Burker - Product

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Meteral

Material grade¡GL1~L20
Max. Compressive strength is about 60 kg/mm2 and higher than Bronze (PBC)
Max. service temperature: 145~250

Standard Material Grades

Basic
Grade
10Nmm^-2

L1
L2
L3
L4
L6
L7
L10
L11
L14
L15
L16
L18
L20

Max
Flatwise
Compression
10Nmm^-2

345
414
255
414
311
442
442
407
unbroken
428
428
530
140

Max
Edgewise
Compression
10Nmm^-2

97
166
105
166
159
186
173
207
unbroken
173
166
186
55

Max
Operating
Temp

-
-
145
140
145
180
250
160
-
180
250
180
250

Matrix
Hardness
Barcol
Oo

45
43
45
43
43
46
46
43
-
46
46
46
-

Density - All approximately 1.3 g/cc and Nominal Composite Hardness - All approximately 100 Rockwell M unless used with metallic fillers or modifying additives.

Material Grades

GRADE	MAXIMUM FLATWISE COMPRESSION		MAXIMUM EDGEWISE COMPRESSION		DENSITY g/cc	MAXIMUM OPERATING TEMPERATURE	MATRIX HARDNESS BARCOL	NOMINAL COMPOSITE HARDNESS
GRADE	psi	N/mm²	psi	N/mm²	DENSITY g/cc	MAXIMUM OPERATING TEMPERATURE	MATRIX HARDNESS BARCOL	NOMINAL COMPOSITE HARDNESS
L1 - Basic	50000	345	14000	97	All approx. 1.3 g/cc unless used with metallic fillers or modifying additives.	~	45	All approx. 100 Rockwell M unless used with metallic fillers or modifying additives.
L2 - Marine	60000	414	24000	166		~	43
L3 - General Engineering	40000	276	14000	97		145	45
L4 - Engineering	60000	414	24000	166		140	43
L5 - Acid Resistant	54000	372	24000	166		140	43
L6 - Alkali Resistant	45000	311	23000	159		145	43
L7 - Enhanced Temperature	64000	442	27000	186		180	46
L8 - Very Low Friction	55000	380	20000	138		145	43
L9 - Fire Retardant (Mining)	47000	325	14000	97		135*	45
L10 - High Temperature	64000	442	25000	173		250	46
L11 - Low Directionally	59000	407	30000	207		160	43
L12 - Super Conductive	76000	525	~	~		180	46
L14 - Elastomeric	Did not fail					~	~
L15 - High Load Low Friction	62000	428	25000	173		180	46
L16 - High Temp. Low Friction	62000	428	24000	166		250	46

FRICTION & PV

There is no such thing as a coefficient of friction or PV for a material!
What we are talking about is a coefficient of friction or PV for a BEARING SYSTEM
- What is the material
- What is the mating material
- What are the surface finishes
- What is the environment
- What is the temperature
All these and more form a BEARING SYSTEM