MISUMI WEBINDEX

366 TECHNICAL INFORMATION Cautions on Use of Belt QHow to Extend Belt When the belt is too taut, its service life can be shortened, while when it is not taut enough, the belt may (jump off) the groove of the pulley due to an activating torque or shock load. Keep the belt stationary and optimize its tautness. The warp load necessary to provide the optimum tautness can be calculated from values representing the belt, its width and the span in equation A below. Apply deflection load between max. value and recommended value. Td t A B Ø C (Inter-shaft Distance) t×Y Ti+ Lp Td= ················································ Equation A 16 Td: Load N Needed for Deflection d at the Center of Span t Ti : Initial Tension N From Table 31 Lp : Length of the Belt (mm) Y : Correction Coefficient From Table 31 C : Inter-shaft Distance (mm) : Deflection (mm) =0.016t dp : Diameter of the Pitch Circle of the Small Pulley (mm) t : Span Length (mm) Dp : Diameter of the Pitch Circle of the Large Pulley (mm) (Dp−dp)2 t= C2− 4 Table 32. Initial Tension (Ti) and Correction Coefficient (Y) Belt Nominal Width 019 025 031 037 050 075 100 150 200 Type Ti·Y Belt Width mm 4.8 6.4 7.9 9.5 12.7 19.1 25.4 38.1 50.8 MXL Ti (N) Max. Value Recommended Value − − − − − 9.8 13.7 21.6 29.9 5.8 8.2 12.9 18.0 Coefficient Y − − − − − − − − − XL Ti (N) Max. Value Recommended Value − − − − − 29 37 44 67 18 25 32 51 Coefficient Y − 3.8 5.4 7.6 11.8 − − − − L Ti (N) Max. Value Recommended Value − − − − − 76 125 175 273 52 87 123 191 Coefficient Y − − − − 44.1 75.5 107 165 − H Ti (N) Max. Value Recommended Value − − − − − 293 421 646 889 222 312 486 668 Coefficient Y − − − − − 142 205 317 423 Belt Nominal Width 60 100 150 250 Type Ti·Y Belt Width mm 6 10 15 25 P2M Ti (N) Max. Value Recommended Value − − − 13 9.8 Coefficient Y 0.9 − − − P3M Ti (N) Max. Value Recommended Value − − 46 74 34 55 Coefficient Y − 1.9 3.0 − P5M Ti (N) Max. Value Recommended Value − − 147 225.4 107.8 166.6 Coefficient Y − 56.9 82.4 − P8M Ti (N) Max. Value Recommended Value − − 294 509.6 225.4 382.2 Coefficient Y − − 135 239 Belt Nominal Width 40 60 100 150 250 300 400 600 Type Ti·Y Belt Width mm 4 6 101525304060 S2M Ti (N) Max. Value Recommended Value − − − − − 7.8 12.7 22.6 5.9 9.8 16.7 Coefficient Y 9.8 15.7 27.4 − − − − − S3M Ti (N) Max. Value Recommended Value − − − − − 26 46 73 20 34 54 Coefficient Y − 26.5 46.1 75.5 − − − − S5M Ti (N) Max. Value Recommended Value − − − − − 77 124 221 58 93 166 Coefficient Y − − 52.8 85.5 151.0 − − S8M MTS8M Ti (N) Max. Value Recommended Value − − − 294 510 628 873 226 382 470 657 Coefficient Y − − − 98 196 235 333 S14M Ti (N) Max. Value Recommended Value − − − − − − 1226 1108 1912 1726 Coefficient Y − − − − − −6861059 Belt Nominal Width 100 150 200 250 300 400 500 Type Ti·Y Belt Width mm 10 15 20 25 30 40 50 T5 Ti (N) Max. Value Recommended Value − − − 37.3 59 85 106 24.5 39 59 74 Coefficient Y 16.7 26.5 38.2 47.5 − − − T10 Ti (N) Max. Value Recommended Value − 162 235 294 363 500 628 108 157 196 245 333 422 Coefficient Y − 71.6 104.9 130.4 163.8 222.6 281.5 Belt Nominal Width 4 6 9 12152025 Type Ti·Y Belt Width mm 4 6 9 12152025 2GT Ti (N) Max. Value Recommended Value 12.2 20.5 32.8 − − − − 9.4 15.8 25.2 Coefficient Y − − − − − − − 3GT Ti (N) Max. Value Recommended Value − 38 57 − 96 − − 29 44 74 Coefficient Y − − − − − − − EV5GT Ti (N) Max. Value Recommended Value − − 92 127 163 − − 71 98 125 Coefficient Y − − − − − − − EV8YU Ti (N) Max. Value Recommended Value − − − − 273 364 455 210 280 350 Coefficient Y − − − − − − −

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