YH-ML High-Temperature Self-Lubricating Liner Plates

What YH-ML liner plates are

A liner plate is a sacrificial wear part bolted to a surface that slides against another. YH-ML is a self-lubricating wear alloy used for that purpose: the plate takes the wear so the machine body does not, and its sliding face keeps a lubricating film at the interface instead of relying entirely on external grease.

That matters where lubrication is marginal and maintenance access is poor. In a short oil-starvation event a bronze liner can pick up on the counterface, heat and seize; a YH-ML plate keeps sliding on its own film long enough for the machine to be stopped and the grease line checked. For surfaces running inside the limits below, it also costs less than a bronze liner of the same size.

Technical data

Material	YH-ML self-lubricating wear alloy
Continuous service temperature	up to 120 C
Surface pressure	up to 5 MPa
Sliding speed	up to 40 m/s
Lubrication	Self-lubricating; survives short oil starvation without seizing
Machining	Longitudinal / annular / spiral grooves, oil holes, bolt holes, counterbores, chamfers to drawing
Typical shapes	Strip and square plates; thickness and hole pattern to drawing
Ordering	By drawing, by sample, or by on-site measurement

Where it replaces bronze

The switch is worth testing when three conditions hold at once: the sliding face runs at 120 C or below, surface pressure stays under about 5 MPa, and the failure you keep seeing is lubrication-related rather than overload. Under those conditions a YH-ML plate does the same job as a bronze liner with far less sensitivity to grease interruption.

Where any of the three is exceeded, keep bronze or Babbitt. High temperature softens the alloy, and at pressures well above 5 MPa a bronze liner distributes load over a larger true contact area. Judging the wrong one of those two variables is the usual reason a liner replacement disappoints.

• Rolling mill guide and entry / exit liner plates where grease intervals are long
• Heavy equipment sliding faces that see intermittent motion and dirt
• Bronze liner replacement on medium-load, medium-speed surfaces
• Wear pads on chutes and transfer points where a bolted plate is easier to renew than a welded one

Machining and installation

Grooves are not decoration: they carry lubricant into the loaded zone. Longitudinal grooves suit reciprocating motion, annular grooves suit rotating contact, and a spiral layout spreads grease across the full face. Oil holes are positioned to meet the grease nipple or the existing drilled passage in the housing.

On installation, clean the backing face and check flatness before bolting. Tighten evenly in a cross pattern; a plate sitting on a high spot carries load on a small area, and the resulting edge pressure is what cracks liners, not the alloy itself. Where the counterface is worn or scored, machine or replace it at the same time, otherwise the new plate runs against a damaged surface.

Typical applications

Frequently asked questions

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