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Steel Pin Gate Bushings

SKH51 (M2) high-speed steel pin-point gate bushings with round or angle gate transitions. Available with head or headless, selectable or configurable tip lengths, and optional acute angle geometry.

Products — 11 Variants

SKH51 Steel Pin-Point Gate Bushings with Head - Round Gate Transition (SR)

SKH51 Steel Pin-Point Gate Bushings with Head - Round Gat...

SKH51 steel Pin-Point Gate Bushings with Head with round gate transition (SR) for smooth pin-point gating. Durable, a...

View DetailsSKH51 Steel Pin-Point Gate Bushings with Head

SKH51 Steel Pin-Point Gate Bushings with Head

Pin-Point Gate Bushings with Head (SKH51 steel) feature a tapered tip for angle gate transition molding. Built for st...

View DetailsJIS Standard SKH51 Steel Pin-Point Gate Bushings (PGHTBL) with Head

JIS Standard SKH51 Steel Pin-Point Gate Bushings (PGHTBL)...

Pin-Point Gate Bushings with Head (PGHTBL) for round gate transitions (SKH51 steel). Pilot tip hole supports precise ...

View DetailsSKH51 Steel Pin-Point Gate Bushings with Head - Round Gate Transition

SKH51 Steel Pin-Point Gate Bushings with Head - Round Gat...

SKH51 Steel Pin-Point Gate Bushings with Head feature a round gate transition for smooth transfer into the cavity. Bu...

View DetailsSKH51 Steel Pin-Point Gate Bushings Round Gate Transition SR

SKH51 Steel Pin-Point Gate Bushings Round Gate Transition SR

SKH51 Steel Pin-Point Gate Bushings with Round Gate Transition and SR tip step for precise pinpoint gating. Built for...

View DetailsJIS Standard SKH51 Steel Pin-Point Gate Bushings Round Gate Transition SR

JIS Standard SKH51 Steel Pin-Point Gate Bushings Round Ga...

Pin-Point Gate Bushings Round Gate Transition SR (SKH51 steel) support stable melt flow into molds. Tight P tolerance...

View DetailsSKH51 Steel Pin-Point Gate Bushings Angle Gate Transition

SKH51 Steel Pin-Point Gate Bushings Angle Gate Transition

SKH51 steel Pin-Point Gate Bushings with angle gate transition and tapered tip help control runner gate formation. Bu...

View DetailsSKH51 Steel Pin-Point Gate Bushings - Round Gate Transition

SKH51 Steel Pin-Point Gate Bushings - Round Gate Transition

SKH51 Steel Pin-Point Gate Bushings with round gate transition support accurate pin-point gating. Tight ±0.01 P toler...

View DetailsSKH51 Steel Round Gate Transition Pin-Point Gate Bushings (SR)

SKH51 Steel Round Gate Transition Pin-Point Gate Bushings...

Pin-Point Gate Bushings (SR) with Round Gate Transition are made from SKH51 steel, using controlled tip geometry for ...

View DetailsSKH51 Steel Pin-Point Gate Bushings Tapered Tip

SKH51 Steel Pin-Point Gate Bushings Tapered Tip

SKH51 Steel Pin-Point Gate Bushings with a tapered tip for precise angle gate transition. Tight P tolerance ±0.01 sup...

View DetailsSKH51 Steel Pin-Point Gate Bushings Round Gate Transition

SKH51 Steel Pin-Point Gate Bushings Round Gate Transition

SKH51 Steel Pin-Point Gate Bushings with round gate transition for precise injection gate alignment. Quenched hardeni...

View Details

Compare Steel Pin Gate Bushing Variants

11 variants differ by head type, gate transition geometry, tip specification method, and special features. Use this matrix to narrow your selection:

FeatureRound Gate (With Head)Angle Gate (With Head)Round Gate (Headless)Angle Gate (Headless)
Gate TransitionSmooth SR radius — uniform flowTapered angle — directional flowSmooth SR radius — uniform flowTapered angle — directional flow
Head TypeFlanged head — axial retentionFlanged head — axial retentionPress-fit — flush surfacePress-fit — flush surface
Tip Length OptionsSelectable or configurableSelectableSelectable or configurableSelectable or configurable
Pilot Tip HoleAvailable (PGHTBL type)Not availableNot availableNot available
Acute Angle OptionNot availableNot availableAvailableAvailable
Small DiameterAvailable (P ≤ 1.2 mm)Not availableAvailable (small shank)Not available
P Tolerance±0.01 mm±0.01 mm±0.01 mm±0.01 mm
Best ForStandard 3-plate molds, most common choiceGates at non-perpendicular angles to cavityCompact molds, flush runner plateCompact molds with angled gating
Recommendation: Start with headed round gate (most common). Switch to angle gate only when part geometry requires non-perpendicular gate approach. Use headless when runner plate surface must remain flat.

Selection rule: Gate transition geometry (round vs angle) has the biggest impact on part quality. For a detailed comparison of gate mark quality, see our Round vs. Angle Gate Transition guide.

Step-by-Step Selection Guide

Follow these steps to eliminate options and arrive at the correct variant:

1
Do you need the bushing to be retained axially by a flange?
Yes → With Head (headed) — Flange sits on the runner plate surface. Easier to install and remove. Most common choice.
No → Headless — Press-fit into bore. Use when runner plate surface must remain flat or space is limited around the gate location.
2
Does your gate approach the cavity perpendicularly?
Yes (perpendicular) → Round gate transition — Creates smooth, uniform flow into the cavity. Smallest vestige.
No (angled approach) → Angle gate transition — Directs resin at a specific angle. Required when part geometry prevents perpendicular gate access.
3
Does your plate stack match standard tip length increments?
Yes → Selectable tip length — Choose from pre-set lengths (faster delivery).
No → Configurable tip length — Specify exact C dimension to match your mold. Add a pin gate extension bushing if total length exceeds max.
4
Any special requirements?
Pilot hole needed → PGHTBL type (headed, round, configurable with pilot tip hole)
Ultra-small gate mark → Small tip diameter type (P ≤ 1.2 mm) — headed round only
Steep gate angle → Acute angle option — headless round or angle, configurable
Custom tip diameter → Configurable tip length + diameter type (headless round only)

Specification tip: The most common variant is headed + round + selectable tip. For detailed sizing guidance, see our Pin-Point Gate Tip Diameter and Length Selection Guide.

About Steel Pin Gate Bushings

Steel pin-point gate bushings are the standard gating components for three-plate injection molds. Made from SKH51 (AISI M2) high-speed steel with quench hardening, they provide excellent wear resistance for standard (unfilled) injection molding resins at a cost-effective price point.

All MISUMI steel pin gate bushings hold P dimension (tip diameter) tolerance of ±0.01 mm — critical for consistent gate vestige size and balanced filling in multi-cavity molds. Available in 11 variants covering headed/headless, round/angle gate transitions, and selectable/configurable tip specifications.

SKH51 / AISI M2Quench HardenedP Tolerance ±0.01 mm

Application Scenarios

Steel pin gate bushings serve different applications depending on the resin, part geometry, and gate quality requirements:

📱

Consumer Electronics Housings

Thin-wall ABS/PC housings with tight cosmetic requirements. Gate vestige must be small and clean.

Round gate transition with small tip diameter (P ≤ 1.2 mm) creates minimal vestige on visible surfaces. Headed type for easy maintenance during high-volume production.

Recommended:With Head — Round, Small Tip Diameter
🚗

Automotive Interior Components

Multi-cavity molds producing interior trim, clips, and connectors. Gate location constrained by part geometry.

Angle gate transition allows gating at non-perpendicular angles when the cavity geometry prevents direct top gating. Selectable tip length for standard plate stacks.

Recommended:Headless — Angle, Selectable Tip
🔧

Custom Mold Designs with Non-Standard Plates

Proprietary mold designs where plate thickness doesn't match standard gate bushing length increments.

Configurable tip length allows exact C dimension specification. Acute angle option provides additional geometry flexibility for complex runner layouts.

Recommended:Headless — Round, Configurable, Acute Angle

Frequently Asked Questions

What is the difference between round and angle gate transitions?+
Round gate transitions create a smooth, radiused path from the runner to the gate tip — best for standard applications and uniform flow. Angle gate transitions create a tapered path that can direct resin flow at a specific angle — used when the gate must approach the cavity at a non-perpendicular angle due to part geometry constraints.
When do I need a headed vs headless pin-point gate bushing?+
Headed (with head) bushings have a flange that sits on the runner plate surface, providing axial retention and easier installation/removal. Headless bushings press-fit directly into the plate bore — used when the runner plate surface must remain flat or when space is limited around the gate location. Headed is more common (~70% of installations).
What tip diameter tolerance does MISUMI hold on pin-point gate bushings?+
MISUMI holds P dimension (tip diameter) tolerance of ±0.01 mm on standard steel pin-point gate bushings. This precision ensures consistent gate vestige size and balanced flow in multi-cavity molds. The tolerance applies to both selectable and configurable tip length variants.
How do I specify the correct tip length for my mold plate thickness?+
Tip length (C dimension) must match the distance from the runner plate mounting surface to the cavity plate gate point. Selectable tip length models offer fixed increments (faster delivery). Configurable models allow custom tip lengths cut to your specification — choose configurable when your plate stack doesn't match standard increments. If total length exceeds the bushing maximum, add a pin gate extension bushing.

Engineering Resources

Comparison

Round vs. Angle Gate Transition: How Tip Geometry Affects Gate Quality

Compare gate mark quality, flow patterns, and application suitability between round and angle transitions.

Selection Guide

How to Select Pin-Point Gate Tip Diameter and Length for Your Mold

Step-by-step guide to specifying tip dimensions for your mold configuration.

Need a Custom Quote?

Specify your gate transition type (round/angle), tip diameter (P), tip length (C), head type, and material. Custom tip diameter and acute angle configurations available.

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✓ MOQ 1 piece✓ P tolerance ±0.01 mm✓ Custom tip configurations available