What Is a Magnesia Stabilized Zirconia Ceramic Pin?
A magnesia stabilized zirconia ceramic pin is a locating pin made from Mg-PSZ (magnesia-partially-stabilized zirconia), a dense, ivory-colored technical ceramic. In a fixture it performs the locating or guiding function of a metal dowel while adding the properties of zirconia ceramic: high hardness and wear resistance, good fracture toughness,
Dimensions of Magnesia Stabilized Zirconia Ceramic Pin
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Mg-PSZ Ceramic Pin |
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Item No. |
Diameter（mm) |
Height (mm) |
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AT-MGO-X001 |
Customize |
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Technical Specifications of Magnesia Stabilized Zirconia Ceramic Pin
Use the grade data to screen contact, mechanical, thermal and electrical requirements. Finished-pin fit and acceptance follow the approved drawing and assembly conditions.
| Material property |
AD-ZRO-MG reference |
Basis |
| Density |
5.70–5.80 g/cm³ |
Typical material value |
| Flexural strength |
500–755 MPa |
Typical material value at 20°C |
| Compressive strength |
2100 MPa |
Typical material value at 20°C |
| Fracture toughness KIC |
6–12 MPa·m⁰·⁵ |
Typical material value at 20°C |
| Vickers hardness |
11.5 GPa |
Typical material value |
| Young's modulus |
200 GPa |
Typical material value at 20°C |
| Linear thermal expansion |
10.5 × 10⁻⁶/K |
Material data over 40–80°C |
| Thermal conductivity |
2.5 W/(m·K) |
Typical material value at 20°C |
| Volume resistivity |
>10¹⁴ Ω·cm at 20°C; 10⁸–10¹⁰ Ω·cm at 300°C |
Material data; 300°C range is typical |
How to Choose the Locating Pin
Match the pin geometry to its role in the fixture:
- Repeated insertion or sliding contact: Check the locating diameter, entry geometry, mating surface and edge condition. Monitor wear on the surfaces that control position.
- Axial seating or retained mounting: Define the shoulder contact, datum axis, retention method and assembly force path.
- Thermal-process fixtures: Compare pin and seat expansion across the actual temperature cycle, then check the fit after cycling.
- Electrical isolation: Assess both bulk and surface insulation paths at the operating temperature and expected cleanliness.
- Replacement parts: Match the existing geometry and mounting interface, and agree trial-fit acceptance criteria.
Select the material and geometry together. Confirm the grade, dimensions and inspection scope before production.
Material Comparison for Locating Pins
Mg-PSZ vs. Alumina
Mg-PSZ offers higher fracture toughness and flexural strength, helping it withstand impact and edge loading during locating and guiding. Alumina is a lower-cost option where loads are light and wear is the main concern.
Mg-PSZ vs. Hardened Steel
Mg-PSZ provides electrical insulation, non-magnetic behavior and a ceramic contact surface that avoids metal-to-metal galling. Steel remains easier to press-fit and thread. Review the mounting method and operating conditions before replacing a steel dowel.
Mg-PSZ vs. Fine-Grained Y-TZP
Mg-PSZ has a coarser, partially stabilized microstructure and is considered for toughness and thermal stability. Compare it with fine-grained Y-TZP against the required surface finish, impact loads, thermal cycling and locating duty.
Failure Modes to Design Against
1. Edge and Shoulder Chipping
- Common causes: Hammering, unguided press-fitting or side loading at a chamfer.
- Prevention: Guide the pin during installation and apply controlled force through a suitable support face.
2. Overload and Over-Constraint
- Common causes: An oversized pin, excessive interference or a two-pin layout that creates conflicting locating constraints.
- Prevention: Review pin-to-bore fit, alignment and locating clearances before assembly. Pay particular attention to shoulder roots and the smallest sections.
3. Unverified Thermal or Electrical Limits
- Thermal: No maximum service temperature is published for this grade here. Establish the working limit using the actual load, atmosphere, hold time and thermal cycles.
- Electrical: Material volume resistivity does not establish the finished pin’s working voltage. Define acceptance tests for the actual assembly and operating conditions.
Packaging for Magnesia Stabilized Zirconia Ceramic Pin
Specify protection for the locating surface, tip, shoulder and edges. Agree separation, cleanliness, identification and transport protection with the order so the functional features remain protected during handling.
Where a Magnesia Stabilized Zirconia Ceramic Pin Is Used
A Mg-PSZ ceramic locating pin is chosen where a steel dowel causes a problem: galling or seizing, current conduction, magnetic interference, corrosion in a process medium, or loss of location at temperature. Four fixture contexts cover most enquiries, and each sets a different decision before trial.
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Locating Pins in Welding and Robotic Fixtures
The pin locates or guides a workpiece through repeated insertion near arc energy and spatter. A ceramic surface does not gall or cold-weld to steel workpieces the way a steel dowel can, which keeps the locating contact stable between cleaning intervals. Decide the lead-in shape, the locating contact and how the installed pin is shielded from direct arc and spatter, and keep it clear of impact and over-constraint.
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Thermal-Process Fixtures
Furnace, sintering and brazing fixtures move from room temperature to process temperature and back. Decide pin and seat expansion across the actual cycle, the support and clearance, and check the fit after cycling. Review expansion over the full design temperature range rather than relying on a single reference point.
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Electrical-Isolation Assemblies
Some fixtures need a locating feature that also breaks an electrical path. Decide the assembled test with the actual electrodes, working temperature, surface cleanliness and acceptance criterion, and confirm how the pin, seat and surface condition together meet the isolation goal.
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Replacement and Maintenance Work
When a steel dowel wears, corrodes, conducts current or loses location, match the old-part geometry and mounting interface and agree a trial fit against the actual assembly. Review why the steel part failed first, so the replacement addresses the cause rather than only the symptom.
Agree the duty, drawing revision and acceptance test for your fixture before trial.
How to Install, Store and Maintain a MSZ Ceramic Pin
Handling and integration decide how long a ceramic locating pin holds its position. The actions below are written as points to confirm for the actual pin and fixture, not as a fixed schedule; agree the intervals, cleaning method and acceptance limits with your own assembly procedure.
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Installation Guidelines for Precision Fitment
1. Check alignment: Align the pin, mating bore and fixture to prevent lateral loading.
2. Trial-fit first: Confirm alignment with a dry fit before applying assembly force.
3. Avoid impact: Do not hammer or use uncontrolled press-fitting. Impact can initiate micro-cracks at chamfers and shoulder roots, especially in thin or stepped sections.
4. Apply controlled pressure: Use guided pressure and a soft pusher block against the designated support face.
5. Verify tolerances: Check bore or slot dimensions before insertion. Misalignment or an incorrect fit can concentrate stress and shorten service life.
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Storage and Environmental Control
1. Keep pins separated: Store unpacked parts in clean, closed, padded containers.
2. Control exposure: Keep parts away from moisture, contaminants and direct sunlight. Review storage conditions where salt vapors or process residues are present.
3. Protect finished surfaces: Avoid contact with oily tools and aggressive solvents. Confirm that cleaning products leave no harmful residue.
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Maintenance and Inspection
1. Inspect critical areas: Check locating surfaces, edges and shoulders for wear, debris, chips and cracks.
2. Use suitable inspection methods: Select lighting and magnification appropriate to the agreed acceptance limits.
3. Clean carefully: Use a soft brush and a cleaning method approved for the pin, mating materials and surface requirements. Avoid abrasive cloths or unverified ultrasonic cleaning.
4. Track actual use: Record service hours or insertion cycles to establish inspection and replacement intervals based on fixture duty.
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Conditions That Cause Common Failures
1. Unverified operating temperatures: No maximum service temperature is quoted for this grade. Review the assembly’s working limit against load, atmosphere, hold time and thermal cycling.
2. Direct arc or spatter exposure: Keep the pin clear of direct arc energy and spatter unless suitably shielded. Exposure can cause surface pitting and cracking.
3. Rotation after interference fitting: Do not rotate or torque a locked pin. This can initiate hidden cracks near shoulder transitions.
4. Uncontrolled removal or adjustment: Follow the approved mounting procedure whenever the pin needs repositioning or replacement.
