DP4

Metal Polymer Dry Bearings

DP4

DP4, Dry Bearings, Steel backing, Lead Free

DP4 bearings

● Metal-polymer-composite material

● Steel Backing + porous bronze sinter + PTFE + CaF2 + Fillers

● Self-lubricating & Maintenance-free

■ Features

1. DP4 Dry Bearings material is compliant with the European Union's End of Life Vehicles ( ELV ) directive 2000/53/EC on the elimination of hazardous materials in the construction of passenger cars and light trucks.
2. DP4 Dry Bearings material is compliant with the European Union Directive 2002/95/EC concerning the restriction of the use of certain hazardous substances in electrical and electronic equipment ( RoHS Regulation ).
3. DP4 Dry Bearings material has good wear resistance and low friction performance over a wide range of loads, speeds and temperature conditions.
4. DP4 Dry Bearings material has very good performance in oil lubricated heavy duty hydraulic applications.
5. DP4 Dry Bearings material offers benefits in applications where corrosion of the lead in DU may occur.
6. DP4 Dry Bearings material offers improved wear and friction performance along with good chemical resistance compared to DU Dry Bearings material.
7. DP4 Dry Bearings material performs well in dry under light duty applications.
8. DP4 Dry Bearings material is particularly suitable for intermittent operation under reciprocating or oscillating movements.

■ Physical & Mechanical Properties

Items	Value	Unit
Maximum Operating Temperature Tmax	280	°C
Minimum Operating Temperature Tmin	-200	°C
Maximum Static Load Psta,max	250	N/mm2
Maximum Dynamic Load Pdyn,max	140	N/mm2
Maximum Sliding Speed V-dry	2.5	m/s
Maximum Sliding Speed V-oil lubricated	5	m/s
Maximum PV Factor-dry	1	N/mm2 * m/s
Maximum PV Factor-oil lubricated	10	N/mm2 * m/s
Coefficient of friction f-dry	0.04-0.25
Coefficient of friction f-oil lubricated	0.02-0.08

■ Usage Range

dry	good
oil lubricated	very good
grease lubricated	good
water lubricated	fair
process fluid lubricated	good

■ Possible Application

Automotive:
McPherson struts and shock absorbers, doors, bonnets and tailgate hinges, steering columns, clutches, gearbox selector fork guides, wiper arms, power steering pumps, pedal bushes, ABS equipment, etc.

Industrial:
Aerospace, agricultural equipment, construction equipment, material handling equipment, forming machines-metal, plastic and rubber, office equipment, medical and scientific equipment, packaging equipment, pneumatic and hydraulic cylinders, pumps and motors, railroad and ramways, textile machinery, valves, etc.

■ Standard Parts Available

Cylindrical Bush

Flanged Bush

Thrust Washer

Flanged Washer

Strip / Plate

DP4 cylindrical bush