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
With Head — Round, Selectable Tip
Round gate transition (SR), selectable tip length
With Head — Angle, Selectable Tip
Angle gate transition, selectable tip length
With Head — Round, Pilot Tip Hole, Configurable
Round gate with pilot hole, configurable tip length
With Head — Round, Small Tip Diameter
Round gate transition, small tip diameter (P ≤ 1.2 mm)
Headless — Round, Small Shank Diameter
Round gate, small shank for compact mold designs
Headless — Round, Selectable Tip
Round gate transition, selectable tip length
Headless — Angle, Selectable Tip
Angle gate transition, selectable tip length
Headless — Round, Configurable, Acute Angle
Round gate, configurable tip length, acute angle option
Headless — Round, Configurable Tip + Diameter
Round gate, both tip length and diameter configurable
Headless — Angle, Configurable, Acute Angle
Angle gate, configurable tip length, acute angle option
Headless — Round, Large Gate Angle, Acute Option
Round gate, large gate angle, configurable tip length
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:
| Feature | Round Gate (With Head) | Angle Gate (With Head) | Round Gate (Headless) | Angle Gate (Headless) |
|---|---|---|---|---|
| Gate Transition | Smooth SR radius — uniform flow | Tapered angle — directional flow | Smooth SR radius — uniform flow | Tapered angle — directional flow |
| Head Type | Flanged head — axial retention | Flanged head — axial retention | Press-fit — flush surface | Press-fit — flush surface |
| Tip Length Options | Selectable or configurable | Selectable | Selectable or configurable | Selectable or configurable |
| Pilot Tip Hole | Available (PGHTBL type) | Not available | Not available | Not available |
| Acute Angle Option | Not available | Not available | Available | Available |
| Small Diameter | Available (P ≤ 1.2 mm) | Not available | Available (small shank) | Not available |
| P Tolerance | ±0.01 mm | ±0.01 mm | ±0.01 mm | ±0.01 mm |
| Best For | Standard 3-plate molds, most common choice | Gates at non-perpendicular angles to cavity | Compact molds, flush runner plate | Compact molds with angled gating |
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:
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.
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.
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.
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.
Frequently Asked Questions
What is the difference between round and angle gate transitions?+
When do I need a headed vs headless pin-point gate bushing?+
What tip diameter tolerance does MISUMI hold on pin-point gate bushings?+
How do I specify the correct tip length for my mold plate thickness?+
Engineering Resources
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.
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.