72 results for rbc ball bearing found in 1.000 seconds

and repair precision ground and rolled ball screws inch and metric sizes for a wide ... linear precision products www.rbcbearings.com 800.627.3639 ...

rbc bearings incorporated rbc bearings rbc has had a long tradition of innovation ... the company was founded in 1919 today rbc bearings has grown into a world-class ... of standard and custom-engineered bearings and related products with a product ... precision ground and rolled ball screws rbc precision ball screws offer ... axial play is achieved in preloaded rbc precision ball screws rbc precision ... ball screws are available in a wide range of ... choose from either precision ground ball screws in either inch or metric sizes ... depending on the application rbc will supply a ball screw with either ... internal or external ball returns special materials flanges and ... for quick delivery what we manufacture rbc bearings with facilities throughout ...

table of contents pages 1 rbc ball screws 4-5 1.1 classification of ball ... screws 1.2 standard precision ground ball screw availability table 1.3 standard ... precision rolled ball screw availability table 6-7 2.1 ... coefficient 25-27 2 features of rbc ball screws 9 driving torque 9.1 ball screw ... torque during acceleration 27-29 3 rbc ball screw selection procedure flow chart 4 ... accuracy of rbc ball screws 4.1 lead accuracy 4.2 mounting ... method 29-31 5 screw shaft design 5.1 ball screw manufacturing capability 5.2 ... 5.5.2 hardness/transition zone 12-18 11 rbc part number 18-20 11.1 standard ... 6.1 nut selection 6.1.1 series 6.1.2 ball re-circulation type 6.1.3 design of ... loads 6.2.2 rotating nut designs 12 rbc precision ground ball screws ...

1 rbc ball screws 1.1 classification of ball screws pages precision metric series mm ... -series external ball return tube integral flange 36-37 38-39 ... im-series internal ball return deflector integral flange inch ... series gn-series external ball return tube integral flange gv-series ... external ball return tube std v-thd mounting optional ... -series high helix-large lead external ball return tube std v-thd mounting optional ... metric series rms-series external ball return tube std v-thd mounting optional ... flange rs-series external ball return tube std v-thd mounting optional ... m-series miniature-fine lead 40-47 rbc ball screws 48-49 50-52 53 56-57 inch series ...

1.2 standard precision ball screw availability tables inch series ... 6 8 10 12 xxxx 1.3 standard rolled ball screw availability tables inch series ... 10 25 5 16 x 25 x x x 40 x x 50 x 63 x rbc custom ground precision ball screws are ... standard series shown please contact rbc for additional assistance 5 ...

2 features of rbc ball screws 2.1 reliability rbc s commitment ... at each manufacturing process of the ball screw rbc s quality system is built on ... free operation for the life of the ball screw 2.2 high accuracy all rbc ball ... the high mechanical efficiency of rbc ball screws results from the rolling contact ... of precision ball bearings and precisely ground ball threads as ... friction of the conventional acme screw ball screw power requirements are minimized ... transmission components may be utilized rbc s dynamic torque test measurement ... ° fig 2.1 mechanical efficiency of rbc precision ball screw 6 ...

is not smooth the axial play in rbc precision ball screws may be reduced to ... can be obtained simultaneously rbc currently manufactures both the single ... result in superior durability of rbc ball screws 2.6 lead time rbc has readily ... length requirements within days custom ball screws require our industry leading 6 ...

3 rbc ball screw selection procedure correct ... selection of the ball screw for the application is critical ... ensure proper operation and life of the ball screw the process of selection is shown ... etc lead accuracy precision ground ball screw length diameter lead nut ... sheet fig 3.1 procedure for selecting ball screws flow chart industrial rolled ... ball screw length diameter lead 8 ...

4 accuracy of rbc ball screws 4.1 lead accuracy lead accuracy ... of rbc ball screws is specified in three basic ... customer for the specific application rbc manufactures to iso standards however ... rbc can manufacture to a jis standard ...

table 4.2 tolerance on specified travel ep tolerance on specified travel ep tavel length mm above 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 up to including 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 class 1 6 7 8 9 10 11 13 15 18 22 26 32 class 3 12 13 15 16 18 21 24 29 35 41 50 62 76 class 5 23 25 27 32 36 40 47 55 65 78 96 115 140 170 class 7 class 10 units µm unless specified table 4.3 variation per 300mm v300 and wobble error v2 variation per 300mm and wobble error accuracy grade 300 2 class 1 6 4 class 3 12 6 class 5 ...

mounting accuracy tolerances to use a ball screw correctly and achieve long life ... tolerances is very important rbc s measurement processes conform to both ... iso jis standards for ball screw measurement rbc will help you ... as they vary with accuracy level 1 bearing runout with respect to the ball groove ... 2 journal runout with respect to the ball groove 3 shoulder perpendicularity with ... respect to the bearing diameter 4 nut flange perpendicularity ... with respect to the ball groove 5 nut body concentricity with ... respect to the ball groove 6 nut flat parallelism with ... respect to the ball groove 7 total indicated runout of the ... respect to the shaft center line all rbc ball screws are manufactured inspected ...

5 screw shaft design 5.1 ball screw manufacturing capability rbc s ... production capabilities are shown below rbc has manufactured ball screws up to 6 ... and up to 36 ft in length contact rbc if your required screw shaft dimensions ... 0 1 2 3 4 5 6 fig 5.1 production scope rbc manufactures ball screws with ... requirements including hollow ball screws for weight reduction or cooling ... purposes ball screws with specialty platings for ... combined right and left hand thread ball screws ball screws with specialized ... or gear driven rotating nut designs rbc is committed to satisfying all of our ...

the shaft typical mounting methods for ball screws are shown in the figure below ... fig 5.1 common end journal mounting for ball screws 13 ...

5.3.2 allowable tensile load when the ball screw will experience a tensile load ... the maximum load of the ball screw must be checked the formula is as ...

length c determine your end support bearing arrangement d at the intersection point ... touch a diagonal line this line is your ball screw outside diameter 200 Ų4 100 80 Ų3 ...

extremely important to ensure that the ball screw rotation speed is not resonant ... natural frequency of the screw shaft rbc uses a safety factor of 80 or less of ...

also restricted by the ability of the ball re-circulation system to withstand ... for this measure is the dm·n value dm ball circle diameter n rotation speed min-1 ... many ball screw manufacturers sell product with a ... non-heat treated ball re-circulation system which limits the ... to about 2,756 in/min 70,000 mm/min rbc s standard ball re-circulation systems ... for speeds beyond these values consult rbc 17 ...

to ensure an economical design for your ball screw application the ball thread ... of the screw shaft for the following ball nut models this is to facilitate the ... loading of the ball nut package a internal deflector type b ... type 5.5.2 hardness/transition zone rbc s ball screw shaft is induction ... designing the effective stroke consult rbc for details 6 nut design 6.1 nut ... the required accuracy delivery size and ball nut style must be considered when ... series for your application 6.1.2 ball re-circulation type select the ball re- ... circulation type according to the ball nut mounting and application standard ... large lead screw shaft diameter ratio ball deflector type · compact ball nut ...

flop­over deflector nut ball screw external yoke style deflector · ... of nuts tight clearance between the ball nut and mounting housing should be ... avoided impact to the ball nut can cause breakage or denting of ... the ball return system decide the ball nut type ball return method and flange ... of the nut package removal of the ball nut for assembly purposes should be ...

radial loads optimal performance of the ball screw is realized when the load ... distribution on steel balls rolling between the screw shaft and nut ... loading on a small portion of the steel balls thereby affecting operational ... radial load as much as possible consult rbc for design options to enhance life on ... nut designs proper consideration of the bearing support for rotating nut designs is ... important consult rbc for this configuration 7 specification ... stiffness poor system stiffness of ball screws results in loss of positioning ... accuracy 7.1.1 axial stiffness of the ball screw system axial elastic displacement ... and stiffness of the ball screw system is calculated as follows ... axial 1 kn 1 kb 1 displacement of ball screw in load on feed system lbs ... stiffness of ball screw system lb/in stiffness of screw ...

7.1.2 axial stiffness of screw shaft ks a fixed ­ free axe ks a ks axial stiffness of the screw shaft lb/in a cross-sectional area of the screw shaft in2 e modulus of elasticity 29 x 106 lb/in2 a distance between the support center of the nut in b fixed ­ fixed axexl ks axb ks axial stiffness of the screw shaft lb/in a cross-sectional area of the screw shaft in2 e modulus of elasticity 29 x 106 lb/in2 l unsupported length in a distance between the left support center of the nut in b distance between the right support center of the nut in 7.1.3 stiffness of nut kn an x e kn ln kn ...

7.1.4 preloading of ball screws preload eliminates axial ... thus improving the rigidity of the ball screw rbc offers the following preload ... double nut preload tension tension ball nut ball screw with the double nut ... nuts b single nut preloading oversized balls a single nut can be preloaded in two ... ways one method is to insert steel balls slightly larger than the ball groove ... space oversized balls which is referred to as four point ... for light preloading the use of spacer balls 1:1 ratio is standard to improve ... four­point contact nut idlers spacer ball screw shaft load balls effect of spacer ... balls 22 ...

tension lead tension lead a lead ball nut ball screw with the integral ... preload system one circuit of balls is loaded against the other circuit of ... balls to provide a tension preload this is ... of preload applying a load to the ball screw causes a deflection of both the ... ball nut and screw shaft grooves and of the ... ball bearing at the contact areas the initial ... the nut to a greater stiffness than the bearings in order to improve the overall system ... rate cannot compensate for an un-stiff bearing arrangement non ­ preloaded nut ...

accuracy b pre-tensioning of the ball screw lead the basic lead of a ball ... generation · optimization of preload of ball screw and support bearing · correct ... and supply of lubricant · increase the ball screw lead thus reducing rotational ... speed b cool the ball screw · use a hollow screw shaft to ... allow cooling fluid to flow through the ball screw and remove heat · cool the ...

8 service life the service life of ball screws should be considered in terms of ... .2 fatigue life the fatigue life of the ball screw may be estimated from the basic ... rated load as is the case of rolling bearings 8.2.1 basic dynamic rated load ca the ... which allows 90 of a group of identical ball screws rotated under the same ... economical and results in a large size ball screw typical targets for fatigue life ...

moment loads or radial load on the ball screw reduces both operability and ... life careful installation of the ball screw is critical 8.3 allowable load on ... grooves when the ball screw is to be used infrequently or at ... deformation at contact points of the balls to ball grooves equal to 0.01 of the ... ball diameter 8.3.2 calculation of allowable ...

material hardness screw shaft4150 vds ball nut4150 vds ball bearing52100 rockwell ... 58 ­ 62 58 ­ 62 62 ­ 64 special ball screws 440c ss,17-4 ph ss for special ... environments are available also consult rbc for surface treatments if necessary rbc ... coefficient when materials other than rbc standard materials are used and the ... load coa need to be corrected consult rbc for the correction factors 9 driving ... torque 9.1 ball screw torque 9.1.1 normal operation the ...

in normal efficiency 0.90 0.95 support bearing dynamic torque inlbs 9.2.2 driving ...

and safety design 10.1 lubrication rbc s standard grease is suitable for ... range of -100°f 73°c to 300°f 149°c rbc s standard grease qualified under the ... specification can be used in most ball screw applications rbc s standard oil ... special service conditions consult rbc 10.2 contaminant prevention any foreign ... matter or water if allowed to enter the ball screw may increase friction and cause ...

10.2.2 optional nylon wiper precision series wiper optional nylon wiper 10.2.3 optional combination felt nylon wipers precision series felt wiper nylon wiper g optional combination felt nylon wiper 10.2.4 optional brush felt wiper precision series felt wiper brush wiper retaining ring optional brush felt wiper 10.2.5 optional brush wiper rolled series wiper retaining ring optional brush wiper 30

ends of the screw shaft to prevent the ball nut from running off the end of the ... shaft stops should be located so the ball nut does not come into contact with ... them at the end of the required stroke rbc offers several styles of stops as shown ...

11 rbc part number the part numbering system ... used by rbc distinguishes the product and is ... indicates shaft length inches indicates ball nut style a std singlenut 2-circuit ... to v-thd flange a standard single bearing journal b standard duplexed bearing ... journal c standard multiple bearing journal d standard pillow block ... to v-thd flange a standard single bearing journal b standard duplexed bearing ... journal c standard multiple bearing journal d standard pillow block ...

11.2 non-standard precision series example gn1005 1 position 1 position 2 xxxxx 2 indicates series type indicates shop sequence number 11.3 standard rolled series example rs0308 1 position 1 position 2 position 3 12 2 f 3 a 4 3 5 5 6 x 7 position 4 position 5 position 6 position 7 indicates series type indicates threaded length of shaft indicated with of without flange f with flange o without flange indicates end annealing a annealed end o no annealing indicates annealed length in inches on left end journal or standard journal type e e1 f f1,h h1 see sketches length in inches of annealed ...

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12 rbc precision ground ball screws ­ dimensional tables rbc s ... standard series for precision ground ball screws covers a wide range of ball ... a metric lead series with an external ball return and an integral flange series ... is an inch lead series with an external ball return and integral flange series ... is an inch lead series with an external ball return and optional flange this ... series precision rolled series rbc s standard rolled series is provided ... less than 0.001 ft please consult rbc m series is a miniature stainless steel ... fine inch lead series with an internal ball return this is available preloaded and ... a metric lead series with an external ball return and an optional flange 3 ...

12.1 mm series metric external ball return integral flange non­preload and ... bcedl model no major screw dia j ball dia lead mm a b c max defgh no of hole ...

12.1 mm series metric external ball return integral flange continued k h ...

12.2 im series metric internal ball return integral flange abdfec major ... 1378 0.2812 0.1378 0.2812 0.2812 0.2812 ball dia lead mm abcd max efgh 5 5 5 5 5 10 ...

12.2 im series metric internal ball return integral flange continued g g ...

12.3 gn series inch external ball return integral flange abcbcaeedd non­ ... 000 3.000 3.000 bababbbbbbbbbbbbbbbbbbj ball dia 0.1250 0.1250 0.1250 0.1250 0.1250 ...

12.3 gn series inch external ball return integral flange continued k h ...

12.3 gn series inch external ball return integral flange continued right ... 000 2.000 2.000 2.250 2.500 2.500 3.000 ball dia 0.1250 0.1562 0.1250 0.1562 0.1250 ...

12.3 gn series inch external ball return integral flange continued k h ...

12.3 gn series inch external ball return integral flange flange mount ... 1.50 2.00 2.00 2.00 2.25 2.50 2.50 3.00 ball dia 0.1250 0.1562 0.1250 0.1250 0.1562 ...

12.3 gn series inch external ball return integral flange flange mount ...

12.3 gn series inch external ball return integral flange base mount ... 1.50 2.00 2.00 2.00 2.25 2.50 2.50 3.00 ball dia 0.1250 0.1562 0.1250 0.1250 0.1562 ...

12.3 gn series inch external ball return integral flange base mount ...

12.4 gv series inch external ball return optional flange a c f type a i ... 250 1.500 1.500 1.500 1.500 2.250 2.250 ball dia nut lead type a b max c d v ...

12.4 gv series inch external ball return optional flange continued d 60 ...

12.5 rb series inch external ball return optional flange high helix ­ ... 000 1.500 1.500 2.000 2.000 2.000 2.000 ball dia 0.1250 0.1562 0.1562 0.1562 0.1875 ... 000 1.500 1.500 2.000 2.000 2.000 2.000 ball dia 0.1250 0.1562 0.1562 0.1562 0.1875 ...

12.5 rb series inch external ball return optional flange high helix ­ ...

12.5 rb series inch external ball return optional flange high helix ­ ...

12.6 p series inch internal ball return miniature ­ fine lead l2 l1 d1 ... 0.250 0.250 0.375 0.500 0.500 0.750 nom ball dia 0.0394 0.0394 0.0625 0.0393 0.0625 ...

.7 standard end journals type a­ single bearing agbcfg type b­ duplexed bearings ... im series rb series a type a single bearing b 0.75 e 0.328 type b duplexed bearing ... a 2.00 b 1.12 e 0.687 type c multiple bearing a 2.69 b 1.81 e 1.390 1.62 gv0605 ... in inches unless specified 54 www.rbcbearings.com ...

continued type c­ multiple duplexed bearings agcfbb type d­ pillow block a d d ... d pillow block nut n-00 washer w-00 bearing 200 a 2.25 b .3750 3745 c 1/8x1/16 d 1. ...

13 rbc precision rolled ball screws ­ dimensional tables 13.1 rms ... series metric external ball return optional flange swept radius for ... 57.175 lead mm 5 5 10 10 25 5 10 10 10 ball dia 0.1378 0.1378 0.1378 0.1378 0.1562 ...

13.1 rms series metric external ball return optional flange continued k2 45 ...

13.2 rs series inch external ball return optional flange dfga 1 8 ­ 27 ... 723 1.723 1.723 1.868 2.222 2.222 2.483 ball dia 0.078 0.078 0.125 0.125 0.125 0.125 ...

13.2 rs series inch external ball return optional flange continued k2 45 ...

13.2 rs series inch external ball return optional flange continued l ... 500 3.000 recommended preload preloaded ball nut part no 8103-448-004 8105-448-008 ...

13.3 m series inch internal ball return miniature-fine lead l2 l1 d1 d2 ... dia d1 0.187 0.187 0.312 0.298 nom ball dia 0.0394 0.0394 0.0394 0.0625 model ...

13.4 standard end journals type e type f type hiabheechjkmhnopmegf type e1 dgfdlgfdl type f1 type h1 jbkcmopmdffdlfdl model no rs0605 rls0605 rms1605a rs0705c1 rs0705 rs0702 rss0702 rs1004c1 rls1004c1 rs1004a rls1004a rs1002 rs1001 rms2505a rms2510a rms2525a rs1105 rs1501 rs1504 rs1502 rls1502 rms4005a rms4010a rs2002 rls2002 rs2001 rms5010a screw dia abcdefghijklmnop 0.625 2.10 0.812 0.331 .4726 4723 .406 405 .469-32 0.125 0.625 3.00 1.70 1.225 .4756 4753 0.500 3.79 2.49 2.014 0.750 2.48 0.940 0.449 .5908 5905 .500 499 .586-32 0.125 0.625 3.54 2.08 1.586 .6153 6150 0.625 4.60 3.22 2.729 1.000 ...

13.5 standard end journals miniature fine lead series type aa a type bb a b type cc abcccdp­ series model no p-0405 p-0410 p-0610 p-0805 p-0810 p-1210 a type aa c .1876 1873 .1876 1873 .2501 2498 .3751 3748 .3751 3748 .5002 4999 a 1.125 1.125 1.750 1.875 1.875 2.375 b type bb c .1876 1873 .1876 1873 .2501 2498 .3751 3748 .3751 3748 .5002 4999 d 0.156 0.156 0.218 0.218 0.218 0.250 a 0.50 0.50 0.75 0.75 0.75 1.00 type cc b 0.156 0.156 0.218 0.218 0.218 0.250 c .1876 1873 .1876 1873 .2501 2498 .3751 3748 .3751 3748 .5002 4999 0.156 0.156 0.218 0.218 0.218 0.250 0.625 0.625 0.937 1.000 1.000 1.250 ...

14 quickturn® ball screw repair service rbc has repaired ball screws on the ... 800.62.renew for details quickturn® ball screw repair planning guide repair type ... weeks weeks weeks weeks warranty all ball screws are repaired by highly skilled ... guarantee all workmanship on repaired ball screws for one year 64 ...

backlash ­ the free motion between the ball nut and screw shaft without rotation ... axial rigidity ­ the resistance of the ball screw assembly to axial deflection ... load backdriving ­ the ability of the ball nut or screw shaft to rotate when an ... to the opposite member of the assembly ball bearing ­ the integral part of the ball ... and conforms to the accuracy of the ball path created by the assembly of the nut ... screws shaft and ball spacer ball idler ­ a ball that acts as an idler ... from the interplay between load balls the diameter of which is smaller than ... the adjacent load balls and carries no axial thrust load ball ... a specified number of recirculating balls travel transmitting the load reaction ... between the nut and screw shaft ball groove ball track ­ the helical groove ...

critical speed ­ rotational speed of a ball nut or ball screw shaft that produces a ... resonant vibration of the ball screw shaft deflection elastic ... deformation ­ the deformation of the ball screw assembly given an applied load ... actual force measured at a radius of a ball screw assembly with or without wipers ... including drag torque to actuate the ball screw assembly drunkenness ­ the ... characteristic of a ball screw assembly under load and rotation ... constant centric axial load that the ball screw can theoretically withstand for a ... revolutions efficiency ­ 90 ­ 95 for ball screws measured by the following ... end journal ­ the portion of the ball screw upon which is mounted the support ... bearings and is specified to conform to ... or cycles fatigue life ­ life of the ball screw assembly under the condition of a ...

leadactual ­ the measured lead of the ball screw thread from a specified starting ... measured by the actual travel of the ball nut or accumulation of lead error of ... specified life ­ the usable life of a ball screw assembly given in terms of inches ... pitch ­ the distance from a point on a ball track to a corresponding point on the ... next track parallel to the ball screw or ball nut axis pitch ... passing through the centers of the balls when they are in contact with the ball ... screw and ball nut tracks precision ­ term used to ... preload ­ the use of one group of ball grooves in opposition to another to ... backlash and increase stiffness of a ball nut assembly radial load ­ load acting ... ­ total free radial motion between the ball nut and screw shaft without rotation ... reversibility ­ the ability of a ball screw assembly to reverse direction ...

­ the number of revolutions that the ball nut track makes about the screw axis ... vee-thread ­ threaded portion of ball nut or screw shaft variation ­ rate of ... condition velocity ­ refers to ball velocity within the ball track wipers ... ­ protecting elements included in the ball nut to exclude foreign material and ... in lead error for one revolution of the ball nut 16 conversion factors a length 1m ...

notes 69

notes 70

17 application data form ball screw application data form customer ... customer part no phone no rbc part no contact date eng 1 ... or n c universal 2 rotating member ball screw ball nut 3 major diameter ... 17 unsupported length 18 required ball return system internal external ...

innovation commitment quality rbc bearings has been producing bearings in the usa ... since 1919 in addition to unique custom bearings rbc offers a full line of standard ... industrial and aerospace bearings including spherical plain bearings ... ® seal crosslube® duralubetm milltufftm bearings and self-lubricating bearings available ... in inch and metric sizes thin section ball bearings standard cross sections to one ... all sizes and standard cross sections ball bearings precision ground semiground ... loads long life smooth operation nicetm ball bearings are offered in caged and full ... configurations self-lubricating bearings radial thrust rod ends spherical ... bearings high temperature high loads available ... sizes fiberglide® self-lubricating bearings cam followers standard stud heavy stud ...