White Zirconia Ceramic Stepped Ring Bushings | Custom ZrO2 Shoulder Spacer Washers

Precision Zirconia Stepped Ring Bushings
Haorui machined these white zirconia (3Y-TZP) stepped ring spacers for a European precision-machinery customer. The two-step shoulder design acts as a built-in flange, so one part replaces a washer + spacer stack — no metal contact, no galling, no electrical leakage.
Features
• One-piece stepped profile: OD shoulder, reduced pilot OD, chamfered bore
• Dimension tolerance ±0.01 mm; bore/spindle fit H7-grade on request
• Fully insulating and non-magnetic — ideal near sensors and coils
• Polished working faces, Ra ≤0.2 µm to minimise fretting wear
Applications: rotary sensor spacers, pump bushings, insulating collars in testing fixtures, food & medical equipment (biocompatible, non-contaminating).
MOQ from 10 pcs. Send us a sketch with OD/ID/height — quotation within 24 h.

Material:	3Y-TZP White Zirconia
Color:	Ivory white
Brand:	HaoRui - Chinese manufacturer & exporter
Availability:	Made to order, samples available
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Model:
02A02
Brand:
HaoRui
Code:
02A02

Product Description

Key Features

Precision CNC grinding - diameter, shoulder step and face flatness held to +/-0.01 mm
Electrically insulating, non-magnetic and 100% rust-free
Hardness 1200 HV - the running face outlasts hardened steel many times over
Chemically inert, suitable for acids, solvents and cleanroom service
Available in 3Y-TZP white zirconia; matching black and blue grades on request

Typical Applications

Pump and valve spacer rings
Electrical insulation washers
Precision locating / shoulder bushes
Semiconductor and analytical instrument assemblies
Sealing and gap-setting rings

Material & Specifications

Property	Item	3Y-TZP White / Black	Mg-PSZ Gold yellow	Nano 3Y-TZP Blue
Mechanical	Colour	Ivory / Black	Gold yellow	Nano blue
	Density	6.02 g/cm3	5.7 g/cm3	6.01 g/cm3
	Bending strength	800 MPa	450 MPa	1200 MPa
	Compressive strength	3000 MPa	2500 MPa	3000 MPa
	Elastic modulus	200 GPa	250 GPa	220 GPa
	Fracture toughness	8 MPa m1/2	6-7 MPa m1/2	14 MPa m1/2
	Weibull coefficient	15 m	12 m	25 m
	Vickers hardness	1200 HV0.5	1100 HV0.5	1200 HV0.5
Thermal	Coeff. of linear thermal expansion	10 x10-6/K	10 x10-6/K	10 x10-6/K
	Thermal conductivity	3 W/mK	3 W/mK	2 W/mK
	Thermal shock resistance	300 dT degC	450 dT degC	300 dT degC
	Max working temperature	1000 degC	2100 degC	1000 degC
Electrical	Volume resistance at 20degC	>10^13 Ohm cm	>10^14 Ohm cm	>10^13 Ohm cm

Standard properties of the zirconia grades we machine. Tolerances, surface finish and part-specific dimensions are made to your drawing.

Customization & Ordering

Send a drawing (STEP / DXF / PDF) or a sample - we quote from either.
Material: white 3Y-TZP, anti-static black 3Y-TZP, nano-tough blue 3Y-TZP or yellow Mg-PSZ.
Tolerance: +/-0.01 mm typical, down to +/-0.005 mm on critical dimensions.
Finishing: as-machined, diamond-ground, lapped or mirror-polished.
Prototype and small batch orders accepted; production quantities supplied with inspection report on request.