TYPE 1
METAL RETAINER
DEEP GROOVE BEARING CAGES
|
Type: |
SnapIn® |
Description: |
Material-Stainless Steel AISI 410. One piece, stamped, with coined ball pockets and polished surfaces. Side entry snap-in assembly. Inner ring land controlled. |
Application: |
Application: A general purpose cage available only in miniature and instrument sizes. Maximum ball size: 3/32”. Maximum operating temperature of cage material: 600°F. Maximum speed with oil or greas: 250,000 dN. |
Type: |
Two-Piece Ribbon* |
Description: |
Description: Material-Stainless Steel AISI 430 or AISI 305. Two-piece, stamped ribbons to form ball pockets. |
Application: |
A general purpose cage for bearings with 5mm or greater bores. Available for many instrument sizes and certain spindle and turbine sizes. Depending on the size, assembly of the cage halves is accomplished by tightly clinching tabs on one of the halves or by rivets. Maximum operating emperature of the cage material: 900°F. Maximum speed with oil or grease: 250,000 dN. |
TYPE 2 SELF LUBRICATING TEFLON®
Putting BERALOY PARTS TO WORK FOR YOU
DATA SHEET for Beraloy 95-5
|
Physical Properties |
Units |
ASTM Method |
Actuals |
Tensile Strength |
PSI |
D1457-56T |
2400 |
Tensile Elongation |
% |
D1457-56T |
225 |
Compressive Strength |
PSI |
D695-54 |
1800 |
Compressove Modulus |
PSI |
D695-54 |
125,000 |
Flexural Strength |
PSI |
D740 |
1400 |
Hardness |
ShD |
D1760-61 |
65 |
Co. Thermal Expansion |
in x 10-5 |
D696-44 |
65 |
|
---- |
|
3.9-5.5 |
|
in x F
|
|
|
Thermal Conductivity |
BTU/in |
Cenco Finch |
2.67 |
|
---- |
|
|
|
hrsqftF |
|
|
Specific Gravity |
|
D1457-62 |
2.24 |
Deformation |
600psi/500F/24hrs |
|
4.3 - 9.0% |
Wear Factor |
K X 10-5 |
|
8 |
Co. of Friction |
Static - Dry |
|
0.14 |
|
Dynamic - Dry |
|
0.23 |
|
|
OUTGASING OF PLASTIC
MATERIALS IN VACUUMS
|
MATERIAL |
%TML |
%WVR |
%CVCM |
PEEK |
0.30 |
0.02 |
0.00 |
Ultem 1000 |
0.65 |
0.29 |
0.01 |
Polycarbonate |
0.30 |
0.25 |
0.04 |
Polysulfone |
0.40 |
N/A |
0.01 |
Acetal |
0.28 |
N/A |
0.02 |
PET Ertalyte |
0.37 |
N/A |
0.05 |
Torlon 4203 |
1.85 |
N/A |
0.00 |
Torlon 5030 |
0.58 |
N/A |
0.00 |
Fluorosint 500 |
0.05 |
N/A |
0.00 |
Beraloy 95-5 |
0.02 |
N/A |
0.01 |
RuionAR |
0.01 |
N/A |
0.01 |
RulonJ |
0.18 |
N/A |
0.01 |
Rulon 7035 |
0.03 |
N/A |
0.02 |
Rulon 123 |
0.01 |
N/A |
0.01 |
Rulon 641 |
0.01 |
N/A |
0.00 |
Rulon LR |
0.00 |
N/A |
0.00 |
Rulon 488 |
0.01 |
N/A |
0.00 |
Rulon 641 |
0.01 |
N/A |
0.00 |
Rulon W2 |
0.01 |
N/A |
0.00 |
Meldin 2001 |
1.63 |
1.04 |
0.01 |
Meldin 2021 |
1.38 |
0.69 |
0.00 |
PBI |
2.51 |
2.13 |
0.00 |
Noryl En265 |
0.17 |
N/A |
0.00 |
Noryl N300 |
0.25 |
N/A |
0.00 |
Noryl 534 |
0.04 |
N/A |
0.01 |
Tests conducted to ASTME595-77/84 and -90 by Goddard Flight Center, Greenbelt, Maryland.
BERALOY® 95-5 IS A REGISTERED TRADEMARK OF CHAMPION INDUSTRIES
TYPE 2 SELF LUBRICATING POLYIMIDE
Putting VESPEL® Parts to Work For You
SELF LUBRICATING VACUM COMPATIBLE
|
TABLE I: SUMMARY OF TYPICAL PROPERTIES (Machining Stock)
|
Property |
Method |
(°F)Temp |
Units |
SP-1 |
SP-21 |
SP—22 |
SP-211 |
SP-3 |
Tenaile Strength, |
ASTM |
73 |
PSI |
12,500 |
9,500 |
7,500 |
6,500 |
8,200 |
Ultimate |
D-638 |
500 |
PSI |
6,000 |
5,500 |
3,400 |
3,500 |
---- |
Elongation, |
ASTM |
73 |
% |
7.5 |
4.5 |
3.0 |
3.5 |
4.0 |
Ultimate |
D-638 |
500 |
% |
7.0 |
2.5 |
2.5 |
3.0
|
---- |
Flexural |
ASTM |
73 |
10^3 PSI |
450 |
550 |
700 |
450
|
---- |
|
D-790 |
500 |
10^3 PSI |
250 |
370 |
400 |
200
|
---- |
Compressive |
ASTM |
73 |
10^3 PSI |
350 |
420 |
475 |
300
|
---- |
Modulus |
D-695
|
|
|
|
|
|
|
|
WearRale, |
Unlub.
|
|
in/1000 |
.25-1.2 |
.09
|
.06
|
.07
|
.25-.33
|
PV = 25,000
|
|
|
hrs.
|
|
|
|
|
|
Friction Coeffient
|
|
|
|
|
|
|
|
|
Dynamic* |
Unlub.
|
|
|
.29
|
.24
|
.20
|
.12
|
.25 |
Static
|
|
|
|
.35
|
.30
|
.27
|
.20
|
---- |
Static in Vacuum
|
|
|
|
---- |
---- |
---- |
---- |
.03 |
Coefficient of
Linear Expansion |
E-228
|
73-572
|
10^6 in/in/of
|
30
|
27
|
21
|
30
|
---- |
Dielectric Constant
|
D-150
|
73
|
@10^4 Hz |
3.64
|
13.28
|
---- |
---- |
---- |
Underwriters Laboratory Flame Rating: 94-VO
|
VESPEL parts and machining stock are made by Du Pont from SP polyimide resins, available in these five compositions to provide a range of property combinations
|
RESIN
DESIGNATION |
DESCRIPTION |
CHARACTERISTICS |
SP-1 |
Unfilled base resin |
Provides maximum physical properties
electncal and thermal insulation |
SP-21 |
*15%, by weight,
graphite filler |
Graphite added to provide low wear and friction
for bearings, thrust washers, and dynamic seals |
SP-22 |
*40%, by weight,
graphite filler |
Same as SP-21 for wear and friction plus improved
dimensional stability. It has the lowest coefficient
of thermal expansion. |
SP-211
|
*15%, by weight, graphite
and 10% by weight TEFLON®
fluorocarbon resin fillers |
Has lowest coefficient of friction over wide range
of operating conditions. Also, has lowest wear rate
up to 300oF. |
SP-3 |
*15%, by weight,
molybdenum disulfide |
MoS2 added to provide lubrication for seals and
bearings in vacuum or dry environments. |
*Nominal
DU PONT REGISTERED TRADEMARK FOR POLYMIDEPARTS AND MACHINING STOCK
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