Small aluminium top clamps that slide into a 3018's T-slots and press a blank down with a hand knob, no wrench needed between jobs.
The Genmitsu T-track mini hold-down is a top clamp. A slot block drops into the bed's T-slot, an arm reaches over the edge of the stock, and a hand knob pulls the arm down until the blank cannot move.
Top pressure is what a thick blank wants. A 40 mm pine block for a relief carving or a deep pocket takes a lot of sideways load as the bit plunges and steps over, and a clamp pushing it into the bed resists that load through friction across the whole underside. The 2-pack clamp opens to 1.77 inches, which is 45 mm of stock.
A setup that holds on the first try:
Knob tightening is the practical part. Swapping stock between jobs takes seconds and no wrench, and the aluminium body will not gouge the bed.
The first cuts on a 3018 nearly all start with a blank held this way.
| Spec | Value |
|---|---|
| Brand | Genmitsu |
| Clamp style | T-track mini hold-down, presses the stock from above |
| Tightening | Hand knob |
| 2-pack model | 101-63-MCP |
| 2-pack material | 6061 aluminium alloy |
| 2-pack size (each) | 65.3 × 20 × 50 mm (2.57 × 0.79 × 1.97 in) |
| 2-pack stock capacity | Up to 1.77 in (45 mm) thick |
| 4-pack model | CP50 |
| 4-pack material | Zinc-aluminium alloy |
| 4-pack size (each) | 50 × 20 × 56 mm |
| 4-pack stock capacity | Up to 30 mm thick |
| 4-pack weight | 0.2 kg |
| Mounting | Slot block sized for Genmitsu 3018 T-slots |
| Machines named | Genmitsu 3018-PRO, 3018-PROVer, 3018-MX3 |
| Other uses | Routers, drill presses, table saws, jigs, vertical mills |
| Colour | Silver |
The 2-pack and the 4-pack share a name and a job, but they are not the same clamp. Genmitsu builds them from different alloys to different sizes, and they open to different heights.
| 2-pack (101-63-MCP) | 4-pack (CP50) | |
|---|---|---|
| Material | 6061 aluminium | Zinc-aluminium alloy |
| Size | 65.3 × 20 × 50 mm | 50 × 20 × 56 mm |
| Stock capacity | Up to 45 mm | Up to 30 mm |
| Clamps | 2 | 4 |
The 2-pack has the longer reach and opens further. It suits thick hardwood blanks, tall aluminium bar and anything close to the 45 mm Z travel of a 3018-PRO.
Zinc alloys are far denser than aluminium, so the 6061 body weighs less for its size. Its longer arm also spreads the knob's pressure over more of the blank, which helps on heavy roughing passes in aluminium bar.
The 4-pack trades capacity for count. Four shorter clamps hold a thin panel at every corner, which matters more on plywood and acrylic sheet than raw opening height.
Genmitsu sizes the slot block for its own 3018 series, and the 4-pack text says it fits other 3018 T-slot beds as well. Slot widths vary between makers, so measure the slot on a non-Genmitsu frame before relying on that.
Machines these clamps were drawn for include the Genmitsu 3018-PRO and the 3018-PROVer V2.
A hold-down presses down on a small patch of stock, and that patch is off-limits to the bit. Each material handles that pressure differently, and each asks for its own placement.
Clearance is the part that catches people. The 2-pack body stands 50 mm tall and the 4-pack 56 mm, both taller than a typical blank, so the collet nut and spindle must travel over them or around them.
Both Candle and UGS let you jog the spindle to each clamp before the run and confirm the clearance by eye; the 3018 software rundown covers where those jog controls sit.
Four other workholding sets fight for the same T-slots. The right one depends on stock thickness, the bed and whether the top face has to stay clear.
| Clamp | Style | Size | Capacity or note |
|---|---|---|---|
| Genmitsu 2-pack | Top, knob | 65.3 × 20 × 50 mm | Stock to 45 mm, 6061 |
| LUNYEE mini hold-down | Top, knob | 65 × 20 × 62 mm | Stock to 45 mm, 6063, padded jaws |
| Fuzqq low-profile | Side, screw | About 54 × 22 × 19 mm | Top face stays free, 4 clamps |
| CEKPDGRT kit | Top, M6 bolt | Varies | 3D-printed PETG, made for the PROVer V2 |
The LUNYEE mini is the closest rival: nearly the same footprint, the same 45 mm capacity, and protective covers on the jaw. It is 12 mm taller, which costs clearance on a 45 mm Z machine.
Side clamps suit facing and engraving, where any arm over the stock is in the way. The PETG kit will not scratch a workpiece and bolts down with M6 hardware anywhere on a slotted bed.
Mixing styles is common on a 3018. Hold-downs grip the blank while the roughing passes clear material, then side clamps take over for a finishing or engraving pass across the full face, once the hold-downs are removed.
Before ordering, measure your T-slot width, note the tallest stock you cut and check how high your Z rises above the bed.
No. The 2-pack is a 6061 aluminium clamp for stock up to 45 mm; the 4-pack is a smaller zinc-aluminium clamp for stock up to 30 mm.
They fit beds with a T-slot the slot block can enter. Measure your slot width first, since it varies between makers.
No. Both packs tighten with a hand knob.
Yes, if the clearance height is set only above the stock. The clamps stand 50–56 mm tall, so set clearance above them or route around them.
