktop frame anyway. --- ## Starter feeds & speeds — 6061, uncoated 3F, light desktop mill **Conservative starting points — begin at ~70–80% of these and tune up.** All assume **climb milling**, air blast or mist for chip clearance, and a touch of lubricity (mist coolant, IPA, or WD-40) to stop aluminum welding to the flutes. Feed = RPM × flutes × chipload. | Tool | RPM (start) | Chipload / tooth | Feed (mm/min) | Axial DOC | Radial (WOC) | |---|---|---|---|---|---| | 3 mm 3F flat | 24,000 | 0.012 mm | ~850 | adaptive up to 1×D (3 mm); slot 0.2–0.3 mm | adaptive 10–15% D; slot full | | **6 mm 3F flat** | **18,000** | **0.020 mm** | **~1,080** | adaptive 1–1.5×D (6–9 mm); slot 0.3–0.5 mm | adaptive 10–20% D; slot full | | 8 mm 3F flat | 15,000 | 0.030 mm | ~1,350 | light 0.3–0.5 mm facing passes | 10–20% D | | 1.5–2 mm 3F flat | 24,000 | 0.006–0.008 mm | ~350–550 | 0.1–0.3 mm | light | | 6 mm 2F ball | 20,000 | 0.020 mm | ~800 | per 3D model | finish stepover 0.1–0.2 mm | | 6 mm 3F Wave rougher | 18,000 | 0.035 mm | ~1,300–1,900 | deep — that's its job | moderate–high | **Golden rules for aluminum on the Cascade** - **Keep RPM high.** This spindle "loses all torque at low speeds," so favor high-RPM/light-cut strategies over big slow cuts. - **Use adaptive / trochoidal (HSM) toolpaths.** Low radial engagement + deep axial depth lets a light machine cut deep without loading the frame — the single biggest win for aluminum on a desktop CNC. Bump feed to compensate for chip thinning at low stepover. - **Never let chips recut.** In aluminum, recut chips destroy finish and tools fast — blow them clear. - **If it chatters, reduce depth-of-cut, not RPM.** If chips look like dust, increase feed. - **Climb mill** for finish and tool life. --- ## Consolidated shopping list **Essential (~$28 + shipping at product-page prices; less on the campaign promo)** - 6 mm 3F flat aluminum (LXDA) — **×2** — [link](https://jlcmc.com/product/s/L06/LXDA/end-mill-flat-3-flutes-aluminum-alloy-processing) - 3 mm 3F flat aluminum (LXDA) — **×2–3** — [link](https://jlcmc.com/product/s/L06/LXDA/end-mill-flat-3-flutes-aluminum-alloy-processing) - ER16 metric collets: 3 mm + 6 mm (source to fit your spindle nut) **Nice-to-have (add over time)** - 8 mm 3F flat aluminum (LXDA) — ×1 — [link](https://jlcmc.com/product/s/L06/LXDA/end-mill-flat-3-flutes-aluminum-alloy-processing) - 6 mm 3F Wave rougher aluminum (LXDD) — ×1 — [link](https://jlcmc.com/product/s/L06/LXDD/end-mill-wave-3-flutes-aluminum-alloy-processing) - 6 mm 2F ball nose aluminum (LXDC) — ×1 — [link](https://jlcmc.com/product/s/L06/LXDC/end-mill-ball-nose-2-flutes-aluminum-alloy-processing) - 6 mm 3F corner-radius 0.5R aluminum (LXDB) — ×1 — [link](https://jlcmc.com/product/s/L06/LXDB/end-mill-radius-3-flutes-aluminum-alloy-processing) - 1.5–2 mm 3F flat aluminum (LXDA) — ×2 — [link](https://jlcmc.com/product/s/L06/LXDA/end-mill-flat-3-flutes-aluminum-alloy-processing) - ER16 metric collet: 8 mm (for the 8 mm flat) **Elsewhere:** 90° chamfer/spot mill, carbide drills. --- ### Sources - JLCMC end-mill campaign & catalog: [campaign page](https://jlcmc.com/campaign/end-mill) · [full category](https://jlcmc.com/product/L06/end-mill) - Product pages: [LXDA flat 3F Al](https://jlcmc.com/product/s/L06/LXDA/end-mill-flat-3-flutes-aluminum-alloy-processing) · [LXDB corner-radius 3F Al](https://jlcmc.com/product/s/L06/LXDB/end-mill-radius-3-flutes-aluminum-alloy-processing) · [LXDC ball nose 2F Al](https://jlcmc.com/product/s/L06/LXDC/end-mill-ball-nose-2-flutes-aluminum-alloy-processing) · [LXDD Wave rougher 3F Al](https://jlcmc.com/product/s/L06/LXDD/end-mill-wave-3-flutes-aluminum-alloy-processing) - Aluminum machining principles (flute count, coatings, chip evacuation): [Harvey Performance — Attacking Aluminum](https://www.harveyperformance.com/in-the-loupe/aluminum-machining-guide/) - Voron Cascade capability class & spindle: [Voron Design](https://vorondesign.com/voron_cascade) · [Hackster writeup](https://www.hackster.io/news/voron-just-released-their-cascade-diy-cnc-mill-design-6b12148ccf9e) *Prices and available sizes verified from JLCMC product pages on 2026-07-21; confirm live pricing and exact shank diameter on each filtered part number before ordering collets.*