1、 SURFACE VEHICLE STANDARD J755 MAY2015 Issued 1929-02 Reaffirmed 2015-05 Superseding J755 DEC2009 Marine Propeller-Shaft Ends and Hubs RATIONALE J755 has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE This SAE Standard specifies basic tolerances and dimensions for inboard p
2、ropeller-shaft ends, propeller hubs and keyways for shaft sizes 3/4 in (19 mm) through 8 in (203 mm). 2. REFERENCES 2.1 Applicable Publications The following publications form a part of this specification to the extent specified herein. Unless otherwise specified, the latest issue of SAE publication
3、s shall apply. 2.1.1 ASME Publications Available from American Society of Mechanical Engineers, 22 Law Drive, Fairfield, N.J. 07007, Tel: 973-882-1170, www.asme.org. (Also available from ANSI, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org.) ASME B18.2.2 Square and Hex
4、 Nuts ASME B46.1 Surface Texture, Surface Roughness, Waviness and Lay 3. TOLERANCES FOR SAE MARINE TAPERSSURFACE FINISH The machined surfaces of propeller hubs, shafting, and keyways shall have a surface finish of 32 uin RMS, 29 uin RA (O.81 um RMS, 0.74 um RA) maximum as defined by ASME B46.1. 3.1
5、Basic Dimensions Taper per foot measured on the diameter and diameter of small end of taper shall be basic dimensions. _ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely v
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9、http:/www.sae.org/technical/standards/J755_201505 SAE INTERNATIONAL J755 Reaffirmed MAY2015 Page 2 of 9 3.2 Taper Tolerances for Hub Bores Sizes in (19 mm) to 1 in (32 mm) inclusive, 0.7500 in (19 mm) (+0.0000, 0.0020) in taper per ft Sizes 1 3/8 in (35 mm) to 2 in (51 mm) inclusive, 0.7500 in (19 m
10、m) (+0.0000, 0.0019) in taper per ft Sizes 2 in (57 mm) to 3 in (76 mm) inclusive, 0.7500 in (19 mm) (+0.0000, 0.0015) in taper per ft Sizes 3 in (83 mm) to 5 in (140 mm) inclusive, 0.7500 in (19 mm) (+0.0000, 0.0013) in taper per ft Sizes 6 in (152 mm) to 8 in (203 mm) inclusive, 1.0000 in (25 mm)
11、0.0000, 0.0013) in taper per ft FIGURE 1 - PROPELLER-SHAFT ENDS TABLE 1 - DIMENSIONS FOR SHAFTS FROM 3/4 in (19 mm) TO 3 in (76 mm) IN DIAMETER Nominal Shaft Dia, A Dia Small End B Min Dia Small End B Max Taper Length, C Keyway Width, D Nominal Keyway Width D Min Keyway Width, D Max Keyway Side De
12、pth(1)E Nominal Keyway Side Depth(1)Min Keyway Side Depth(1)Max Keyway Fillet Radius,(2)R Thread(3) F Dia Thread(3) F Threads per in End of Taper to End of Thread, G Exten- sion Beyond Taper, H 0.75 0.624 0.626 2 0.19 0.1865 0.1875 0.09 0.095 0.097 0.03 1/2 13 1.06 1.31 (19.05) (15.85) (15.90) (50.8
13、0) (4.83) (4.74) (4.76) (2.29) (2.41) (2.46) (0.76) (26.92) (33.27) 0.88 0.726 0.728 2.38 0.25 0.249 0.250 0.13 0.125 0.127 0.03 5/8 11 1.25 1.5 (22.35) (18.44) (18.49) (60.45) (6.35) (6.32) (6.35) (3.30) (3.18) (3.23) (0.76) (31.75) (38.10) 1 0.827 0.829 2.75 0.25 0.249 0.250 0.13 0.125 0.127 0.03
14、3/4 10 1.43 1.75 (25.40) (21.01) (21.06) (69.85) (6.35) (6.32) (6.35) (3.30) (3.18) (3.23) (0.76) (36.32) (44.45) 1.13 0.929 0.931 3.13 0.25 0.249 0.250 0.13 0.125 0.127 0.03 3/4 10 1.43 1.75 (28.70) (23.60) (23.65) (79.50) (6.35) (6.32) (6.35) (3.30) (3.18) (3.23) (0.76) (36.32) (44.45) 1.25 1.030
15、1.032 3.5 0.31 0.3115 0.3125 0.16 0.157 0.160 0.06 7/8 9 1.63 2 (31.75) (26.16) (26.21) (88.90) (7.87) (7.91) (7.94) (4.06) (3.99) (4.06) (1.52) (41.40) (50.80) 1.38 1.132 1.134 3.88 0.31 0.3115 0.3125 0.16 0.157 0.160 0.06 1 8 1.81 2.25 (35.05) (28.75) (28.80) (98.55) (7.87) (7.91) (7.94) (4.06) (3
16、99) (4.06) (1.52) (45.97) (57.15) 1.50 1.233 1.235 4.25 0.38 0.374 0.375 0.19 0.189 0.192 0.06 1 1/8 7 2 2.43 (38.10) (31.32) (31.37) (107.95) (9.65) (9.50) (9.53) (4.83) (4.80) (4.88) (1.52) (50.80) (61.72) 1.75 1.437 1.439 5 0.44 0.4365 0.4375 0.22 0.219 0.222 0.06 1 1/4 7 2.25 2.75 (44.45) (36.5
17、0) (36.55) (127.00) (11.18) (11.09) (11.11) (5.59) (5.56) (5.64) (1.52) (57.15) (69.85) 2 1.640 1.642 5.75 0.5 0.499 0.500 0.25 0.251 0.254 0.06 1 1/2 6 2.63 3.13 (50.80) (41.66) (41.71) (146.05) (12.70) (12.67) (12.70) (6.35) (6.38) (6.45) (1.52) (66.80) (79.50) 2.25 1.843 1.845 6.5 0.56 0.561 0.56
18、25 0.28 0.281 0.284 0.09 1 3/4 5 3 3.5 (57.15) (46.81) (46.86) (165.10) (14.22) (14.25) (14.29) (7.11) (7.14) (7.21) (2.29) (76.20) (88.90) 2.50 2.046 2.048 7.25 0.63 0.6235 0.625 0.31 0.315 0.312 0.09 1 3/4 5 3 3.5 (63.50) (51.97) (52.02) (184.15) (16.00) (15.84) (15.88) (7.87) (8.00) (7.92) (2.29)
19、 (76.20) (88.90) 2.75 2.257 2.259 7.88 0.63 0.6235 0.625 0.31 0.313 0.316 0.09 2 4-1/2 3.5 4 (69.85) (57.33) (57.38) (200.15) (16.00) (15.84) (15.88) (7.87) (7.95) (8.03) (2.29) (88.90) (101.60) 3 2.460 2.462 8.63 0.75 0.7485 0.750 0.31 0.311 0.314 0.09 2 1/4 4-1/2 3.88 4.38 (76.20) (62.48) (62.53)
20、219.20) (19.05) (19.01) (19.05) (7.87) (7.90) (7.98) (2.29) (98.55) (111.25) 1. Keyway shall be cut parallel to taper. 2. Fillets are mandatory for keyways on all shaft diameters. 3. Threads are Unified. SAE INTERNATIONAL J755 Reaffirmed MAY2015 Page 3 of 9 TABLE 2 - DIMENSIONS FOR SHAFTS FROM 3/4
21、in (19 mm) TO 3 in (76 mm) IN DIAMETER (CONTINUED) Nominal Shaft Dia, A Undercut J Undercut K Dia of Pin End, L Length Of Pin End, M Cotter Pin Hole N Cotter Pin Hole P (Drill) Cotter Pin, Q Nominal Dia Cotter Pin, Q Nominal Length Nuts(1)Size Plain Thickness T Jam Thickness, W Keyway Length, X Min
22、0.75 0.39 0.13 0.38 0.25 1.14 0.14 0.13 0.75 1/213 0.5 0.31 1.5 (19.05) (9.91) (3.30) (9.65) (6.35) (28.96) (3.56) (3.30) (19.05) (12.70) (7.87) (38.10) 0.88 0.48 0.13 0.44 0.25 1.33 0.14 0.13 0.75 5/811 0.63 0.38 1.78 (22.35) (12.19) (3.30) (11.18) (6.35) (33.78) (3.56) (3.30) (19.05) (16.00) (9.65
23、) (45.21) 1 0.59 0.13 0.5 0.31 1.52 0.14 0.13 1 3/410 0.75 0.44 2.13 (25.40) (14.99) (3.30) (12.70) (7.87) (38.61) (3.56) (3.30) (25.40) (19.05) (11.18) (54.10) 1.13 0.59 0.13 0.5 0.31 1.52 0.14 0.13 1 3/410 0.75 0.44 2.13 (28.70) (14.99) (3.30) (12.70) (7.87) (38.61) (3.56) (3.30) (25.40) (19.05) (
24、11.18) (54.10) 1.25 0.72 0.13 0.63 0.38 1.72 0.17 0.16 1.25 7/89 0.88 0.5 2.81 (31.75) (18.29) (3.30) (16.00) (9.65) (43.69) (4.32) (4.06) (31.75) (22.35) (12.70) (71.37) 1.38 0.81 0.13 0.75 0.44 1.91 0.17 0.16 1.5 1 8 1 0.56 3.19 (35.05) (20.57) (3.30) (19.05) (11.18) (48.51) (4.32) (4.06) (38.10)
25、25.40) (14.22) (81.03) 1.5 0.91 0.19 0.88 0.44 2.09 0.17 0.16 1.5 1-1/87 1.13 0.63 3.5 (38.10) (23.11) (4.83) (22.35) (11.18) (53.09) (4.32) (4.06) (38.10) (28.70) (16.00) (88.90) 1.75 1.03 0.19 1 0.5 2.36 0.2 0.19 1.75 1-1/47 1.25 0.75 4.22 (44.45) (26.16) (4.83) (25.40) (12.70) (59.94) (5.08) (4.
26、83) (44.45) (31.75) (19.05) (107.19) 2 1.25 0.19 1.25 0.5 2.73 0.2 0.19 2 1-1/26 1.5 0.88 4.94 (50.80) (31.75) (4.83) (31.75) (12.70) (69.34) (5.08) (4.83) (50.80) (38.10) (22.35) (125.48) 2.25 1.38 0.19 1.38 0.5 3.14 0.27 0.25 2.25 1-3/45 1.75 1 5.63 (57.15) (35.05) (4.83) (35.05) (12.70) (79.76) (
27、6.86) (6.35) (57.15) (44.45) (25.40) (143.00) 2.5 1.44 0.19 1.44 0.5 3.14 0.27 0.25 2.25 1-3/45 1.75 1 6.09 (63.50) (36.58) (4.83) (36.58) (12.70) (79.76) (6.86) (6.35) (57.15) (44.45) (25.40) (154.69) 2.75 1.69 0.25 1.69 0.5 3.64 0.27 0.25 2.5 2 4-1/2 2 1.13 6.66 (69.85) (42.93) (6.35) (42.93) (12.
28、70) (92.46) (6.86) (6.35) (63.50) (50.80) (28.70) (169.16) 3 1.94 0.25 1.94 0.5 4.02 0.27 0.25 3 2-1/44-1/2 2.25 1.25 7.34 (76.20) (49.28) (6.35) (49.28) (12.70) (102.11) (6.86) (6.35) (76.20) (57.15) (31.75) (186.44) 1. Nuts are to be semifinished stock per ASME B18.2.2 3.3 Taper Tolerances for Sha
29、fts Sizes in (19 mm) to 1 in (32 mm) inclusive, 0.7500 in (19 mm) (+0.0020, 0.0000) in taper per ft Sizes 1 3/8 in (35 mm) to 2 in (51 mm) inclusive, 0.7500 in (19 mm) (+0.0019, 0.0000) in taper per ft Sizes 2 in (57 mm) to 3 in (76 mm) inclusive, 0.7500 in (19 mm) (+0.0015, 0.0000) in taper per ft
30、Sizes 3 in (83 mm) to 5 in (140 mm) inclusive, 0.7500 in (19 mm) (+0.0013, 0.0000) in taper per ft Sizes 6 in (152 mm) to 8 in (203 mm) inclusive, 1.0000 in (25 mm) (+0.0013, 0.0000) in taper per ft 4. BASIC DATAKEYWAYS The keyway shall be cut parallel to the shaft taper. At the small end of the hub
31、 length and shaft taper length, the keyway shall have the specified side depth. The keyway side depth shall be measured normal to the axis of the taper, not normal to the surface of the taper. The top corners of the keyways shall be rounded to a radius half of that used at the bottom of the keyway.
32、4.1 Keys Keys for use in filleted keyways must be chamfered so that the corners of the key do not touch the keyway fillets. 4.2 Small-End Diameter of Taper for Hubs For nominal bore diameters 3 in (83 mm) to 4 in (102 mm) inclusive, the small end of the taper shall be 0.8125 times the nominal bore d
33、iameter. For nominal bore diameters 4 in (114 mm) to 5 in (140 mm) inclusive, the small end of the taper shall be 0.84375 times the nominal bore diameter. For nominal bore diameters 6 in (152 mm) to 8 in (203 mm) inclusive, the small end of the taper shall be 0.79167 times the nominal bore diameter.
34、 SAE INTERNATIONAL J755 Reaffirmed MAY2015 Page 4 of 9 4.3 Small-End Diameter of Taper for Shafts For nominal shaft diameters in (19 mm) to 2 in (64 mm) inclusive, the small end of the taper shall be 0.8125 times the nominal shaft diameter plus 0.01562 in (0.39675 mm). For nominal shaft diameters 2
35、in (70 mm) to 4 in (102 mm) inclusive, the small end of the taper shall be 0.8125 times the nominal shaft diameter plus 0.02344 in (0.59538 mm). For nominal shaft diameters 4 in (114 mm) to 5 in (140 mm) inclusive, the small end of the taper shall be 0.84375 times the nominal shaft diameter plus 0.0
36、3125 in (0.79375 mm). For nominal shaft diameters 6 in (152 mm) to 8 in (203 mm) inclusive, the small end of the taper shall be 0.79167 times the nominal shaft diameter plus 0.04167 in (1.05842 mm). 4.4 Intermediate-Size Tapers The required small-end taper diameter of hub bore and shaft end for inte
37、rmediate diameters not covered by this Standard shall be calculated from data given above using the next smaller standard taper data. The keyway for intermediate-size hub bore and shaft end shall be that specified for the next smallest standard bore and shaft. FIGURE 2 - PROPELLER-SHAFT ENDS SAE INT
38、ERNATIONAL J755 Reaffirmed MAY2015 Page 5 of 9 TABLE 3 - DIMENSIONS FOR SHAFTS FROM 3-1/4 in (83 mm) TO 8 in (203 mm) IN DIAMETER(1)Nominal Shaft Dia, A Dia Small End, B Min Dia Small End, B Max Taper Length, C Keyway Width, D Nominal Keyway Width D Min Keyway Width D Max Keyway Side Depth,(2)E Nomi
39、nal Keyway Side Depth(2)E Min Keyway Side Depth(2) E Max Keyway Fillet Radius, R Thread(3)F Dia Threads(3) F Threads per in End of Taper to End of Thread G Extension Beyond Taper, H 3.25 2.663 2.665 9.38 0.75 0.7485 0.750 0.31 0.311 0.314 0.13 2 1/2 4 4.38 5.13 (67.64) (67.69) (238.25) (19.05) (19.0
40、1) (19.05) (7.87) (7.90) (7.98) (3.30) (111.25) (130.30) 3.5 2.866 2.868 10.13 0.88 0.8735 0.875 0.31 0.310 0.313 0.13 2 1/2 4 4.38 5.13 (72.80) (72.85) (257.30) (22.35) (22.19) (22.23) (7.87) (7.87) (7.95) (3.30) (111.25) (130.30) 3.75 3.069 3.071 10.88 0.88 0.8735 0.875 0.31 0.310 0.313 0.13 2 3/4
41、 4 4.75 5.5 (77.95) (78.00) (276.35) (22.35) (22.19) (22.23) (7.87) (7.87) (7.95) (3.30) (120.65) (139.70) 4 3.272 3.274 11.63 1 0.9985 1.000 0.31 0.309 0.312 0.13 3 4 5.13 5.88 (83.11) (83.16) (295.40) (25.40) (25.36) (25.40) (7.87) (7.85) (7.92) (3.30) (130.30) (149.35) 4.5 3.827 3.829 10.75 1.13
42、1.123 1.125 0.38 0.373 0.376 0.16 3 1/4 4 5.63 6.38 (97.21) (97.26) (273.05) (28.70) (28.52) (28.58) (9.65) (9.47) (9.55) (4.06) (143.00) (162.05) 5 4.249 4.251 12 1.25 1.248 1.250 0.44 0.434 0.437 0.19 3 3/4 4 6.38 7.13 (107.92) (107.98) (304.80) (31.75) (31.70) (31.75) (11.18) (11.02) (11.10) (4.8
43、3) (162.05) (181.10) 5.5 4.671 4.673 13.25 1.25 1.248 1.250 0.44 0.435 0.438 0.19 4 4 6.75 7.75 (118.64) (118.69) (336.55) (31.75) (31.70) (31.75) (11.18) (11.05) (11.13) (4.83) (171.45) (196.85) 6 4.791 4.793 14.5 1.38 1.373 1.375 0.5 0.493 0.496 0.22 4 1/4 4 7.5 8.5 (121.69) (121.74) (368.30) (35.
44、05) (34.87) (34.93) (12.70) (12.52) (12.60) (5.59) (190.50) (215.90) 6.5 5.187 5.189 15.75 1.38 1.373 1.375 0.5 0.494 0.497 0.22 4 1/2 4 8.25 9.25 (131.75) (131.80) (400.05) (35.05) (34.87) (34.93) (12.70) (12.55) (12.62) (5.59) (209.55) (234.95) 7 5.582 5.584 17 1.5 1.498 1.500 0.56 0.555 0.558 0.2
45、5 5 4 9 10 (141.78) (141.83) (431.80) (38.10) (38.05) (38.10) (14.22) (14.10) (14.17) (6.35) (228.60) (254.00) 7.5 5.978 5.980 18.25 1.5 1.498 1.500 0.56 0.556 0.559 0.25 5 1/2 4 9.38 10.38 (151.84) (151.89) (463.55) (38.10) (38.05) (38.10) (14.22) (14.12) (14.20) (6.35) (238.25) (263.65) 8 6.374 6.
46、376 19.5 1.75 1.748 1.750 0.56 0.553 0.556 0.25 5 3/4 4 9.75 10.75 (161.90) (161.95) (495.30) (44.45) (44.40) (44.45) (14.22) (14.05) (14.12) (6.35) (247.65) (273.05) 1. A steel shaft may be used in salt water if a suitable aft Fairwater is used. 2. Keyway shall be cut parallel to taper. 3. Threads
47、are Unified and American Standard, Class 3A. SAE INTERNATIONAL J755 Reaffirmed MAY2015 Page 6 of 9 TABLE 4 - DIMENSIONS FOR SHAFTS FROM 3-1/4 in (83 mm) TO 8 in (203 mm) IN DIAMETER(1)(CONTINUED) Nominal Shaft Dia, A Undercut J Undercut K Dia of Pin End L Length of Pin End, M Cotter Pin Hole N Cotte
48、r Pin Hole P (Drill) Cotter Pin Q Nominal Dia Cotter Pin Q Length Nuts(2) Size Nuts(2)Plain Thickness T Nuts(2)Jam Thickness W Sleeve Dia(3) U Min Sleeve Dia(3) U Max Clearance Z Keyway X 3.25 2.13 0.38 2.13 0.75 4.58 0.39 0.38 3 2-1/24 2.5 1.5 3.870 3.872 0.38 8.5 (82.55) (54.10) (9.65) (54.10) (19.05) (116.33) (9.91) (9.65) (76.20) (63.50) (38.10) (98.30) (98.35) (9.65) (215.90) 3.5 2.13 0.38 2.13 0.75 4.58 0.39 0.38 3 2-1/24 2.5 1.5 4.120 4.122 0.38 9.25 (88.90) (54.10) (9.65) (54.10) (19.05) (116.33) (9.91) (9.65) (76.20) (63.50) (38.10) (104.65) (104.70) (9.65) (234.9
