Per­fect bear­ings for food man­u­fac­tur­ers

DEMM Engineering & Manufacturing - - FOOD INDUSTRY - For more in­for­ma­tion con­tact: skf.co.nz

Food and bev­er­age pro­duc­ers must take an un­com­pro­mis­ing ap­proach to hy­giene, health and safety. They need ma­chine so­lu­tions that can match these ex­pec­ta­tions and at the same time sup­port lower op­er­at­ing costs through re­duc­ing the need for main­te­nance. SKF’s food line Y-bear­ing units have been de­signed to do just that.

Food and bev­er­age pro­cess­ing is a par­tic­u­larly chal­leng­ing area for ma­chin­ery sup­pli­ers. Pro­duc­tion ar­eas can be hot, cold or hu­mid, or they can be chem­i­cally ag­gres­sive be­cause of the na­ture of the food or the con­se­quence of strict clean­ing regimes. What­ever the food or bev­er­age in­dus­try, ma­chin­ery is of­ten ex­posed to fre­quent high-pres­sure wash down with caus­tic an­tibac­te­rial cleans­ing agents.

SKF Y-bear­ings for the food in­dus­try are hy­gien­i­cally de­signed, sealed and lu­bri­cated for life with NSF-ap­proved SKF food-grade grease and of­fer main­te­nance-free op­er­a­tion. The SKF Y-bear­ing com­pos­ite hous­ings are made of a ther­mo­plas­tic com­pos­ite with steel coils em­bed­ded in the hous­ing. These give the hous­ing a ra­dial break­ing load far greater than the static load rat­ing of the bear­ing, and pos­si­bly the high­est frac­ture strength of any com­pos­ite unit avail­able.

A f lat base en­ables the unit to meet f lush with its mount­ing sur­face, elim­i­nat­ing gaps which oth­er­wise are po­ten­tial ar­eas for bac­te­ria to har­bour and grow, while stain­less steel bolt hole in­serts pro­vide added strength to each hous­ing foot.

Hous­ings and bear­ings are re­sis­tant to the ma­jor­ity of com­mon wash down so­lu­tions and re­quire no re­lu­bri­ca­tion, even in a wash down en­vi­ron­ment, thus sav­ing time and money while pro­vid­ing a cleaner-run­ning bear­ing unit.

To com­ply with health and safety reg­u­la­tions, the com­pos­ite and stain­less steel housed Y-bear­ing units can be sup­plied with ef­fec­tive end cov­ers. Closed end cov­ers are tested to with­stand a 10MPa (100 bar) pres­sure wash for com­plete se­cu­rity and op­er­a­tor safety. An op­tional drain hole is part of the end cover de­sign.

SKF 2RF bear­ing seals pro­vide an in­no­va­tive, ef­fec­tive, proven multi­bar­rier de­sign that pre­vents con­tam­i­na­tion and re­tains lu­bri­ca­tion. Dur­ing high­pres­sure wash downs, 2RF seals keep wa­ter and de­ter­gents out of seal con­tact ar­eas mak­ing the Y-bear­ing unit range main­te­nance-free.

The SKF Y-bear­ing is fac­tory lu­bri­cated for life with an NSF ap­proved SKF food-grade grease. This high-qual­ity syn­thetic grease is odour­less and taste­less, leav­ing foods un­af­fected. It re­sists washouts even dur­ing fre­quent high-pres­sure wash downs with hot or cold wa­ter con­tain­ing dis­in­fec­tant so­lu­tions. This grease can be used in ap­pli­ca­tions where op­er­at­ing tem­per­a­tures range from –15 °C to +120 °C.

The most sus­tain­able as­pect of the SKF Y-bear­ing units is cen­tred on the abil­ity of these units to per­form in a wet, abra­sive or wash down en­vi­ron­ment without re­quir­ing any re­lu­bri­ca­tion for the life of the bear­ing unit.

The com­mon prac­tice in wash down en­vi­ron­ments of re­lu­bri­cat­ing bear­ing units fre­quently (of­ten daily) is deemed nec­es­sary to purge wa­ter and con­tam­i­nants. Since SKF Y-bear­ing units re­quire no re-greas­ing, they do not dis­charge used grease from the seals. This elim­i­nates a ma­jor source of waste­water con­tam­i­na­tion, re­sult­ing in a cleaner plant en­vi­ron­ment and lower dis­posal costs for users.

For ex­am­ple, if 20g of lu­bri­cant is used per bear­ing purge dur­ing each weekly main­te­nance cy­cle that adds up to 1kg per bear­ing per year. Mul­ti­ply that by the num­ber of bear­ings in a par­tic­u­lar ap­pli­ca­tion, and you can see that the re­sults sig­nif­i­cant in terms of the cost of lu­bri­cant, staff time and dis­posal.

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