Each plate starts as a centrifugally cast high-strength copper alloy. Solid graphite plugs are then inserted into drilled holes on the sliding face, arranged in a pattern matched to the load and travel of the application. As the mating surface moves, the graphite transfers onto the counterface and builds a thin, uniform solid-lubricant film.

• No external lubrication: the graphite supply is built in, so there is no oil line, no grease nipple, and no relubrication schedule.
• Foreign-particle tolerance: the graphite plugs can absorb small debris, protecting the rail or shaft from scoring.
• Stable under load: the bronze substrate carries the load; the graphite only handles friction, so each material does the job it is suited for.
• Clean operation: suitable for processes where oil leakage would contaminate product or workspace.

In press tools and stamping dies, the plate has to absorb the lateral thrust generated when the die closes, and keep the upper and lower dies aligned while the ram repeats its stroke. A single L-shaped plate does both jobs:

• Guiding in two perpendicular directions — one plate replaces two separate flat wear plates.
• Uniform load distribution — the L cross-section spreads contact stress and reduces edge loading.
• Compact mounting — less space than a two-plate arrangement, which matters inside die sets.
• Shock resistance — the bronze body withstands impact loading from press operations.

For flat or T-shaped guiding surfaces, see our self-lubricating wear plates overview and T-shaped graphite plates; for complete gib assemblies, refer to the base plates for gib assemblies.