PIC Design - RBC Bearings

More documents

Recommendations

Info

LINEAR MOTION SYSTEMSSTEPCALCULATION OF SYSTEM LOADINGAND BEARING SELECTIONLOAD CALCULATIONThe main factors involved in the selection of bearing material and size are the load on a single bearingand the total travel life required. The load on a single bearing varies with the position of the center ofgravity on the table top or carriage. To calculate the load on a single bearing:1. For system 3, use load calculation diagram 1 for vertical applications, and load calculationdiagram 2 for horizontal applications.2. For other frequently used system configurations, use load calculation diagram 3 for horizontalaxis, load calculation diagram 4 for vertical axis, and load calculation diagram 5 for vertical lateralaxes.LOAD CALCULATION DIAGRAMSDIAGRAM 1DIAGRAM 4DIAGRAM 2DIAGRAM 5DIAGRAM 3P = FORCE ON BEARINGSW = WEIGHT ON SYSTEM1-2Phone: 800-243-6125 ■ FAX: 203-758-8271E-Mail: sales@pic-design.comDESIGN®www.pic-design.comInteractive catalog ■ CAD ■ e-commerce
LINEAR MOTION SYSTEMSSTEPBEARING SELECTIONTwo types of bearings, self-aligning recirculatingball bearings and engineered plastic bearings, areavailable from PIC for use in linear motionsystems. Both types are available in inch ormetric sizes, and closed or open styles.SELF-ALIGNING BEARINGSThe formulas and tables listed below will enablethe designer to select the proper self-aligningbearings to meet the required life.Basic Dynamic Load Ratingand Life ExpectancyThe basic dynamic load rating of a selfaligningbearing is the load which allows arating life of 2,000,000 inches or 50,000meters of travel, without change in magnitudeor direction. The rating life of a bearing for aparticular application can be calculated fromthe following equations:For inch calculations,L=f h ●C 3 ● 2● 106f w PFor metric calculations,L(km) = fh C 3●●50f w PWith:L = rating life in inches for inch calculations,in kilometers for metric calculationsf h = hardness factor (1.0); shafts are60-65 HRCf w = load coefficient (refer to table 1)C = basic design load rating in pounds forinch calculations, in Newtons for metriccalculations (refer to table 2 or 3)P = force in pounds for inch calculations,force in Newtons for metric calculations,determined from load calculationdiagrams 1 through 5, as applicableRating life in hours can be calculated from thetravel distance per unit of time, as follows:L h =L2 L ● ●s n ●1 60With:L h = rating life in hoursL s = stroke length in inches forinch calculations, in meters formetric calculationsn 1 = rating in cycles per minuteTable 2. C Dynamic Load Rating of Inch BearingsTo calculate the basic dynamic load rating, useC=3.3/8 95 PFL-6 —L f● w ●.1/2 230 PFL-8 PFL0-8P2 ● 10 6 .5/8 400 PFL-10 PFL0-10f h .3/4 470 PFL-12 PFL0-12the following formulas:Shaft RatingPIC Part No.Diameter (inch) (lb) Closed OpenFor distances in inches,.1/4 60 PFL-4 —1. 850 PFL-16 PFL0-16For distances in kilometers,1.1/41.1/212301480PFL-20PFL-24PFL0-20PFL0-24C=3L f● w ●Table 3. C Dynamic Load Rating of Metric BearingsP1 ● 50 f hShaft Diameter Rating(mm) (Newtons)PIC Part No.Example of Calculations using standard PICcomponentsExpected Life: 20,000 hoursNumber Of Bearings: 4Weight On Carriage: 175 lbStroke Distance: 24 inchesTraveling Speed: 1000 in. / minCycle:2 x 24 inchesShaft:A10L seriesFrom the life expectancy in hours formula, thelife expectancy in traveling distance is:L h =L2 L s n ●1 60L=L h● 2 L ● s● n ●1 60L = 20,000 ● 2 ● 24 ● 1000●602 ● 24L = 1.20 x 10 9 inchesFrom the dynamic load rating formula:C=C=3C = 553 lbL●f w ●P2 ● 10 6 f h31.2●10 9 1.5●●1752 ● 10 6 1.0 4The assumption is that the 175 pound loadis distributed evenly between bearings;therefore, using diagram 3 with1-inch with 1-inch diameter bearings having a load capacityof 850 pounds is selected.Table 1. Load CoefficientOperating Conditionsf wOperation at low speed (50 ft/ min or15 m/ min or less) without impulsive 1 - 1.5shock from outsideOperation at intermediate speed(200 ft/min or 60 m/min or less) 1.5 - 2.0without impulsive shockOperation at high speed(over 200 ft/min or 60 m/min) 2.0 - 3.5with impulsive shock from outsideCLOSED TYPE12 650 MPFL-1216 800 MPFL-1620 1500 MPFL-2025 2500 MPFL-2530 3200 MPFL-3040 5550 MPFL-40OPEN TYPE12 750 MPFL0-1216 920 MPFL0-1620 1560 MPFLO-2025 2600 MPFLO-2530 3330 MPFL0-3040 5740 MPFL0-40ENGINEERED PLASTICLINEAR BEARINGSPIC self-lubricating plastic bearings aremaintenance free, run quietly, are not subjectto catastrophic failure, do not gall or brinellthe mating shaft, and can run on “soft” noncorrosive303 stainless steel shafting. Thesebearings are also capable of operation inhostile environments and are interchangeablewith PIC self-aligning, recirculating bearings.Bearing PV RatingThe performance capabilities of engineeredplastic linear bearings are defined by thePV rating of the bearings, where P is thepressure in pounds per square inch on theprojected bearing area, and V is thevelocity in feet per minute of the wearsurface. Maximum PV for continuousoperation is 7500 PSI/FPM. To calculatePV for a particular application, divide thetotal load in pounds on the bearing by theeffective area in square inches, andmultiply by the average bearing velocity infeet per minute.Example of Calculation:Number Of Bearings: 4Weight On Carriage: 175 lbLoad Per Bearing: 175/4 = 43.75 lbTraveling Speed: 1000 in./min or83.33 ft/minBearing Selected: PLC-16 (1 in. = ID,2.25 in. long = L)P= Load (lb.) 43.75= = 19.44 PSIID L 1 2.25● ●PV = 19.44 83.33 = 1620 PSI/FPM●www.pic-design.comInteractive catalog ■ CAD ■ e-commerceDESIGN®Phone: 800-243-6125 ■ FAX: 203-758-8271E-Mail: sales@pic-design.com1-3
Page 7 and 8: CATALOG SERIES INDEXIf a Part Numbe
Page 9: RDESIGNRECISIONNDUSTRIALOMPONENTSRL
Page 16 and 17: TECHNICAL SECTIONSystem 10 — Econ
Page 18 and 19: LINEAR MOTION SYSTEMS WITH INTEGRAL
Page 20 and 21: POSITIONING STAGESBall or Crossed R
Page 22 and 23: ROTARY TABLERatios 45:1, 90:1, 180:
Page 24 and 25: TECHNICAL SECTIONTypical coefficien
Page 26 and 27: BALL SLIDESCarriage Hole SpacingTot
Page 28 and 29: ALUMINUM CROSSED ROLLER SLIDESMeasu
Page 30 and 31: ECONOMY CROSSED ROLLER SLIDES.0001"
Page 32 and 33: BALL SLIDE GUIDESCompact Designh 1S
Page 34 and 35: X-XY-XYZ POSITIONERS WITH MICROMETE
Page 36 and 37: TECHNICAL SECTIONLead Screw Assembl
Page 38 and 39: TECHNICAL SECTIONAxial Take-Up Mech
Page 40 and 41: PZ STYLE LEAD SCREW NUTSFor Use Wit
Page 42 and 43: PV STYLE LEAD SCREW NUTSFor Use Wit
Page 44 and 45: ACME LEAD SCREW POWER NUTSInch and
Page 46 and 47: ANR STYLE ADJUSTABLE COMPLIANT NUTS
Page 48: BEARING HOUSING BLOCKSDiagram 1Mate
Page 58 and 59: TECHNICAL SECTIONWhatever your appl
Page 60 and 61:
PRE-DRILLED SHAFTSTYPE D Solid AISI
Page 62 and 63:
SHAFT SUPPORT BLOCKS / HANGERSClamp
Page 64 and 65:
RECIRCULATING BALL LINEAR BEARINGSI
Page 66 and 67:
SELF-ALIGNING BEARINGSInch and Metr
Page 68 and 69:
PIC CERAMIC COATED LINEAR BEARINGSL
Page 70 and 71:
METRIC LINEAR BEARING HOUSINGFor Cl
Page 72 and 73:
NOTES4-16Phone: 800-243-6125 ■ FA
Page 74 and 75:
TECHNICAL SECTIONApplication Inform
Page 76 and 77:
NO-SLIP SERIESPIC’s No-Slip and N
Page 78 and 79:
NO-SLIP POSITIVE DRIVE BELT - ULTRA
Page 80 and 81:
NO-SLIP POSITIVE DRIVE BELT32DP, .0
Page 82 and 83:
NO-SLIP POSITIVE DRIVE BELT24 DP .1
Page 84 and 85:
NO-SLIP POSITIVE DRIVE BELT.1475CP,
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
NO-SLIP POSITIVE DRIVE BELT “CHAI
Page 92 and 93:
NO-SLIDE TIMING BELTS40 DP (.0816 P
Page 94 and 95:
NO-SLIDE TIMING BELTS3 /8" Pitch, 1
Page 96 and 97:
E*P*S DRIVER SYSTEM SELECTION PROCE
Page 98 and 99:
E*P*S TIMING BELTS.080 Pitch, 1 /8"
Page 100 and 101:
E*P*S TIMING BELTS40 D.P. (.0816 Pi
Page 102 and 103:
E*P*S TIMING BELTS1 /5" (.200) Pitc
Page 104 and 105:
E*P*S TIMING PULLEYS1 /5" (.200) Pi
Page 106 and 107:
E*P*S HTD ® TIMING BELTS3mm HTD ®
Page 108 and 109:
E*P*S HTD ® TIMING BELTS5mm HTD ®
Page 110 and 111:
ROUND BELTS AND PRECISION GROOVED P
Page 112 and 113:
ROUND BELTS AND PRECISION GROOVED P
Page 114 and 115:
.1475 PITCH MINIATURE PITCH SPROCKE
Page 116 and 117:
TECHNICAL SECTIONTo help customers
Page 118 and 119:
PRECISION BALL BEARINGSABEC 1,3, An
Page 120 and 121:
SINTERED BRONZE BEARINGSSleeve & Fl
Page 122 and 123:
NON-METALLIC BEARINGSSleeve & Flang
Page 124 and 125:
NON-CORROSIVE BALL BEARINGSInch & M
Page 126 and 127:
ROD ENDSNylon & Phosphor Bronze Rac
Page 128 and 129:
BEARING HOUSING — 3 /8" , 1 /2" a
Page 130 and 131:
OUTER RACE SHIM SPACERSMaterial:300
Page 132 and 133:
LAMINATED BRASS SHIM SPACERSPRECISI
Page 134 and 135:
ADJUSTABLE HUB CLAMPRef.Gear Bore*N
Page 136:
PRECISION GROUND SHAFTING — 1 /32
Page 139 and 140:
PRECISION CASE HARDENED & GROUND SH
Page 141 and 142:
RDESIGNRECISIONNDUSTRIALOMPONENTSRC
Page 143 and 144:
FLANGE MOUNTED-POWER OFF BRAKES24 V
Page 145 and 146:
SLIP CLUTCHES — CONTINUOUS SLIP O
Page 147 and 148:
ROLLER CLUTCHES■ Ideal for indexi
Page 149 and 150:
BELLOWS COUPLINGS.12 to 3 /8" Bore
Page 151 and 152:
MULTI-JAW COUPLINGS — 64 PITCH1 /
Page 153 and 154:
FLEXIBLE-ZERO BACKLASH COUPLING1 /8
Page 155 and 156:
PRECISION UNIVERSAL JOINTS1 /8", 3
Page 157 and 158:
DESIGNRPRECISION HARDWARERRECISIONN
Page 159 and 160:
SOCKET HEAD SHOULDER SCREWS303 & Ha
Page 161 and 162:
“SILVER-GRIP” SET SCREWSInch an
Page 163 and 164:
SET SCREWS — CUP POINTConforming
Page 165 and 166:
PRECISION WASHERSMachinedC ±.006 A
Page 167 and 168:
METRIC RETAINING RINGSAll Dimension
Page 169 and 170:
PRECISION SYNCHRO MOUNTING CLAMPSTa
Page 171 and 172:
METRIC PRECISION DOWEL PINS — PRE
Page 173 and 174:
KNURLED THUMB SCREWS#4-40 To 1 /4-2
Page 175 and 176:
STAINLESS PRECISION SPRINGSCompress
Page 177 and 178:
HANDLES — CHASSIS5/16min.Material
Page 179 and 180:
PRECISION ENGRAVED DRUM DIALSClockw
Page 181 and 182:
PRECISION HAND CRANKS.1248.1873.249
Page 183 and 184:
RDESIGNRECISIONNDUSTRIALOMPONENTSRM
Page 185 and 186:
TECHNICAL SECTIONStructural Design
Page 187 and 188:
MOUNTING COMPONENTSConnecting Angle
Page 189 and 190:
MOUNTING COMPONENTSAdjustable Joint
Page 191 and 192:
FASTENING HARDWAREFasteners / T-Slo
Page 193 and 194:
ACCESSORIESStandard & [MiniatureT-S
Page 195 and 196:
RDESIGNRECISIONNDUSTRIALOMPONENTSRE
Page 197 and 198:
PRECISION BREADBOARD KITSPRECISION
Page 199 and 200:
DESIGNRSPEED REDUCER & GEAR HEADSRR
Page 201 and 202:
PRECISION GEAR HEADS1 1 /16 " Dia.
Page 203 and 204:
HELICAL GEAR ASSEMBLIES — 48 PITC
Page 205 and 206:
GENEVA MECHANISMSIntermittent Motio
Page 207 and 208:
RDESIGNRECISIONNDUSTRIALOMPONENTSRG
Page 209 and 210:
TECHNICAL SECTIONTable of Pitch Dia
Page 211 and 212:
SPUR GEAR-16 PITCH — 3 /16" Face
Page 213 and 214:
SPUR GEAR-24 PITCH — 1 /8" Face W
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Page 231 and 232:
SPUR GEAR-96 PITCH — 1 /16", 3 /3
Page 233 and 234:
SPUR GEAR-120 PITCH — 1 /16", 3 /
Page 235 and 236:
FINE PITCH RACK DATA — 24 to 120
Page 237 and 238:
DELRIN ® SPUR GEAR-24 PITCH — 3
Page 239 and 240:
DELRIN ® SPUR GEAR-48 PITCH — 3
Page 241 and 242:
PRECISION CLUSTER GEARSAGMA 10CLUST
Page 243 and 244:
ANTI-BACKLASH GEAR-24 PITCH — 3 /
Page 245 and 246:
ANTI-BACKLASH GEAR-48 PITCH — .10
Page 247 and 248:
Page 249 and 250:
Page 251 and 252:
HELICAL GEAR-48 NORMAL PITCH 3 /16"
Page 253 and 254:
ANTI-BACKLASH WORM WHEEL- 48 PITCHS
Page 255 and 256:
ANTI-BACKLASH WORM WHEEL- 64 PITCH1
Page 257 and 258:
MITER & BEVEL GEARS- 72 PITCH — 2
Page 259 and 260:
GEAR BLANKS — NO TEETHPin Hub —
Page 261 and 262:
SPUR GEARS — 0.3 Module ■3.18mm
Page 263 and 264:
SPUR GEARS — 0.4 Module ■3.18 a
Page 265 and 266:
Page 267 and 268:
Page 269 and 270:
Page 271 and 272:
SPUR GEARS — 0.8 Module ■9.52 F
Page 273 and 274:
GEAR & DIAL HUB-PIN TYPE — 1 /8",
Page 275 and 276:
RDESIGNRECISIONNDUSTRIALOMPONENTSRT
Page 277 and 278:
TECHNICAL SECTIONSECTION 2. Basic G
Page 279 and 280:
TECHNICAL SECTIONSECTION 2. Basic G
Page 281 and 282:
TECHNICAL SECTIONSECTION 3. Backlas
Page 283 and 284:
TECHNICAL SECTIONSECTION 5. Toleran
Page 285 and 286:
TECHNICAL SECTIONSECTION 7. Equival
Page 287 and 288:
ALPHABETICAL INDEXPRODUCT DESCRIPTI
Page 289 and 290:
ALPHABETICAL INDEXPRODUCT DESCRIPTI
show all

PIC Design - RBC Bearings

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?