Flow Control Discs for Niche Zero

A set of four flow control discs for the Niche Zero, laser cut from 3 mm black acrylic. Each disc goes in place of the stock flow disc, and the notch in its edge sets how fast the beans enter the burrs. Disc 1 is the fastest, disc 4 the slowest; a slower feed gives a more even grind.

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Four feed speeds for the Niche Zero

This Niche Zero flow control disc set holds four discs that go in place of the grinder's stock flow disc. The opening in the edge of the disc, a notch, sets how fast the beans reach the burrs. A slower feed gives a more even grind.

The four discs differ only in the notch. All four measure Ø40.4 × 3 mm, with a Ø6.2 mm centre hole.

From fast to slow

Disc 1 is the fastest and disc 4 the slowest. The width of the notch changes the flow most, its depth less. Disc 2 has only a little less open area than disc 1, yet it is much slower, because its notch is narrower. Estimated feed times for 15 g of beans:

Disc 1: notch 10 × 10 mm, about 26 s
Disc 2: notch 9 × 10 mm, about 50 s
Disc 3: notch 9 × 9.5 mm, about 1 min 10 s
Disc 4: notch 9 × 9 mm, about 2 min 20 s

All four times are estimates. They vary with the size of the beans and the roast.

How to use it

Open the lid of the grinder.
Undo the original bolt that holds the stock disc on the burr hub, and take the stock disc out.
Place the disc you chose on the burr hub, numbered side up.
Refit the original bolt. Nothing else on the grinder changes.
Grind as usual. The disc turns with the burr, and the beans pass through the notch.

These steps are for information only. We give no installation support and no guarantee for the fitting.

Materials and care

The discs are laser cut from 3 mm opaque black acrylic, with a glossy face and a hazy black cut edge. The number (1 to 4) and the Black Tamp logo are lightly laser engraved and show as a grey, frosted mark. Wipe the discs with a dry cloth.

What's in the box

4 × flow control disc, numbered 1 to 4

The grinder and its bolt are not included.

Design credit

Opening geometry after benno1337 (GPL-2.0), from his "Niche Zero custom flow control discs" on Printables.

Specifications

Sizes and fit

Fits: Niche Zero, in place of the stock flow disc

Build

Material: Opaque black acrylic, laser cut, number and logo laser engraved

Extras

Position: On the burr hub under the original bolt
Set: 4 discs, 1 (fastest) to 4 (slowest)
Disc 1: Notch 10 × 10 mm, throat 10.08 mm, inner width 10.72 mm, open area 95.3 mm², about 26 s per 15 g (estimated)
Disc 2: Notch 9 × 10 mm, throat 9.13 mm, inner width 10.54 mm, open area 91.4 mm², about 50 s per 15 g (estimated)
Disc 3: Notch 9 × 9.5 mm, throat 9.16 mm, inner width 10.52 mm, open area 86.5 mm², about 1 min 10 s per 15 g (estimated)
Disc 4: Notch 9 × 9 mm, throat 9.17 mm, inner width 10.52 mm, open area 81.7 mm², about 2 min 20 s per 15 g (estimated)
Notch: Width × depth; the throat is the narrowest point near the edge, the inner width the widest point inside
Feed times: Estimated, vary with bean size and roast
Disc: Ø40.4 × 3 mm
Centre hole: Ø6.2 mm
Care: Wipe with a dry cloth
Brand: Black Tamp