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     LuBo #500 Series Self-lubricating Bearings
         can be utilized where heavy loads must be
         supported at low to medium speeds.

     Bearings have high mechanical strength with
         excellent wear resistance and self-lubrication
         properties exhibiting stable performance and
         durability under severe operating conditions.

     No form of supplementary lubrications required.
         A film of solid lubricant is transferred to the shaft
         as it starts to run. In operation, both surfaces
         burnish quickly and result in a highly polished
         bearing surface capable of withstanding
         extreme pressure.

 

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Normally, bronze alloy is used as the base material for LuBo #500 series bearings by centrifugal or sand
casting. Other materials such as cast iron, stainless steel and even tool steels could be used according to
the applications involving extreme temperatures, environments corrosive to bronze, and loads exceeding
the compressive strength of bronze.
 

Bearing Materials

Code

#500SP

#500B

#500F #500S #500AL #500SPX #500HCA
Base
Metal
High Strength
Manganese  Bronze
Red
Brass
Cast
Iron
Stainless
Steel
Aluminum
Bronze
Special
Alloy
Special
Alloy
Application General Use
High Load
Under Water
General Use
Medium
Speed
High Temp.
+400C
(+725F)
Chemical
Resistance
High Temp.
+600C
(1,100F)
Sea water Higher Loads
than
#500SP
Higher Loads
than
#500SPX
NOTE: When used for high strength bearings, alloys LuBo #500SP, #500SPX and #500HCA require hardened shafts.

Solid Lubricants

A bearing and its mating surface should always be separated by a film of lubricant. LuBo produces
proprietary solid lubricant compounds consisting of graphite, PTFE, metallic oxides, white metals,
waxes, and other minerals that are compressed and heat treated into dense plugs. These plugs are
then installed into the base metal.

Lubricants used in LuBo products are solid, permanent, and completely self-lubricating, They are
constantly tested and monitored in our laboratories to ensure superior bearing performance.

LuBo produces different solid lubricants for both high temperature (greater than 300F) and aquatic
application. Please contact LuBo's application engineers for assistance with these special operating
conditions.

       

      Operating Conditions   

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Base Metal

Allowable Pressure

Allowable Velocity
(fpm)

Allowable
PV Value
(psi. fpm)

Max Temperature
(F)

(1)

(2)

(1)

(2)

(1)

(2)

(1)

(2)

#500SP

High Strength
Manganese
Bronze

4,300
(14,200)

4,300

98

196

46,000

92,000

570

300

#500B

Red Brass

2,100
(7,100)

2,100

160

320

28,000

46,000

750

300

#500F

Cast Iron

700
(10,500)

1,140

160

320

23,000

46,000

750

300

** Note: (   ) indicates Static Pressure, (1): Self-Lubricating, (2): Periodic Lubrication with grease/oil.

      Mechanical and Physical Properties

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Specific
Gravity

Tensile
Strength

  Brinell
Hardness (3,000Kg
    load)

Modulus
of
Longitudinal
Elasticity

Elongation

Thermal
Linear Expansion
Coefficient

Coefficient
of
Friction

Coefficient
of Heat
Conduction

Impact
Strength
(Notched
Izod)

psi

HB

Kpsi

%

x105/F

(min.)

cal/secF in

ft. lb./in

LuBo
#500SP

8.2

110,000

220

46,400~
65,300

12

1.6~2.0

0.04~0.2

0.90

37.5

LuBo
#500B

8.7

28,000

50~65
(500Kg
load)

44,300

15

1.6~1.8

0.04~0.2

0.77

18.4

LuBo
#500F

7.2

35,000

180

46,600~
60,600

-

1.0~1.2

0.04~0.2

0.55

5.5

LuBo #500SP: is high strength bronze that is best suited for high load operating conditions.
LuBo #500B: is red brass for use under medium load conditions that is also suitable for high
                          temperature applications.
LuBo #500F: is a superior cast iron for both high temperature and medium speed applications.
    Chemical Resistance

Code

#500SP

#500B

#500F

Remark

Concentration

Over
10%

Under
10%

Over
10%

Under
10%

Over
10%

Under
10%

  O:usable
  X:not usable

  S
:usable
       under
       influence

Hydrochloric Acid

X

S

X

O

X

X

Sulfuric Acid

X

O

X

O

O

S

Nitric Acid

X

X

X

X

X

X

Phosphoric Acid

X

X

X

X

X

S

Sodium Hydroxide

O

O

O

O

O

O

Graphite plugged, self-lubricating bearings are LuBo's specialty. Our proprietary solid lubricant is a
cured, compact cylinder inserted into holes machined through the bearing wall. This provides
higher quality and superior performance than the uncured lubricant mechanically forced into
grooves on the bearing surface.
LuBo is customer driven, and committed to quality, competitive
pricing, and JIT delivery.

 


Phones: (800) 638-1830 or (410) 358-3130 are available Monday-Friday 8:30 AM to 5:30 PM Eastern time.
Faxes: (800) 872-9329 or (410) 358-3142 & E-mail are available anytime.
Warehouse & showroom hours are Monday-Friday 10 AM to 5:30 PM.
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