PIC Design - RBC Bearings

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TECHNICAL SECTIONTo help customers select the most appropriate bearings for use in particularapplications, PIC Design has included an Application Guide and an ABEC andISO Tolerancing Chart.The Application Guide assists in determining the bearing quality necessary foryour system. If you do not find your specific applications listed, use ones whichare most similar.Table 1. Application GuideABEC GradeApplication 1 3 5 7Electric Motors✔Tape Guides✔Gyro Gimbals✔Commercial Gear Trains ✔ ✔Precision Gear Trains ✔ ✔AGMA Q14 Gear Trains✔Very High Speed Applications✔Timing Pulley Supports ✔ ✔“No-Slip” Pulley Systems ✔ ✔Chain Drive Systems✔Bread Board Experiments✔Computer Disk Drive✔Laser Aligning Equipment ✔ ✔Hand Adjusted Settings✔Robotics ✔ ✔Encoder Applications ✔ ✔Office Equipment ✔ ✔Print Heads ✔ ✔Table 2. ABEC & ISO Tolerancing ChartMean DiameterRadial RunoutToleranceABEC Inner Outer ISOBore O.D. O.D. SizeGrade Ring RingClass1 .0003 .00053 .0003 .00045 .00015 .00026-2+.0000 +.00000-18 mm0-.0003 -.0003 (Normal)+.0000 +.0000-.0002 -.0003+.0000 +.0000-.0002 -.00020-30 mm 60-30 mm 57 .0001 .00015+.0000 +.00000-30 mm 4-.0002 -.0002This information is intended for reference only. All dimensions are in inches.BEARING SELECTION:Bearing SizeA variety of criteria may have an influence on bearing size selection for differentinstallations:Mating parts. One or more of the bearing dimensions may be governed by thesize of a mating part (e.g. shaft, housing).Capacity. Bearing loading, dynamic and static, will establish minimum capacityrequirements and influence size selection because capacity generally increaseswith size.Speedability. Smaller bearings can usually operate at higher speeds than largebearings, hence the speed requirement of an application may affect sizeselection.Stiffness. Large bearings yield less than small bearings and are the betterchoice where bearing stiffness is crucial.Weight. In some cases, bearing weight may have to be considered and factoredinto the selection process.Phone: 800-243-6125 ■ FAX: 203-758-8271E-Mail: sales@pic-design.comTorque. Reducing the ball size and using wider raceway curvatures are tacticswhich may be used to reduce torque.AISI 440 stainless steel is the standard material for miniature and instrumentbearings and torque tube bearings. It is optional for spindle and turbinebearings. This is a hardenable, corrosion-resistant steel with adequate fatigueresistance, good load-carrying capacity, excellent stability and wear resistance.Operating temperature range is -400 o F to 300 o F for miniature and instrumentbearings.SAE 52100 chrome steel is the standard material for spindle and turbinebearings. It is also available in many miniature and instrument sizes, and maybe preferable when fatigue life and static capacity are critical. This material hasexcellent capacity, fatigue resistance and stability. Operating temperature limitis 400 o F when used in spindle and turbine bearings.Preloading TechniquesPreloading is the removal of internal clearance in a bearing by applying apermanent thrust load to it. Preloading is used to:● Eliminate radial and axial play● Increase system rigidity● Reduce nonrepetitive runout● Lessen the difference in contact angles between the balls and both inner andouter rings at very high speeds● Prevent ball skidding under very high accelerations● Suppress noiseBearings should be preloaded as lightly as is necessary to achieve the desiredresults. This avoids excessive heat generation, which reduces speed capabilityand bearing life.There are three basic methods of preloading — springs, axial adjustment andduplex bearings.Limiting SpeedsLimiting speed is defined as the speed at which the internally generatedtemperature in a mounted bearing reaches the lowest maximum temperaturepermissible for any of its components, including the lubricant.There are many factors which combine to determine the limiting speeds of balland roller bearings. Therefore it is not possible to calculate these speeds withaccuracy. Frequently it is necessary to estimate the speed limit of a bearing onthe basis of experience with bearings operating under conditions similar tothose in question. For small and medium size bearings of the same type anddimension series, operating under similar conditions, the speed limit is approximatelyinversely proportional to the bearing bore. For large bearings this nolonger applies as their speed limits are relatively lower. A bearing of light sectionhas a higher speed limit than a bearing of heavy section. As a result a moregeneral comparison can be made between speeds of different radial bearings byusing the bearing mean diameter dm as a reference instead of the bore d. Fromthe above, the following formulas are derived:For Radial and Angular Contact Bearings. N= Ad mWhere: N = The speed Limit, RPMd + Ddm = The Bearing, mean diameter =2d = The bearing bore in mmD = The bearing O.D., mmA = A value Single Row Ball: 400,000Single Row Angular Contact:Low Contact Angle: 800,000High Contact Angle: 500,000The above values for A are useful as a quick orientation regarding speed limitsfor different bearing types and sizes operating under a moderate load andotherwise favorable conditions.The speed limits calculated using these formulas and values of A should beconsidered a maximum. These values apply only to bearings lubricated with oil.When bearings are lubricated with grease, use 70% of the above for A.DESIGN®www.pic-design.comInteractive catalog ■ CAD ■ e-commerce
EXTENDED INNER RACE BEARINGSTOLERANCES: ABEC 3 & 7Material: 440 Stainless SteelLubrication: Open - Oil per MIL-L-6085Double Shielded: Grease per MIL-G-23827ABEC ABECShield 3 7BORE O.D. H W DATA Part No. Part No..1250 .2500.1875 .3125.0937 .125 Open E1-OE-3 E1-OE-7.1094 .1406DoubleShieldE1-SE-3E1-SE-7.1094 .1406 Open E2-OE-3 E2-OE-7.125 .1562.2500 .3750 .125 .1562.3125 .5000 .1562 .1875DoubleShieldE2-SE-3E2-SE-7Open E3-OE-3 E3-OE-7DoubleShieldE3-SE-3 E3-SE-7Open E4-OE-3 E4-OE-7DoubleShieldE4-SE-3 E4-SE-7TAPERED O.D. BEARINGSTOLERANCES: ABEC 7Material: 440 Stainless SteelLubricated: Grease Per MIL-G-23827Supplied With Double ShieldBore O.D. W 1 W 2 A E Part No..1250 .3757 .189 .163 .4380 .037 E8-1.1875 .5632 .251 .226 .6250 .042 E8-2.2498 .6257 .251 .226 .6850 .042 E8-3.3125 .6887 .251 .226 .7500 .042 E8-4EXTRA THIN BALL BEARINGSTOLERANCES: ABEC-5OPENMaterial:440 Stainless SteelOil Per MIL-L-6085Load RatingBore O.D. W RDyn. StaticPart No..3750 .6250 .1562 .010 96 53 E5-1.5000 .7500 .1562 .010 112 67 E5-2.6250 .8750 .1562 .010 116 81 E5-3.7500 1.0000 .1562 .010 129 98 E5-4www.pic-design.comInteractive catalog ■ CAD ■ e-commerceDESIGN®Phone: 800-243-6125 ■ FAX: 203-758-8271E-Mail: sales@pic-design.com6-3
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CATALOG SERIES INDEXIf a Part Numbe
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RDESIGNRECISIONNDUSTRIALOMPONENTSRL
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LINEAR MOTION SYSTEMSSTEPBEARING SE
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TECHNICAL SECTIONSystem 10 — Econ
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LINEAR MOTION SYSTEMS WITH INTEGRAL
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POSITIONING STAGESBall or Crossed R
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ROTARY TABLERatios 45:1, 90:1, 180:
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TECHNICAL SECTIONTypical coefficien
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BALL SLIDESCarriage Hole SpacingTot
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ALUMINUM CROSSED ROLLER SLIDESMeasu
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ECONOMY CROSSED ROLLER SLIDES.0001"
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BALL SLIDE GUIDESCompact Designh 1S
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X-XY-XYZ POSITIONERS WITH MICROMETE
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TECHNICAL SECTIONLead Screw Assembl
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TECHNICAL SECTIONAxial Take-Up Mech
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PZ STYLE LEAD SCREW NUTSFor Use Wit
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PV STYLE LEAD SCREW NUTSFor Use Wit
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ACME LEAD SCREW POWER NUTSInch and
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ANR STYLE ADJUSTABLE COMPLIANT NUTS
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BEARING HOUSING BLOCKSDiagram 1Mate
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TECHNICAL SECTIONWhatever your appl
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PRE-DRILLED SHAFTSTYPE D Solid AISI
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SHAFT SUPPORT BLOCKS / HANGERSClamp
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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 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 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
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METRIC RETAINING RINGSAll Dimension
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PRECISION SYNCHRO MOUNTING CLAMPSTa
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METRIC PRECISION DOWEL PINS — PRE
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KNURLED THUMB SCREWS#4-40 To 1 /4-2
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STAINLESS PRECISION SPRINGSCompress
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HANDLES — CHASSIS5/16min.Material
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PRECISION ENGRAVED DRUM DIALSClockw
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PRECISION HAND CRANKS.1248.1873.249
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RDESIGNRECISIONNDUSTRIALOMPONENTSRM
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TECHNICAL SECTIONStructural Design
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MOUNTING COMPONENTSConnecting Angle
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MOUNTING COMPONENTSAdjustable Joint
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FASTENING HARDWAREFasteners / T-Slo
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ACCESSORIESStandard & [MiniatureT-S
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RDESIGNRECISIONNDUSTRIALOMPONENTSRE
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PRECISION BREADBOARD KITSPRECISION
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DESIGNRSPEED REDUCER & GEAR HEADSRR
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PRECISION GEAR HEADS1 1 /16 " Dia.
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HELICAL GEAR ASSEMBLIES — 48 PITC
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GENEVA MECHANISMSIntermittent Motio
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RDESIGNRECISIONNDUSTRIALOMPONENTSRG
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TECHNICAL SECTIONTable of Pitch Dia
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SPUR GEAR-16 PITCH — 3 /16" Face
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SPUR GEAR-24 PITCH — 1 /8" Face W
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SPUR GEAR-96 PITCH — 1 /16", 3 /3
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SPUR GEAR-120 PITCH — 1 /16", 3 /
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FINE PITCH RACK DATA — 24 to 120
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DELRIN ® SPUR GEAR-24 PITCH — 3
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DELRIN ® SPUR GEAR-48 PITCH — 3
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PRECISION CLUSTER GEARSAGMA 10CLUST
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ANTI-BACKLASH GEAR-24 PITCH — 3 /
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ANTI-BACKLASH GEAR-48 PITCH — .10
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HELICAL GEAR-48 NORMAL PITCH 3 /16"
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ANTI-BACKLASH WORM WHEEL- 48 PITCHS
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ANTI-BACKLASH WORM WHEEL- 64 PITCH1
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MITER & BEVEL GEARS- 72 PITCH — 2
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GEAR BLANKS — NO TEETHPin Hub —
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SPUR GEARS — 0.3 Module ■3.18mm
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SPUR GEARS — 0.4 Module ■3.18 a
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SPUR GEARS — 0.8 Module ■9.52 F
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GEAR & DIAL HUB-PIN TYPE — 1 /8",
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RDESIGNRECISIONNDUSTRIALOMPONENTSRT
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TECHNICAL SECTIONSECTION 2. Basic G
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TECHNICAL SECTIONSECTION 2. Basic G
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TECHNICAL SECTIONSECTION 3. Backlas
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TECHNICAL SECTIONSECTION 5. Toleran
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TECHNICAL SECTIONSECTION 7. Equival
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ALPHABETICAL INDEXPRODUCT DESCRIPTI
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ALPHABETICAL INDEXPRODUCT DESCRIPTI
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PIC Design - RBC Bearings

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