For New Technology Network. MLE Bearings BEAREE. corporation

Transcription

1 For New echnology Network corporation R MLE Bearings

2 MLE bearings are environmentally-friendly, clean, lead-free sliding bearings that exhibit excellent sliding characteristic under high surface pressures. he "E" in MLE stands for "eco-material." 1. Features 3. Structure Oilless sliding bearings capable of use with great loads Useable in a wide temperature range from very low to very high temperatures hin walls (1. to 2. mm) help realize a very compact design Low friction coefficient (:.4.2) Boasts excellent wear resistance and is capable of operation for a long time he structure of an MLE bearing is comprised of three layers -- a steel sheet as a backing metal, a porous sintered layer prepared by sintering bronze powder on the steel sheet and a resin layer formed by impregnating the porous sintered layer with a silicone tetrafluoride resin that contains a special filler. his structure boasts a greater load bearing capacity and good heat dissipation performance, and it can operate for a prolonged period without needing relubrication. he steel sheet backing metal is tin-plated for better corrosion resistance. 2. Characteristics Sintered layer Resin layer Allowable surface pressure 4MPa13MPa kgf/cm 2 kgf/cm 2 Allowable sliding velocity 1m/min Allowable PV value MPam/min1kgf/cm 2 m/min Steel sheet Operating temperature range 2 C2 C Values in ( ) were obtained in a static loading condition and the test results are from NN bearing test methods.

3 4. Allowable PV values A PV value is expressed as the product of a surface pressure P and a sliding velocity V, wherein the PV values possible with a normally operating bearing are the allowable PV values for that bearing. Allowable surface pressure P 13MPa kgf/cm 2 Allowable operating range Allowable PV values MPam/min 1kgf/cm 2 m/min Allowable sliding velocity V 1m/min. Estimated wear he amount of wear on a given bearing can vary depending on the sliding velocity, surface pressure, operating mode, lubrication conditions, surface roughness of the mating material, ambient temperature and other parameters related to that bearing. Usually, the amount of wear for a particular bearing can be determined with the expression below: R=KPV where, Rmm of wear Kspecific wear mm 3 /Nm Non-lubricationK=1.1 - oil-lubricationk=1.1 - Psurface pressure in MPa Vsliding velocity in m/min time in min o help minimize the amount of wear, we recommend the use of a shaft with a surface roughness that ranges from.1 to. mra and a hardness that is higher than HRC.. Fit and clearance. Installation method he recommended values for the shaft and housing for MLE and MLEF bearings are given in the dimensions table. Assuming that the housing is a rigid body and its wall thickness does not vary when it is press-fit, the clearance between an MLE or MLEF bearing and its shaft can be defined as follows: Minimum clearance = (housing I.D. min - 2max wall thickness)max shaft dia. Maximum clearance = (housing I.D. max - 2min wall thickness)min shaft dia. If you intend to use a shaft or housing that has a other than one that is recommended, be extremely careful to provide an acceptable clearance. When press-fitting an MLE bearing, do not drive it in with a hammer etc. For the press-fitting operation, use a press-fitting tool / mandrel like the one illustrated below. Provide a sufficiently large guide surface on the inlet of the housing, center the shaft with the housing bore, and then press-fit the bearing using a press. Preferable types of chamfering are R-chamfering and taper-chamfering. When using C-chamfering (C1. or lower), make sure that the chamfered area is free from burs. Press ram D Press-fitting rod d Bearing Housing Press-fitting rod dimensions: Dhousing I.D..3.4 d bearing I.D..2.3

4 Dimension table for MLE bearings. MLE Bearings d D MLE MLE4 4 MLE MLE MLE MLE MLE MLE3 MLE4 MLE MLE MLE MLE MLE MLE MLE MLE MLE MLE1 MLE4 MLE MLE MLE MLE1 MLE MLE13 MLE MLE1 MLE1 MLE1 MLE1 MLE11 MLE1 MLE1 MLE1 MLE1 MLE1 MLE11 MLE11 MLE21 MLE1 MLE1 MLE1 MLE21 MLE 1 MLE MLE MLE1 MLE MLE MLE MLE MLE1 MLE2 MLE MLE MLE2 MLE3 MLE MLE4 MLE MLE1 MLE MLE13 MLE MLE MLE MLE1 MLE1 MLE1 MLE2 MLE MLE MLE MLE3 MLE MLE MLE4 MLE MLE MLE MLE MLE MLE2 MLE2 MLE2 MLE2 MLE12 MLE MLE MLE2 MLE2 MLE MLE MLE3 MLE2 MLE MLE MLE MLE2 MLE2 MLE2 MLE2 MLE2 MLE2 MLE1 MLE1 2 MLE MLE MLE1 MLE2 MLE MLE MLE MLE2 MLE3 MLE MLE MLE3 MLE4 MLE4 MLE MLE MLE MLE3 MLE3 MLE3 MLE MLE MLE33 MLE3 MLE3 MLE43 MLE43 MLE3 MLE3 MLE3 MLE3 MLE3 MLE3 MLE3 MLE3 MLE3 MLE13 MLE113 3 LengthL -.4 R-MLE Length Inner Model code Indication of Serial Number MLE MLE3 MLE MLE MLE4 MLE4 MLE MLE MLE MLE MLE MLE MLE1 MLE11 Inner Outer

5 MLE4 MLE MLE3 MLE4 MLE4 MLE MLE MLE MLE4 MLE4 MLE4 MLE4 MLE4 MLE4 MLE4 MLE4 MLE4 MLE4 MLE MLE1 MLE4 MLE4 4 MLE3 MLE MLE4 MLE4 MLE MLE MLE MLE MLE MLE MLE MLE MLE MLE1 MLE1 MLE1 MLE1 MLE MLE1 MLE MLE MLE MLE MLE MLE MLE MLE MLE MLE MLE1 MLE MLE MLE1 MLE11 MLE MLE MLE MLE MLE MLE MLE MLE13 MLE MLE MLE MLE MLE1 MLE MLE11 MLE MLE1 MLE1 MLE1 1 Min. Max LengthL -.4 Wall thickness Recommended dimensions Shaft H Housing Dimensions to be measured at C / Unit in mm Installed clearance (When installed to H cemented carbide housing) d D 3 2 Interface. l NOE: he chamfering dimensions for bushes with outside s of 1 mm or smaller or lengths mm or smaller somewhat differ from those illustrated the dimensions are post-chamfering dimensions..

6 . Dimension table for MLEF bearings Small split permissible l R3. max. Wall thickness 1 Inner Outer Flange O.D. d D FD 1 13 MLEF4 MLEF MLEF LengthL -.4 MLEF MLEF MLEF MLEF1 FD -. 3 R Notes 1).. 2 D MLEF MLEF MLEF MLEF MLEF1 MLEF MLEF1 MLEF11 MLEF1 MLEF1 MLEF1 MLEF MLEF11 Wall thickness 2 2 MLEF21 Notes 1. Dimension R in the above diagram is. or smaller when the wall thickness 1 = 1., and 1. or smaller when the wall thickness 1 = 1. or greater. 2. he chamfering dimensions for bushes with outside dia. 1 mm or smaller or lengths mm or smaller somewhat differ from those illustrated the dimensions are post-chamfering dimensions MLEF1 MLEF1 4 Indication of Serial Number R-MLEF Length Inner Model code Dimension table for MLEW bearings Knock-pin hole : 1 pos. P.C.D d D Indication of Serial Number R-MLEW Recess Bush inside dia. Model code Bush Bush I.D. MLEW I.D. of bush used with MLEW Model number MLEW MLEW MLEW1 MLEW MLEW MLEW MLEW1 MLEW2 MLEW MLEW MLEW MLEW3 MLEW MLEW4 MLEW4 MLEW Inner Outer Wall thickness d D mm mm mm

7 LengthL -.4 Wall thickness Dimensions to be measured at C / Unit in mm Recommended dimensions Installed clearance (When installed to H cemented carbide housing) Shaft H Housing Min. Max. MLEF MLEF MLEF1 MLEF MLEF MLEF MLEF MLEF1 MLEF2 MLEF MLEF MLEF3 MLEF MLEF4 MLEF1 MLEF MLEF MLEF MLEF MLEF1 MLEF2 MLEF MLEF MLEF2 MLEF3 MLEF2 MLEF2 MLEF2 MLEF2 MLEF MLEF MLEF2 MLEF2 MLEF22 MLEF MLEF2 MLEF MLEF2 MLEF MLEF MLEF1 MLEF2 MLEF MLEF MLEF3 MLEF MLEF MLEF4 MLEF MLEF3 MLEF3 MLEF MLEF33 MLEF3 MLEF3 MLEF43 MLEF3 MLEF3 MLEF MLEF4 MLEF MLEF MLEF MLEF4 MLEF4 MLEF MLEF4 MLEF4 MLEF MLEF MLEF Dimensions to be measured at C / Unit in mm Knock-pin hole dia. mm P.C.D at knock-pin location mm Depth of recess in housing mm