Tolerances for Mounting & Interference Fits For Plastic Race Radial Ball Bearings
DIAMETRIC CLEARANCE "radial play"
OUTSIDE DIAMETER (Maximum)
free turning to .008"
free turning to .009"
free turning to .010"
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.
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.
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%
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.
Recommenced maximum service temperature in air for Plastic Raceways.
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.