|
Tolerances for
Plastic Race Radial Ball Bearings | Tolerance
for 316 Stainless Race Ball Bearings
Corrosion Resistance for 316 Stainless | Chemical
Compatibility
PBT Properties | Temperature Range
for Plastics | Application Review Questionaire
Tolerances for
Mounting & Interference Fits
For Plastic Race Radial Ball Bearings
| BORE |
| MINIMUM |
MAXIMUM |
GENERAL
TOLERANCE |
| 0.000" |
0.750" |
+.003", -.0" |
| 0.751" |
1.250" |
+.004", -.0" |
|
| WIDTH |
MAXIMUM
DIAMETER |
GENERAL TOLERANCE |
| 3.000" |
+/- .005" |
| 4.000" |
+/- .008" |
| 5.000" |
+/- .010" |
|
|
OUTSIDE DIAMETER
|
| MINIMUM |
MAXIMUM |
GENERAL
TOLERANCE |
| 0.000" |
1.000" |
+.0", -.003" |
| 1.001" |
1.625" |
+.0", -.004" |
| 1.626" |
2.000" |
+.0", -.005" |
| 2.001" |
3.000" |
+.0", -.006" |
|
|
DIAMETRIC CLEARANCE "radial play"
|
BORE
(Maximum) |
OUTSIDE
DIAMETER
(Maximum) |
GENERAL
TOLERANCE |
| 0.187" |
1.000" |
free turning to .008" |
| 0.500" |
1.625" |
free turning to .009" |
| 0.750" |
2.000" |
free turning to .010" |
| 1.250" |
3.000" |
free turning to .012" |
|
|
PLASTIC RING CHARACTERISTICS
Plastic will expand and contract in proportion to the amount of
interference pressure. Any press fit to the rings will reduce the
diametric clearance in proportion to the amount of the interference
fit. The maximum amount for overall interference fit for general
practice should not exceed 1/2 of the nominal radial play dimension.
INTERFERENCE FITS
A typical application would be a press fit to one ring and a slip
fit to the other. Using the above criteria, a bearing with .008"
radial play would allow you to apply a maximum of .003" press
fit to one ring and maximum of .001" slip fit the other. It
is recommended that the customer measure the actual bearing to be
used for calculating shaft and housing fits.
NOTE:These are general manufacturing tolerances.
They may vary depending on material type and bearing design. For
diameters larger than listed please contact KMS for engineering
data and availability.
|
For 316 Stainless
Race Ball Bearings
|
BORE |
| MINIMUM |
MAXIMUM |
GENERAL
TOLERANCE |
| 0.000" |
1.250" |
+.003", -.0" |
|
| WIDTH |
MAXIMUM
DIAMETER |
GERNERAL TOLERANCE |
| 2.500" |
+/- .005" |
|
|
OUTSIDE DIAMETER |
| MINIMUM |
MAXIMUM |
GENERAL
TOLERANCE |
| 0.000" |
2.500" |
+.0", -.003" |
|
DIAMETRIC CLEARANCE
"radial play" |
BORE
(Maximum) |
OUTSIDE
DIAMETER
(Maximum) |
GENERAL
TOLERANCE |
| 0.250" |
1.000" |
free turning to .007" |
| 0.500" |
2.000" |
free turning to .008" |
| 0.750" |
2.500" |
free turning to .010" |
|
|
MOUNTING PRACTICE
|
|
316 STAINLESS RING CHARACTERISTICS
AISI 316 stainless steel is a non harden-able food and medical grade
stainless. KMS 316 stainless raceways are semi-precision, unground
type. Due to the tolerance range of a semi-precision bearing
ring, it is recommended that the customer measure the actual bearing
to be used for calculating shaft and housing fits.
INTERFERENCE FITS
A typical application would be a press fit to one ring and a slip
fit to the other. The maximum press fit would be .001 and a slip
fit would be maximum of a line to line fit to the actual dimension.
For example, using the above criteria, a bearing with a 1/2"
bore and a outside diameter of 1-3/8" would have a bore tolerance
of +.003, -.0 and an outside diameter tolerance of +.0, -.003. The
actual dimension of the inner ring is .501 and the outer ring is
1.374. To achieve a slip fit on the inner ring the shaft would have
to be .501 to .502 and a press fit to the outer ring would require
the housing to be 1.373 to 1.374.
Note: These are general manufacturing tolerances,
They may vary depending on bearing design.
Information presented is believed to be accurate
at the time of publication but is subject to change without notice.
|
Corrosion
Resistance For 316 Stainless
| |
MATERIALS |
316 STAINLESS |
440C STAINLESS* |
CHROME STEEL* |
| WATER |
Stream |
A |
B |
-- |
| Domestic Water |
A |
B |
D |
| Sea Water |
A |
-- |
D |
| FOOD |
Food Products |
A |
B |
-- |
| Fruit & Veg. Juices |
A |
B |
-- |
| Dairy Products |
A |
C |
-- |
| LIQUOR |
Hot Sulfite |
B |
-- |
-- |
| Dye |
D |
D |
-- |
| DILUTE ACIDS |
HCL |
-- |
-- |
-- |
| H2SO4 |
B |
-- |
-- |
| HNO2 |
A |
A |
-- |
| Phosphoric |
B |
-- |
-- |
| ACIDS |
H2SO4 |
A |
-- |
-- |
| HNO2 |
-- |
-- |
-- |
| Phosphoric |
A |
-- |
-- |
| |
Industrial Atmospheres |
B |
B |
C |
| Salt Air |
A |
C |
C |
| Ammonia |
A |
C |
B |
| Alkaline Salts |
B |
B |
C |
| A = excellent, B = good, C = fair, D = poor, --
= Will not withstand conditions*Please note that KMS does not manufacture
bearings made from either 440C or Chrome Steel. They are listed for
comparison to 316 stainless only. |
MATERIAL COMPOSITION*
316 STAINLESS |
Carbon: Maximum
of 0.080%
Manganese: Maximum of 2.00%
Phosphorus: Maximum of 0.045%
Sulfur: Maximum of 0.030%
Silicon: Maximum of 1.00%
Chromium: 16.00% to 18.00%
Nickel: 10.00% to 14.00%
Nitrogen: Maximum of 0.010%
Molybdenum: 2.00% to 3.00%
*ref per ASTM A276-89a |
|
|
| MATERIAL CONVERSION |
| |
(AGENCY) |
| Material |
AISI |
Federal |
ASTM |
UNS |
AMS |
| 316 Stainless |
Type 316 |
QQ-S-763E |
A276-89a |
S31603 |
5648G |
|
| |
ACETAL
(POM) |
POLYPRO-
PYLENE |
KYNAR®
(PVDF) |
VALOX®
(PBT) |
NYLON |
PEEK® |
TORLON® |
VESPEL® |
UHMW-
PE |
ACIDS WEAK
73 degrees |
A |
A |
A |
A |
A |
A |
A |
A |
A |
ACIDS STRONG
73 degrees |
U |
A |
A |
L |
U |
L |
L |
L |
L |
| |
|
|
|
|
|
|
|
|
|
ALKALIES,
WEAK
73 degrees |
A |
A |
A |
L |
A |
A |
L |
A |
A |
ALKALIES,
STRONG
73 degrees |
U |
A |
L |
A |
A |
A |
L |
A |
A |
| |
|
|
|
|
|
|
|
|
|
| HYDROCARBONS |
A |
A |
A |
L |
A |
A |
A |
A |
L |
| |
|
|
|
|
|
|
|
|
|
| KETONES |
A |
A |
U |
L |
A |
A |
A |
A |
A |
| |
|
|
|
|
|
|
|
|
|
| ETHERS |
A |
- |
A |
- |
A |
- |
A |
- |
A |
| |
|
|
|
|
|
|
|
|
|
| ESTERS |
A |
L |
A |
A |
A |
A |
A |
- |
A |
| |
|
|
|
|
|
|
|
|
|
| ALCOHOLS |
A |
A |
L |
L |
A |
- |
L |
- |
A |
A = ACCEPTABLE
L = LIMITED
U = UNACCEPTABLE
- = NO RATING
This chart is for reference only, KMS recommends
testing in actual chemical concentrations to be encountered.
Information presented is believed to be accurate at the time of publication
but is subject to change without notice. |
| Properties |
Unit |
Test Method |
|
| Mechanical |
| Tensile strength at yield |
N/mm2
|
ASTM D 638 |
115 |
at break
|
N/mm2
|
ASTM D 638 |
- |
| Elongation at yield |
% |
ASTM D 638 |
3 |
at break
|
% |
ASTM D 638 |
|
| Tensile modulus |
N/mm2
|
ASTM D 638 |
8000 |
| Flexural yield strength |
N/mm2
|
ASTM D 790 |
- |
| Flexural yield strength |
N/mm2
|
ASTM D 790 |
170 |
| Flexural modulus |
N/mm2
|
ASTM D 790 |
7000 |
| Notched impact strength Charpy |
K/m2 |
DIN 53453 |
12 |
| Notched impact strength IZOD |
J/m |
ASTM D 256 |
100 |
| Hardness, |
|
|
|
H358/10
|
N/mm2
|
DIN 53456 |
104 |
H358/60
|
N/mm2
|
DIN 53456 |
101 |
Rockwell
|
— |
ASTM D 785 |
L102 |
| Thermal |
| Oxygen index* |
% |
ASTM D 2863 |
19 |
| Flame retardancy* |
— |
UL stand 94 |
94HB |
| (1/6 mm thickness) |
|
|
|
| Heat resistance: Vicat, method B |
°C |
ASTM D 1525 |
210-215 |
| Thermal conductivity |
W/m2C
|
ASTM C 177 |
0.19 |
| Mould shrinkage flow |
% |
ASTM D 1299 |
0.4 - 0.6 |
| Cross flow direction |
% |
ASTM D 1299 |
0.6 - 0.8 |
| Physical |
| Water absorption |
— |
ASTM D 570 |
|
| 24 Hrs, 23°C |
% |
|
0.06 |
| CHEMICAL RESISTANCE OF PBT |
| Chemical Media |
°C |
Immulation % Days |
% Retention of strength |
| Acids |
| 10% Hydrochloric |
23 |
30 |
89 |
| 23 |
90 |
85 |
| 23 |
180 |
82 |
| 10% Sulfuric |
23 |
30 |
97 |
| 23 |
90 |
94 |
| 23 |
180 |
90 |
| 35% Sulfuric (battery) |
23 |
30 |
97 |
| 23 |
180 |
96 |
| 66 |
30 |
84 |
| 66 |
180 |
35 |
| 10% Acetic |
23 |
30 |
89 |
| 23 |
180 |
88 |
| Bases |
| 5% Potassium Hydroxide |
23 |
30 |
83 |
| 23 |
90 |
10 |
| 10% Sodium Hydroxide |
23 |
30 |
2 |
| 23 |
180 |
- |
| 10% Ammonium Hydroxide |
23 |
30 |
90 |
| 23 |
90 |
87 |
| 23 |
180 |
58 |
| Organic Solvents |
| Ethyl Alcohol |
23 |
30 |
99 |
| 23 |
180 |
94 |
| Methyl Alcohol |
23 |
30 |
91 |
| 23 |
180 |
76 |
| Isopropyl-Alcohol |
23 |
30 |
100 |
| 23 |
180 |
100 |
| Isopropyl-Alcohol & Water
(50-50) |
23 |
30 |
93 |
| 23 |
180 |
96 |
| Turpentine |
23 |
180 |
92 |
| 23 |
30 |
66 |
| Acetone |
23 |
180 |
63 |
| 23 |
30 |
90 |
Temperature Range for Plastics
|
Recommenced maximum service temperature in
air for Plastic Raceways.
| Materials |
°F/°C
|
| Polypropylene |
140/60
|
| Acetal |
180/82
|
| PBT Polyester |
158/70
|
| Peek |
338/170
|
| Minlon® |
400/204
|
| Nylon 612 |
181/83
|
| Polysulfone |
329/165
|
| UHMW-PE |
130/55
|
| Torlon® |
457/236
|
| PVC |
180/71
|
| Kynar® (PVDF) |
183/84
|
Minlon is registered trade mark of the Dupont
Corporation.
Torlon is registered trade mark of the Amoco Corporation.
Kynar is a registered trade mark of the Autochem Corporation.
* This chart is for reference only. KMS
recommends testing in actual environment to be encountered. Information
presented is believed to be accurate at the time of publication
and is subject to change without notice.
No warranty, neither expressed or implied
is given regarding the accuracy of this information. The user assumes
all risk and liability in connection with the use of KMS information.
|
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