JAPANESE INDUSTRIAL STANDARD Rubber Shaft Couplings JIS/B 1455. Translated and Published by Japanese Standards Association [Printed in Japan UDC 621.825.7 8sthe origit In the event of any doubt arising, al Standard in Japanese is to be final authority.JAPANES| Ru 1. Scope This Japanese Industrial hereinafter referred to as tl Remark: The units an Standard are appended for| 2. Definitions ‘The principal terms use| (1) deviation shafts joined by eccentricity in Fig.) @)y Di in_aligni and angular devia UDC 621,825.7 E INDUSTRIAL STANDARD gis ber Shaft Couplings B 1455-1988 Standard specifies rubber shaft couplings, ‘hg couplings", used for general machines. numerical values given in { } in this based on the traditional unit system and are informative reference. in this Standard are defined as follows: ent of axes Generic term for the eccentricity ifion between the centre lines (axes) of two coupling. stance between both axes (indicated by letter 6 Applicable Standards: JIS B 0401-System of Li JIS B 0405-Permissible Tolerance I JIS B 0407-Permissible Indication fc JIS B 0903~Cylindrical JIS B 0904-1/10 Conical JIS G 3101-Rolled Steel JIS G 3506-High Carbo: JIS G 4051-Carbon Stee} JIS G 5501-Gray Iron JIS K 6385-Testing Met JIS K 6386-Rubber Mats mits and Fits Machining Deviations in Dimensions without \dication eviations in Dimensions without Tolerance Ir Tron Castings haft Ends || Shaft Ends for General Structure Steel Wire Rods s for Machine Structural Use lastings ods for Rubber Vibration Isolators rials for Vibration Isolators2 | B 1455-1988 | | | (3) angular devjation Angular deviation between both axes (indi- cated by letter a in Fig.). 4 Lid in 7.2 (5)) Fig. (4) _ static torsign spring constant Torque necessary for giving a unit angle 6 Sf static deflection to rubber part [indiceted by (hi) (5) normal torque Torque normally applied in one direction without Fluctuation (Indicated by 7 in Attached Table), 3. Classification Couplings shall bp classified by the combination of symbol for permissi- ble value of deviation petween the centre lines of two shafts and that for static torsion spring cpnstant, as given in Table 1. Table 1, Classification atasesyesatvalniceter sence () Static torsion spring constant syabo1 | Divistog of pemtssible Symbol | Division of spring constant eaeelae 2 _| Considerably seal x * | Seat Ba | sitghesy| targe «8 | toree Ba | Constdersbiy Taree ciciee cae aerate inner Note (1) Refer to Table 2. + Quality 4.1 Couplings shall be free from such defects as flaws, cracks and fissures in which would adversely affect their use. 4.2 Couplings shall transmit the normal torque (7) given in Attached Table and shall have gufficient life. 4.3 Permissible values of deviation in alignment of the centre lines of two shafts and the static torsion spring constant of the coupling shall be as given in Table 2. o€ 0 ¢3 B 1455-1988 Table 2, Deyiation in Alignment of Axes and Stdtic Torsion Spring Constant Permissible value of deviatiop In Permissible value of static alignment of centre Ifnes of ghafts torsion spring constant ‘angulat devi~ Pernissibie value symbor [Fecentriesey | Angelet ext [sym recpiccibie aioe, 1 hax K 2 2 Tor over to and excl. 47 Refer to [ K 4 4 Tor over to and excl, 87 E2 Attached 2 hax. Table K 8 8 Tor over to and excl. 167 coe ellie K 16 16 T and over 4.4 Couplings shall be so|balanced that they do not cause any vibra~ tion. 5. Dimensions and Constru: 5.1 Principal dimensions Table. 5.2 Shaft bore diameters ion }f couplings shall be as given in Attached f couplings shall be not more than the maxi- mum diameter given in Attached Table, and shall generally conform to JIS B 0903 or JIS B 0904. In this case, dimensional tolerances on the shaft bore of couplings shall generally be H 7 specified in JIS B 0401, Remark: subject to th 5.3 Dimensional tolerance: shall be as follows: For machined parts For parts as cast 5.4 The coupling shall b The chaft boye diameter may be se roughly machined, ay greement between the parties concerned. of the parts other than those to be fitted Medium grade of JIS B 0405 Fine grade of JIS B 0407 provided with a portion which enables to measure the deviation in alignment of the centre lines of shafts. Permis~ sible value of run-out at this portion shall be as given in Table 3. fable 3. Run-out Unit: mm = Permissible values of run-out(?) = outside 7 dianeter of ~~ synbol Pa Er a neasuring portion ~~ | 250 o under 0.08 mex. 0.08 max. 0.16 ax. over 250 0.06 max. 0.22 wan. 0.25 max. \ Note (2) These permissibip values shall be applied to radial ané axial run-out of outesde diane| fer of the measuring. portion.4 B 1455-1988 5.5 Dimensions of affect adversely the m 5.6 Botts to be ust or by other means. 5.7 The coupling the play in difficulty. 6. Materials Materials to be u: in Table 4 or shall be! axial direc} Principal p rubber part shall be so accurate that they may not unting and use, d for couplings shall be locked with spring washers hall be so constructed that it is capable of absorbing ion to allow the machine which uses it to run with no ed for each part of the coupling shall be as specified equivalent or superior in quality to them. Table 4, Materials of Parts L reat) Material Rubber part IS K 6386 Flange and pre jsure ring | FC 20 of JIS G S501 or $ 20 C of JIS 6 4051 Bolt, nut and lasher SS G1 of JIS G 3101 Spring washer Note (3) The 7, Inspection 7.1 Classification Ref the SWRH 62 A oF SWRH 62 B of JIS G 3505 Inases of principal parts above-mentioned are shown in rence Figs. 1 to 6. Reference Figs. show some examples of lconstruction of couplings. f Inspection The inspection of couplings shall be classified into type Ingpection(®) and acceptance inspection(®). The sampling inspection plan, when used for the type inspection and inspection,| shall be determined by the agreement between the acceptance parties concerned. Notes CO The prod ype inspection is to determine whether the quality of iets satisfy all of the designed characteristics. () Acceptance inspection is an inspection carried out, upon the same type the lelivery of products of the same design and of the manufacture as those which have already passed the inspection, to determine whether or not they satisfy equired characteristics. 7.2 Type Inspection The type inspection shall be performed as fol- lows: M @ @) The appea coupling, Dimensions When the the normal ance shall be visually inspected on every part of the ind shall meet the requirements of 4.1, | and construction shall satisfy the requirements of 5. upling is loaded statically with a torque five times torque given in Attached Table for 3 min, no abnor- mality shall be found in every part. 06 @'(4) then the coupling| is under a condition and angular deviat 5 B 1455-1988 rotated up to 10® turns under no load where the permissible values of eccentricity ion specified in Table 2 are given at the same time, no abnormality shall be found in any part mentioned in Table 4. The test revi lutions shall be as given in Table 5. Tabl¢ 5. Test Revolutions eee 10] 10000] 14.000 | 20000 T erin reset esl sete [6s tmzsne}t.at| art] asst] vor] ty] oa || osm ‘sisisu) th 5004 6.6 1405 | 16.6 1100 | 10.5 030 66 jam, Stepmt | | | | (5) The static torsion ance with the det. JIS K 6385 with nf} spring constant shall be measured in accord- rmination of spring constant test specified in cessary modification, and the values obtained from the following] formula shall satisfy the requirements of Table 2. where 7.3 Acceptance Inspecti formed in accordance with ( 8. Corrosion Protection ‘The coupling shall be cation of anticorrosive agent by an alternative means. ~Oh)-0T,) kt: static torsion spring constant (Nem/rad) (kgf+m/rad} Ty: upper limit of static test torque It = (1.25 to 1.5) 7Nem{kgf+m}] Ti: lower limit of static test torque [7 = (0.5 to 0.75)7Nem(kgf-m)}] T: normal static torque (N+m) (kgf+m) : angular displacement (rad) at 7; angular displacement (rad) at 7, ‘The acceptance inspection shall be per ) and (2) of 7.2. jubjected to the corrosion protection by appli- of casy removal with petroleum type solvent or6 | B 1455-1988 | 9. Product Designati The coupling shall be designated by the number or title of this Stand- ard, designation (symbol for permissible deviation in alignment of centre lines of shafts and symbol for static torsion spring constant), outside diameter of coupling x/ overall length of coupling, and (finish of shaft bore). The symbol for permissible deviation in alignment of centre lines of shafts, symbol for static torsion spring constant, and finish of shaft bore may be omitted, if unnecessary. Examples: JIS H 1455, 250 (E 4, K 16)-630 x 400 (bore diameter 80 with keyway) Rubber shaft coupling, 250-630 x 400 10. Marking | The coupling shall be marked with the following particulars on its suitable place. | q@ Designation (2) Manufacturpr's name or identification mark @t1 B 1455-1988 ve Attached Table. Rubber Shaft Coupling Remark: . This Fig. is| given to indicate dimensions, and does not show any actual construction. Unit: mm sas | UT |e ial | ane i a sem ikatem | He | [P| L |» [eves] es 10 wr | we] — aT me] | 100) BP |e | ae ef ere | ap w|i) fs) «[ ian) 3) 16 waz] was | too | veo! $9 | S18 | 2 0 waa | a] 20 wo | 160 | 125 | 200 | ee | | mo | paw oo Lh zal = peas) Sh ke] LS 8 —aowertoe | vaso pi; | 8 50| ae “ree fe] 8 be ae 3000 | soo isioy | 125] 0 | uo | 35 I Tio | 7100 7281 90 | foo | wo! 20] soo] ro “Seon | voo0 ony | we0 | oo! foo aso} soo] seo} oo] — | — | 0] i000) 96/12] 2s Tee | ee a m= mo [fe | 0 so) | of | epi) | bee eo L |8 B 1455-1988 Reference Fig. 1 Rubber part Flange Bolt Spring washer Pressure ring »€ @¢1@ 1® [Reference Fig. 2 @ No. Name 1 Rubber part 2 Flange 3 Bott @ Spring washer 9 B 1455-1988u B 1455-1988 Reference Fig. 4 2) to. Nane | Ko. Mane z Hbber pare z Spring washer 2 Flange 3 Slorced wut 3 apie 6 Spite pin Reference Fig. 5 1@ Wo. ane 7 Rubber part Ge 7 Flenee i aise |sssTesnene12, B 1455-1988 ei Reference Fig. 6 Rubber pare FlangeEstablished by Minist Date of Establishment Date of Revision: 1 Date of Public Notice Investigated by: Jap Di Te This Eng! Jap: a B 1455-1988 Eaition 1 Japanese Text r of International Trade and Industry 1910-07-01 88-05-01 lin Official Gazette: 1986-05-14 nese Industrial Standards Committee sional Council on Machine Elements hnical Committee on Shaft Couplings ish translation is published by: nese Standards Association 14, Akasaka 4, Minato-ku, ‘Tokyo 107’Japan © ISA, 1989 Printed in Tokyo by Hohbunsha Co., Lid