Triple-Sealed Bearings for Bearing Units

Transcription

1 Fo New Technology Netwok copoation R Tiple-Sealed eaings fo eaing Units

2 NTN Tiple-Sealed eaings fo eaing Units These eliable tiple-sealed beaings ae dustpoof and watepoof. They ensue a longe beaing life even when exposed to heavy aibone dust and splashes of foul wate. Featues ette dustpoofing and watepoofing ensue a longe beaing life. ed beaings featue a secue beaing seal with thee lips. This special seal offes eliable dustpoofing and watepoofing supeio to those of standad beaings used in beaing units. In addition, it ensues a longe sevice life, even when exposed to heavy aibone dust and splashes of foul wate. (Patent pending) Reduces maintenance cost. A beaing life longe than that of a standad beaing unit configuations means extended maintenance intevals, geatly educed maintenance costs (of inspection, elubication, eplacement, etc.), and inceased availability of machiney. Deceases pice of the beaing unit and contibutes to moe compact machiney. The tiple-sealed beaing unit eplaces conventional coveed beaing units in cetain opeating conditions, geatly deceasing the cost of beaing units. In addition, if the cove is not equied, the machiney can be made moe compact. Secue balled setscew The tiple-sealed beaing is mounted on the shaft with NTN s unique balled setscew, which featues an embedded ball in its tip. ompaed with knuled cup point o cup-point setscews, the balled setscew povides much geate esistance to loosening, as it does not eadily loosen due to vibation o impact. Intechangeability The tiple-sealed beaing unit confoms to the JIS (Japanese Industial Standad) fo U-type beaings. It is not only eady to use as a elubicable beaing, but it also eplaces the conventional beaing units of NTN and othe manufactues. It theefoe seves as a eady eplacement fo existing beaing units. 1

3 Dustpoofing effectiveness (1) Dustpoofing pefomance test An houglass-shaped dum containing dust (activated alumina) was otated at 50 pm. The main shaft was then otated at 1,750 pm (dn value 51,000), while a load of 25 kgf was applied to the test beaings mounted on both sides of the dum. NTN ecoded the beaings' nomal unning time befoe seizue due to intenal dust contamination, and compaed the esults. (ecause the test was pefomed at oom tempeatue, the speed of the main shaft was set to a much highe ange than nomally allowable fo tiple-sealed beaings in ode to simulate moe sevee opeating conditions.) Dum impelle Test beaing Dum diving belt Test bed Main shaft diving belt Reduce Dustpoofing pefomance test ig (2) Dustpoofing test esults Seal type Manufactue Test beaing desciption oss-section of beaing No. of samples Aveage unning time NTN U206D1LLJ 3 A U206D1LLJ h 1959h Odinay seal (ubbe seal + flinge) NTN U206D h Note The dustpoofing life of ou tiple-sealed beaing (U206D1LLJ) is 2.8 times that of an equivalent beaing fom A, and is 5.6 times that of ou conventional beaing with a standad seal (U206D1). Resistance to muddy wate (1) Muddy wate esistance test Two hunded cubic centimetes of muddy wate (Kanto loam type 8; wate content 1:10 w/w) was poued into a cylindical housing whee the beaing being tested was installed. The beaing and popelle in font of the beaing wee otated at 500 pm (dn value 20,000) by a dive belt, with a vibation of 0.6 G applied to the housing. NTN ecoded the unning time of the beaing befoe the test equipment seized due to contamination by muddy wate, and then compaed the esults. Dive pulley Main shaft Test beaing Housing Popelle Muddy wate esistance test ig Muddy wate (2) Muddy wate esistance test esults and tightening toques Seal type Manufactue Desciption of test beaing oss-section of beaing Aveage unning time Tightening toque NTN U208D1LLJ 3016h (n=2) 16.9N-cm 1.50lbf-inch. (n=5) A U208D1LLJ UEL208D1LLJ 51h 1437h 18.8N-cm 1.66lbf-inch. (n=5) 23.5N-cm 2.08lbf-inch. UEL208D1LLJ 774h 58.8N-cm 5.20lbf-inch. NTN U208D1 513h 4.4N-cm 0.39lbf-inch. (n=5) Odinay seal (ubbe seal + flinge) D U208D1 287h 26.3N-cm 2.32lbf-inch. E AEL208D1 40h 14.7N-cm 1.30lbf-inch. Note The life of the muddy watepoofing of ou tiple-sealed beaing (U208D1LLJ) is 59 times that of an equivalent beaing fom A, twice that of an equivalent beaing fom, and 5.9 times that of ou conventional beaing with a standad seal (U208D1). 2

4 onstuction Tiple seal alled setscew Fo easy mounting of the beaing on the shaft. Tightens secuely and does not eadily loosen. Oute ing all Sealing device The ubbe seal extends to the oute cicumfeence the shielded plate fo bette sealing pefomance, and pevents contamination of the beaing by dust o foul wate. Sealed plate Galvanized steel plate constuction ensues impoved coosion esistance. Optimal design contibutes to enhanced pessue esistance. ed beaing Inne ing Tiple-lip Povides excellent dustpoofing and watepoofing, thus potecting against contamination by dust o foul wate. Allowable Opeating Tempeatue Range and Speed The tiple-sealed beaing can be used in a tempeatue ange of -15 to 100. Allowable dn value: 36,000 [dn=beaing boe diamete d (mm) x opeating speed n (pm)] Typical Applications ed beaing units ae suitable fo machiney used in locations subjected to splashes of foul wate and heavy dust, including machiney used in steel-making, casting, gabage disposal, watewoks and sewage teatment, ca washes, laundy washing, food pocessing, fish pocessing, constuction, tanspotation, agicultue, textiles, and dyeing. Sample application : A pillow unit (ight) and a squae flange unit (left) ae used in a conveyo unit opeating in an envionment with heavy aibone dust. Special Specifications The standad pelubication fo beaings in this seies is Li-mineal gease. ontact NTN Engineeing fo optional beaings lubicated with Solid Gease (heat-solidified gease) o food-gade gease, o fo beaings made of stainless steel. 3

5 ed ball beaings fo beaing unit Type U2...LLJ ylindical boe with setscew G ds F d4 d S D S1 S Shaft eaing 1 Nominal dimensions basic load atings mass dia. numbe N lbf mm inch. mm d D s 2 dynamic static kg lb S S1 G ds d4 F o inch. min. 12 U201D1LLJ M !/2 U D1LLJ No.10-32UNF U202D1LLJ M (/16 U D1LLJ No.10-32UNF %/8 U D1LLJ U203D1LLJ M !!/16 U D1LLJ No.10-32UNF U204D1LLJ M #/4 U D1LLJ No.10-32UNF U205D1LLJ M !#/16 U D1LLJ &/8 U D1LLJ No.10-32UNF !%/16 U D1LLJ U D1LLJ U206D1LLJ M !/16 U D1LLJ !/8 U D1LLJ !/4-28UNF #/16 U D1LLJ !/4 U D1LLJ U207D1LLJ M !/4 U D1LLJ %/16 U D1LLJ !/4-28UNF #/8 U D1LLJ &/16 U D1LLJ U208D1LLJ M !/2 U D1LLJ %/16-24UNF (/16 U D1LLJ U209D1LLJ M %/8 U D1LLJ !!/16 U D1LLJ %/16-24UNF #/4 U D1LLJ U210D1LLJ M !#/16 U D1LLJ &/8 U D1LLJ %/16-24UNF !%/16 U D1LLJ U D1LLJ These numbes indicate elubicatable type. If maintenance fee type is needed, please ode without suffix "D1". 2 Minimum allowable dimension fo chamfe dimension. Note: 1) Fo shaft toleances, see the eaing Units catalog. 2) The pecision of ball beaings is as specified in JIS 1558 all beaings fo olling beaing units. 3) ontact NTN Engineeing fo infomation on tapeed boe ball beaings o ball beaings with boes in English measuements. 4

6 ed ball beaings fo beaing unit Type U2...LLJ ylindical boe with setscew G ds F d4 d S D S1 S Shaft eaing 1 Nominal dimensions basic load atings mass dia. numbe N lbf mm inch. mm d D s 2 dynamic static kg lb S S1 G ds d4 F o inch. min. 55 U211D1LLJ M U D1LLJ !/16 U D1LLJ %/16-24UNF !/8 U D1LLJ #/16 U D1LLJ U212D1LLJ M !/4 U D1LLJ %/16 U D1LLJ #/8-24UNF #/8 U D1LLJ &/16 U D1LLJ U213D1LLJ M !/2 U D1LLJ #/8-24UNF (/16 U D1LLJ U214D1LLJ M %/8 U D1LLJ !!/16 U D1LLJ #/8-24UNF #/4 U D1LLJ U215D1LLJ M !#/16 U D1LLJ &/8 U D1LLJ #/8-24UNF !%/16 U D1LLJ U D1LLJ U216D1LLJ M !/16 U D1LLJ !/8 U D1LLJ #/8-24UNF #/16 U D1LLJ U217D1LLJ M !/4 U D1LLJ %/16 U D1LLJ !/2-20UNF &/16 U D1LLJ U218D1LLJ M !/2 U D1LLJ !/2-20UNF These numbes indicate elubicatable type. If maintenance fee type is needed, please ode without suffix "D1". 2 Minimum allowable dimension fo chamfe dimension. Note: 1) Fo shaft toleances, see the eaing Units catalog. 2) The pecision of ball beaings is as specified in JIS 1558 all beaings fo olling beaing units. 3) ontact NTN Engineeing fo infomation on tapeed boe ball beaings o ball beaings with boes in English measuements. 5

7 ed ball beaings fo beaing unit Type REL2...LLJ ylindical boe with eccentic locking colla G 5 ds F S D d3 d S1 1 S Shaft eaing 1 Nominal dimensions basic load atings mass dia. numbe N lbf mm inch. dynamic static kg lb mm d D 1 s 2 S S1 G ds d3 5 F o inch min. 20 REL204D1LLJ M #/4 REL D1LLJ !/4-28UNF REL205D1LLJ M !#/16 REL D1LLJ &/8 REL D1LLJ !/4-28UNF !%/16 REL D1LLJ REL D1LLJ REL206D1LLJ M !/16 REL D1LLJ !/8 REL D1LLJ %/16-24UNF #/16 REL D1LLJ !/4 REL D1LLJ REL207D1LLJ M !/4 REL D1LLJ %/16 REL D1LLJ #/8-24UNF #/8 REL D1LLJ &/16 REL D1LLJ REL208D1LLJ M !/2 REL D1LLJ #/8-24UNF (/16 REL D1LLJ REL209D1LLJ M %/8 REL D1LLJ !!/16 REL D1LLJ #/8-24UNF #/4 REL D1LLJ REL210D1LLJ M !!/16 REL D1LLJ &/8 REL D1LLJ #/8-24UNF !%/16 REL D1LLJ REL D1LLJ REL211D1LLJ M REL D1LLJ !/16 REL D1LLJ #/8-24UNF !/8 REL D1LLJ #/16 REL D1LLJ REL212D1LLJ M !/4 REL D1LLJ %/16 REL D1LLJ #/8-24UNF #/8 REL D1LLJ &/16 REL D1LLJ REL213D1LLJ M !/2 REL D1LLJ #/8-24UNF (/16 REL D1LLJ REL214D1LLJ M %/8 REL D1LLJ !!/16 REL D1LLJ #/8-24UNF #/4 REL D1LLJ REL215D1LLJ M !#/16 REL D1LLJ &/8 REL D1LLJ #/8-24UNF !%/16 REL D1LLJ REL D1LLJ These numbes indicate elubicatable type. If maintenance fee type is needed, please ode without suffix "D1". 2 Minimum allowable dimension fo chamfe dimension. Note: 1) Fo shaft toleances, see eaing Units catalog. 2)UEL seies (UEL204 UEL215)ae also available with eccentic locking collas. 6