1/64" Down Cut
Inventables 1/64” downcut bit. An orange plastic band marks it, matching Inventables’ fine-detail engraving line, though the exact SKU in that lineup wasn’t confirmable. Shank diameter (1/8”) and flute count (2) are assumed from the pattern of every other small Inventables bit in the shop, not independently confirmed on this one.
Specifications
| Property | Value |
|---|---|
| Cutting diameter | 0.0155” (measured; ~1/64” nominal) |
| Shank diameter | 0.125” (assumed, unconfirmed) |
| Flutes | 2 (assumed, unconfirmed) |
| Cutting length | 0.250” |
| Overall length | 1.500” |
| Geometry | Down cut spiral |
| Corner radius | None — square end |
| Material | Solid carbide |
| Coating | None |
Feeds & Speeds
For the X-Carve Pro and its 1.5 kW spindle. Scaled down further from D07’s already first-principles numbers — this bit’s cross-sectional area is roughly a quarter of D07’s, so feed backs off another 30-40% and stepdown drops to single-digit thousandths. RPM stays flat across wood tiers for the same reason as D07: breakage risk, not spindle torque, is what limits this bit.
| Material | RPM | Feed | Chipload | Plunge | Stepdown |
|---|---|---|---|---|---|
| Hard maple / oak | 18,000 | 9 ipm | 0.00025” | 4 ipm | 0.008” |
| Soft maple / walnut / cherry | 18,000 | 10 ipm | 0.00028” | 4 ipm | 0.008” |
| Plywood / veneered sheet | 18,000 | 11 ipm | 0.00031” | 4 ipm | 0.008” |
| MDF / laminate | 18,000 | 12 ipm | 0.00033” | 4 ipm | 0.01” |
| Softwood / pine | 18,000 | 12 ipm | 0.00033” | 4 ipm | 0.01” |
| Acrylic / HDPE | 14,000 | 9 ipm | 0.00032” | 4 ipm | 0.006” |
Notes
Maximum cut depth is 0.25” — a little more than D07’s 0.2”, despite the smaller diameter. Flute length and cutting diameter don’t scale together on these detail bits.
More fragile than D07 — a smaller diameter than an already-fragile bit. Constant chip clearance, dead-slow feeds, and a toolpath that never dwells or reverses under load.
Unconfirmed shank and flute count. Every other small Inventables bit in the shop (D07, B03) uses a 1/8” shank and 2 flutes, and this one is assumed to match.
Always ramp — never plunge, same as every downcut here, doubly true at this scale.
Links
- Database: Tooling
- CAM library: Fusion hub library, Human Crafted (T21)