Top 3018s
Genmitsu 3018 Dust Shoe (42mm)
Dust shoe · 42 mm spindles · magnetic, clear ABS

Genmitsu 3018 Dust Shoe (42mm)

A clear, three-part magnetic shroud that bolts around a 42 mm spindle, sweeps the cut with a 40 mm nylon brush and hands the chips to a shop vacuum through a 38 mm port.

  • Spindle size42 mm (1.65 in) diameter
  • Brush40 mm nylon, planted
  • Vacuum port32 mm inside, 38 mm outside
  • BuildClear ABS, magnetic sections
  • Mounting2 × M4 screws on the spindle holder
Suits
  • 3018-PRO and PROVer owners with the stock 775 spindle
  • MDF and plywood cutting, where fine dust fills the room
  • Watching the bit through a clear shroud
  • Quick bit changes without taking the shoe off
Skip if
  • 52 mm, 65 mm or 69 mm spindles and 300–500W motors
  • Machines with no vacuum or extractor to connect
  • Very short bits unless the brush is trimmed or the 20 mm cover is used
Get it here
Kit contents

One brush or a spare 20 mm cover

Dust shoe with 40 mm brush
See this kit
+ spare bottom cover, 20 mm brush
See this kit

MDF dust off the bench with a 42 mm 775 shoe

MDF is the most useful sheet on a 3018 and the messiest. A 1/8 in bit turns it into fine powder that coats the rails, drifts into the leadscrews and hangs in the air. The Genmitsu dust shoe wraps the 775 spindle, closes the gap to the stock with a 40 mm nylon brush and feeds everything into a vacuum hose before it spreads.

The design points that matter:

  • Clear ABS. The bit stays visible through the shroud, so the cut can still be watched.
  • Three magnetic sections. A top cover screws to the spindle; the central chamber and bottom cover hang from it on magnets.
  • A planted brush. The 40 mm nylon bristles are set into the cover rather than glued, so they stay put as they wear.
  • A standard port. 32 mm inside, 38 mm outside, which matches common 1.5 in shop-vacuum hoses and adapters.

It fits spindles 42 mm (1.65 in) across with two 4 mm screw holes. That covers the 775 motor on the Genmitsu 3018-PRO, the PROVer family, the 3018-MX3, the 1810-PRO and the 4040-PRO, plus generic 3018-PRO machines that use the same motor.

Clean rails last longer. MDF dust mixed with the grease on smooth rods and leadscrews becomes a paste that wears nuts and bushings. Pulling the dust away at the bit is the cheapest way to keep the motion system clean.

Plywood and softwood throw chips as well as dust. The brush keeps those inside the shroud, where the vacuum collects them, instead of scattering them across the spoilboard and over the clamps. A clear bed between passes also makes it easier to spot a part lifting or a clamp working loose.

Measurements

The spec log

SpecValue
Part numberDS3018
Spindle diameter42 mm (1.65 in), with two 4 mm screw holes
Compatible spindles775 motors, including Genmitsu GS-775M and GS-775MR
Compatible machines3018-PRO, 3018-PROVer, 3018-PROVer V2, PROVer Mach3, 3018-MX3, 1810-PRO, 4040-PRO, 4040 Reno
MaterialTransparent ABS
Brush40 mm nylon, planted rather than glued
ConstructionTop cover, central chamber and bottom cover, joined by magnets
Bit changesBottom cover pops off, no tools
Vacuum port outer diameter38 mm (1.5 in)
Vacuum port inner diameter32 mm (1.26 in)
Mounting hardware2 × M4 × 8 screws
In the boxDust shoe, 2 screws, wrench, manual
Spare partReplacement bottom cover with 20 mm brush
Package size5.91 × 5.35 × 3.39 in

Brush length against V-bits, acrylic and short end mills

The brush does its best work when its tips sit level with the tip of the bit. Too long, and it drags across the stock before the bit reaches it; too short, and suction escapes around the edges. Genmitsu's own guidance is to trim the bristles to suit the bit length, or to fit the replacement bottom cover with a 20 mm brush.

JobHow the shoe behavesAdjustment
MDF, plywood cut-outsBest case: fine dust, steady suctionNone
V-carving signsShort bit stick-out, brush may dragTrim the brush or use the 20 mm cover
Cast acrylicChips are larger and can be warmKeep the feed up so chips stay solid
Aluminium sheetChips collected, no coolant allowed near MDFDry cutting only on an MDF bed
Laser engravingNot used; the laser replaces the spindleRemove the shoe

Signs the setup needs attention:

  • Bristles bent flat after a job, meaning the brush was compressed against the stock.
  • A ring of dust left around each cut, meaning suction is escaping under a short brush.
  • The shoe touching a clamp, which lifts the brush and can knock the clamp.

Clamp height matters as much as bit length. Low-profile side clamps stay under the brush; tall top clamps catch it, so route toolpaths around them or switch to edge clamping.

A dust shoe does not replace eye protection or a mask for MDF work. It removes most of the dust at the source, and the rest still needs a well-aired room.

In the lineup

Where it lands among 3018 gear

3018 CNC machine models by type, September 2026. Highlighted: Genmitsu 3018 Dust Shoe (42mm).

Fitting three magnetic parts and a 32 mm hose

Installation takes three steps and two screws. The top cover is the only part that bolts on; everything else attaches by magnets, which is why bit changes stay quick with the shoe in place.

  1. Screw the top cover to the spindle's two 4 mm holes with the included M4 × 8 screws.
  2. Line up the magnets on the central chamber with those on the top cover and let it snap on.
  3. Line up the bottom cover's magnets with the central chamber and attach it.
  4. Push a 32 mm hose end into the port, or fit a 38 mm (1.5 in) cuff over it.
  5. Jog the Z down to the stock and check the bristle tips sit level with the bit tip.

For a bit change, pop the bottom cover off, swap the bit in the collet, and refit the cover; the job needs no tools, and the top cover never moves.

Hose routing decides whether the shoe helps or hinders:

  • Hang the hose from above, so its weight does not pull the gantry or drag on the stock.
  • Leave enough slack to reach every end of X and Y before the first job.
  • Route the hose clear of the stepper and spindle cables.
A long vacuum hose with a stiff cuff can tug on a light 3018 gantry enough to show in the cut. Check that the hose moves freely anywhere on the bed.

Where the brush wears out, replace the whole bottom cover rather than rebuilding the bristles; that is the job the spare cover in the bundle is for.

Swap-ins

Three other ways to go

For 52 mm spindles1 LUNYEE 52mm Dust Shoe
LUNYEE 52mm Dust Shoe
LUNYEE's 52 mm dust shoe fits 300–500W spindles and takes the same 38 mm hose size.
  • Keeps chips off the bench
  • 52mm
  • Fits 52mm-spindle 3018s
Get it here

One brush or two: the 20 mm cover, 52 mm shoes and a full enclosure

The dust shoe comes alone or bundled with a replacement bottom cover carrying a 20 mm brush. The two covers split the jobs: the 40 mm brush for long end mills and through-cuts, the 20 mm brush for V-bits and short engraving tools.

  • Shoe only: right if most work is cutting and pocketing with 1/8 in end mills.
  • Shoe plus 20 mm cover: right if V-carving and engraving make up a good share of the jobs, or if a spare is wanted for when the first brush wears.

The shoe is tied to the spindle, so the spindle decides which shoe to buy:

SpindleDust shoe
Stock 775 or GS-775M, 42 mmThis Genmitsu 42 mm shoe
300–500W, 52 mmA 52 mm shoe, such as the LUNYEE 52 mm
Trim router, 65 or 69 mmGenmitsu's 65/69 mm shoe

The 42 mm size also survives the most common spindle swap. Owners who replace the stock 775 with Genmitsu's 20,000 rpm GS-775M keep the same diameter, so the shoe moves across with two screws.

Upgrading to the aluminium Z assembly and a 52 mm spindle later means a new shoe as well, so factor that into the plan.

What to confirm on the machine first:

  • The spindle measures 42 mm across and has two 4 mm screw holes.
  • A shop vacuum or extractor with a hose that fits a 32 mm or 38 mm port.
  • Room above the gantry to route the hose.

For the rest of the order in which parts pay back, see 3018 upgrades; the same shoe also comes bundled with the 3018-PRO kit.

Bench notes

Setup questions

Does the Genmitsu dust shoe fit the 3018-PROVer V2?

Yes, on its 42 mm 775 spindle. It also fits the 3018-PRO, PROVer, PROVer Mach3, 3018-MX3, 1810-PRO and 4040-PRO.

Which vacuum hose suits the Genmitsu shoe?

The port measures 32 mm inside and 38 mm (1.5 in) outside, so a 32 mm hose end plugs in or a 1.5 in cuff fits over.

Does the shoe have to come off to change bits?

No. The bottom cover is magnetic and pops off by hand; the top cover stays on the spindle.

The brush drags on the stock. What fixes it?

Trim the bristles so their tips sit level with the bit tip, or fit the replacement bottom cover with the 20 mm brush.

Will it fit a 52 mm 500W spindle?

No. It is sized for 42 mm spindles; 300–500W motors need a 52 mm dust shoe.