Question

38" B C .480 12-2 Drive Pulley. .3281 +10 1885 5.000 +.002 Machine Trades Print Reading .500 .0938 HE LOCO o 01.5625 0 2.30 .752 .751 R.0156 .2187 .4375 0.257 .6563 16-18 UNC-2B B NOTE: MODIFY PURCHASED CASTING NICKEL PLATE AS PER SPECIFICATION "106A" DRAWN BY: DATE COMPANY INTERPRET DIMENSIONS AND TOLERANCES PER ASME Y14.5 - 2009. MB 10/22 11/2 CHECKED BY DATE UNSPECIFIED TOLERENCES R.G. APPROVED BY DATE G & B DESIGNS FRANKLIN, WISCONSIN DRIVE PULLEY TITLE Copyright Goodheart-Willcox Co., In Goodheart-Willcox Publisher PARTS MUST BE FREE OF ALL SHARP EDGES, BURRS, FLASH AND CLEAN. PART NO. TO BE STEEL STAMPED WITH 1/16 TO 1/8 HIGH CHARACTERS ON ALL PARTS, BARS, PLATES, ETC. PARTS MAY BE SAW CUT AND SANDED UNLESS OTHERWISE SPECIFIED XX = 1.010 XXX = 1.005 ANGLES = 1.5° MATERIAL NO THIRD ANGLE PROJECTION DRAWING NO REV MATERIAL DESCRIPTION SIZE CAGE CODE A SCALE 2:1 B200 DO NOT SCALE DRAWING WEIGHT: SHEET 1 of 1

Answer 1

1. Drive pulley groove is .480 inches wide at the outside

2. Hub of the pulley is .4375 inches wide

3. pulley keyway is .1885 inches wide

4. pulley groove is .500 inches deep

5. maximum outside diameter of the pulley is 2.30 inches

6. dimension A is 2.30 - (2*.500) = 1.3 inches

7. threaded hole is (1.5625 - .750) / 2 = 0.4062 inches long

8. dimension B is .6563 + .4375 = 1.0938 inches

9. length of the keyway is .6563 + .4375 - .0938 = 1 inches

10. material of the pulley is 106A

11. groove angle is 38°

12. diameter of the pulley hub is 1.5625 inches

13. lower limit of the hole with the keyway is .751 inches

14. Please refer the image below to see the projection of hidden circle

38" с 480 .3281 .1885 +.002 .000 .500 .09384 TE o 01.5625 02.30 .752 753 R.0156 .2187 +.4375 .6563 0.257 5-18 UNC-2B 16 B NOTE: MODIFY PURCHASED CASTING NICKEL PLATE AS PER SPECIFICATION "106A"

15. tapped hole from the end of the hub is .2187 inches far

16. revision A is .2187 inches

17. Nickel plating finish is required on the pulley

18. Unilateral tolerance is specified for the keyway

19. maximum dimension from the center of the pulley to the bottom of the keyway is .847 - (.751 /2) = 0.4715 inches

20. dimension C is .480 / 2 = 0.24 inches