Oil-Free Leader Bushings
Self-lubricating bushings with embedded solid lubricant — pair with oil-free leader pins for completely maintenance-free, contamination-free mold guidance.
Oil-Free Leader Bushings Products
Oil-Free Bushing — PTFE Embedded
Bronze + PTFE/Graphite | Maintenance-free | H7 bore
Oil-Free Bushing — Graphite Embedded
Bronze + PTFE/Graphite | Maintenance-free | H7 bore
Oil-Free Bushing — Flanged
Bronze + PTFE/Graphite | Maintenance-free | H7 bore
Oil-Free Bushing — Press-Fit
Bronze + PTFE/Graphite | Maintenance-free | H7 bore
Self-Lubricating Material Properties
Oil-free leader bushings use the same composite technology as oil-free leader pins: a bronze matrix with embedded pockets of solid lubricant. When paired with a matching oil-free leader pin, both surfaces transfer lubricant to each other, creating a low-friction interface without any external lubrication.
Key properties of the self-lubricating composite:
- Operating temperature: -40°C to +300°C (graphite version) or -40°C to +200°C (PTFE version)
- PV limit: 3.0 N/mm² × m/s (PTFE) to 5.0 N/mm² × m/s (graphite) — within mold leader pin operating range
- Friction coefficient: 0.05-0.15 (vs 0.15-0.30 for dry metal-on-metal)
About Oil-Free Leader Bushings
Oil-free leader bushings contain embedded solid lubricant (PTFE or graphite) distributed throughout the bronze matrix. When paired with matching oil-free leader pins, they create a completely maintenance-free guidance system with zero contamination risk. Required for FDA-regulated food packaging molds, ISO Class 7+ cleanroom production, and medical device manufacturing.
Application Scenarios
FDA Food-Contact Molds
Food packaging molds must comply with FDA 21 CFR 177 — any lubricant migration to product surfaces violates regulations.
Why it fits: Oil-free bushings eliminate all lubricant from the mold guidance system, making FDA compliance automatic.
ISO 13485 Medical Device Molds
Medical device molds require validated cleaning processes if lubricants are present — adding cost and compliance burden.
Why it fits: No lubricant = no cleaning validation needed. Oil-free bushings simplify ISO 13485 compliance.
Frequently Asked Questions
What self-lubricating materials are used in oil-free leader bushings?+
Are oil-free bushings suitable for high-temperature molds?+
What is the expected service life of oil-free leader bushings?+
Engineering Resources
Need Custom Oil-Free Leader Bushings?
Precision oil-free leader bushings manufactured to JIS and DIN standards. Custom dimensions available. MOQ 1 piece.