Inlay Bushings
Mating bushings for inlay core pins. Precision bore housing and alignment for the replaceable tip insert.
Products in This Category
JIS Standard SKD61/SKH51 Steel Straight Core Pins | OEM Available
Straight Core Pins in SKD61/SKH51 Steel with Core Pin. Engineered for plastic injection molding with custom options. Con
JIS Standard SKD61/SKH51 Steel Straight Core Pins | OEM Available
Straight Core Pins in SKD61/SKH51 Steel with Core Pin. Engineered for plastic injection molding with custom options. Con
How to Specify Inlay Bushings
Inlay bushings must mate precisely with the inlay core pin and the mold plate bore. Three dimensions are critical:
| Variant | Description | Best For | Recommendation |
|---|---|---|---|
| Inner Diameter (ID) | Must match the inlay core pin body OD with clearance fit | Pin-to-bushing alignment and insert retention | H7 tolerance (sliding fit) |
| Outer Diameter (OD) | Must match the mold plate bore ID with interference fit | Bushing retention in plate, prevents bore enlargement | k6 tolerance (press fit) |
| Overall Length | Equal to plate thickness at installation point | Flush seating against plate face | ±0.02 mm |
About Inlay Bushings
Inlay bushings and inlay core pins are a matched system. The bushing provides the bore housing that accepts both the pin body and the replaceable tip insert, ensuring each new insert sits in exactly the same position as its predecessor.
Bushing-to-bore concentricity is critical — any misalignment between the bushing and the mold plate bore compounds through the system, potentially causing uneven wear on the insert and the molded feature.
The bushing also serves as a wear interface. It absorbs the mechanical stress from repeated pin insertion and extraction, protecting the significantly more expensive mold plate bore from enlargement over time. When the bushing wears, it is pressed out and replaced — a far less expensive operation than re-machining or sleeving the plate bore.
Application Scenarios
See how this product type solves real engineering challenges across different industries and applications:
Inlay Pin Support & Alignment
Pain point: Inlay core pins require precise bore guidance in the mold plate — standard bushings may not provide the tight clearance needed for the inlay pin's shank diameter.
Why it fits: Inlay bushings are precision-matched to inlay pin shank diameters, ensuring minimal radial play. This maintains concentricity between the replaceable tip and the mold cavity.
Thermal Expansion Management
Pain point: At elevated mold temperatures (100-180°C), differential thermal expansion between the pin and bushing can cause either binding or excessive clearance — both leading to part defects.
Why it fits: Material-matched bushing and pin combinations maintain consistent clearance across the operating temperature range. Precision bore tolerance accounts for thermal expansion at design temperature.
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Frequently Asked Questions
How do inlay bushings extend service life?+
Must I use the matching bushing?+
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Engineering Resources
Case Studies
Need a Custom Quote?
Send your specifications — material, dimensions, quantity — and receive a quote. MOQ: 1 piece. Custom dimensions available.