| 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. | |
