Hy­draulic bear­ing push­ers op­ti­mise plant main­te­nance tasks

DEMM Engineering & Manufacturing - - HYDRAULICS & PNEUMATICS -

When ser­vic­ing large ma­chin­ery, the im­por­tance of cor­rect bear­ing in­stal­la­tion is para­mount. Ac­cord­ing to bear­ing man­u­fac­tur­ers, in­cor­rect in­stal­la­tion is di­rectly the cause of 16 per­cent of all fail­ures.

The use of hy­draulic bear­ing push­ers pro­vides a pre­cise, safe and time-sav­ing method of re­mov­ing and re­plac­ing bear­ings in plants wide­spread in the min­ing and energy, ma­te­ri­als han­dling and ports fa­cil­i­ties, oil and gas and man­u­fac­tur­ing and pri­mary pro­cess­ing sec­tors.

Tech­no­fast’s new Ez­iTite bear­ing push­ers – in stock sizes from M60 to M400 and with ca­pac­i­ties from 230kN to 1800kN – of­fer an ideal means of mount­ing or dis­mount­ing rolling el­e­ment bear­ings and other com­po­nents which are widely em­ployed in ma­chin­ery such as con­veyor drives, crush­ers, ball mills, milling and rolling equip­ment, gear­boxes, tur­bines, drilling equip­ment, and pumps, fans, blow­ers and marine ap­pli­ca­tions.

Rather than re­ly­ing on heat or oil in­jec­tion pro­cesses, the Ez­iTite Bear­ing Pusher uses high-pres­sure hy­draulic oil (typ­i­cally at 700 bar) to pre­cisely drive the bear­ing onto the shaft’s bear­ing seat.

Use of the Ez­iTite Bear­ing Pusher is sim­ple, with the assem­bly screwed into place and en­er­gised with a suit­able pres­sure pump. The in­ter­nal pres­sure acts upon an an­nu­lar pis­ton to press against the bear­ing’s in­ner race, driv­ing the bear­ing onto the shaft.

Once the bear­ing has been driven into place, the pres­sure is re­leased and the Bear­ing Pusher is then re­moved. A stan­dard lock­ing nut and washer are then used to pre­vent the bear­ing from mov­ing from its seat dur­ing op­er­a­tion and main­tain cor­rect op­er­at­ing preload.

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