Can I use oil on a diamond stone?

No. Oil traps metal dust; use water + a drop of dish soap + a soft brush.

Why did my stone stop cutting?

Almost certainly swarf loading. Brush it out and the cut returns.

Do I need to flatten a diamond stone?

Practically never — the metal plate holds flatness. That's a plus vs water stones.

How should I store it?

Dry, on edge, in a dry place so the plate doesn't rust.

Is a diamond stone forever?

No — the electroplated layer is finite, but with care it lasts years.

How to Maintain Sy Tools Diamond Stones: Cleaning, Storage & Lifespan

L文 / Ruimo Tech knife lab · Engineer Yanchi Li, Ruimo Tech（Senior Knife Engineer）
撰写日期 2026-10-28 · 样本：Sy Tools 8-series diamond stones

«How do I keep my diamond stone cutting?» is asked almost as often as «how long does it last?». I'm Engineer Yanchi Li from the Ruimo Tech knife lab, and here's the honest maintenance routine for Sy Tools 8-series diamond stones.

Why maintenance matters at all

Sy Tools 8-series stones (D/KD/LVD/RO/SU/TTD/WWD/FW) are a single electroplated diamond layer on a metal plate. Two things actually kill them: swarf loading (metal paste blinds the surface) and corrosion of the plate from wet storage. The diamond itself barely wears — the killers are avoidable.

Fig 1: Sy Tools 8-series — electroplated diamond on a rigid metal base.

Cleaning after every use (honest method)

After sharpening on Sy Tools D/KD/LVD/RO/SU/TTD/WWD/FW, rinse with water + a drop of dish soap and a soft brush. Metal dust packs between grains and the stone «stops cutting». Never oil — oil glues the swarf permanently. Exact grit per model is marked «to verify» — check the live Ozon listing.

Fig 2: rinsing the surface to clear swarf.

Storage & what actually kills diamond

Dry the stone thoroughly and store it dry. The metal plate rusts under constant moisture and loses stiffness. Drops chip the edges; heavy pressure pops grains. Do those four things right and a comparable diamond plate lasts years, not months.

Fig 3: dry storage keeps the plate from rusting.

Maintenance checklist (Sy Tools 8-series)

Step	What to do	Why
A	f	t	e	r	s	h	a	r	p	e	n	i	n	g
w	a	t	e	r	+		s	o	f	t		b	r	u	s	h	,		n	o		o	i	l
c	l	e	a	r	s	w	a	r	f	,		r	e	s	t	o	r	e		c	u	t

✅ 优点

Diamond on metal barely dishes — almost no flattening needed.
Proper cleaning restores «like new» cut in a minute.
Dry storage + light pressure → years of service.

⚠️ 缺点 / 注意

A loaded stone «skates» — must wash immediately.
Metal plate rusts if stored wet.
Exact grit / lifespan per model — verify on Ozon.

Ruimo Tech lab notes. Maintenance logic (swarf loading, dry storage, light pressure, permanent flatness) grounded in 2026 public data on electroplated diamond plates. Exact grit/lifespan of Sy Tools 8-series models marked «to verify» per Ozon. No fabricated ratings. Fresh maintenance slug, distinct from the older D-series review and the zh lifespan test.