Standard product line-microlinea
Miniature high precision linear bearings.
L-series with stainless steel housing and brass retainer.
On request:
All stainless steel execution
With reduced bore tolerance
Materials:
Housing: stainless steel AISI 440C
Cage: brass
Shields: stainless steel AISI 302 or AISI 303
Balls: stainless steel AISI 440C
Lubrication: standard: Winsor Lube L245X (other oils on request)
Temperature: -40℃ to +80℃ or more with the appropriate lubricant
Bearings tolerances: bore diameter d+8/0 [μm]; outside diameter D 0/-8 [μm]
Recommended tolerances for shaft: 0/-6 μm
Max. press fit between the outer ring and housing: 1 to 3 μm
Calculation of the theoretical life expectancy for linear bearings
In Europe we consider a nominal life of 100000 meters travel distance; that is the reason of the 10^5 factor in the following formula (in Japan: 50000 meters). The load rating is calculated according to DIN 636.
General formulas:
The theoretical life has no practical value unless the following conditions are scrupulously observed:
Magnitude and direction of constant load carefully determined
Constant speed
Constant temperature not exceeding 100℃
Rigorous cleanliness in mounting and during running
Careful choice and dosage of lubricant
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