Stock Helical Gears

45° Helix Angle

Hardened Steel

Right or Left Hand

  • 1/4″ Face
  • 24 Diameter Pitch
  • 33.94 Normal Pitch
Number of Teeth Pitch diameter Outside Diameter Stock Bore Keyway Catalog Number
Right Hand Left Hand
8 .333″ .391″ .187″ On End HZ-2408-R HZ-2408-L
12 .500″ .558″ .250″ On End HZ-2412-R HZ-2412-L
16 .666″ .724″ .250″ On End HZ-2416-R HZ-2416-L
18 .750″ .808″ .375″ 1/16″ HZ-2418-R HZ-2418-L
24 1.000″ 1.058″ .500″ 1/8″ HZ-2424-R HZ-2424-L
36 1.500″ 1.558″ .500″ 1/8″ HZ-2436-R HZ-2436-L
40 1.666″ 1.724″ .500″ 1/8″ HZ-2440-R HZ-2440-L
48 2.000″ 2.058″ .500″ 1/8″ HZ-2448-R HZ-2448-L
  • 3/8″ Face
  • 20 Diameter Pitch
  • 28.28 Normal Pitch
Number of Teeth Pitch diameter Outside Diameter Stock Bore Keyway Catalog Number
Right Hand Left Hand
8 .400″ .470″ .250″ On End HZ-2008-R HZ-2008-L
10 .500″ .570″ .250″ On End HZ-2010-R HZ-2010-L
15 .750″ .820″ .437″ 1/16″ HZ-2015-R HZ-2015-L
20 1.000″ 1.070″ .500″ 1/8″ HZ-2020-R HZ-2020-L
25 1.250″ 1.320″ .625″ 3/16″ HZ-2025-R HZ-2025-L
30 1.500″ 1.570″ .750″ 3/16″ HZ-2030-R HZ-2030-L
35 1.750″ 1.820″ .750″ 3/16″ HZ-2035-R HZ-2035-L
40 2.000″ 2.070″ .750″ 3/16″ HZ-2040-R HZ-2040-L
60 3.000″ 3.070″ .750″ 3/16″ HZ-2060-R HZ-2060-L
  • 1/2″ Face
  • 16 Diameter Pitch
  • 22.63 Normal Pitch
Number of Teeth Pitch diameter Outside Diameter Stock Bore Keyway Catalog Number
Right Hand Left Hand
8 .500″ .588″ .250″ On End HZ-1608-R HZ-1608-L
12 .750″ .838″ .375″ 1/8″ HZ-1612-R HZ-1612-L
16 1.000″ 1.088″ .500″ 1/8″ HZ-1616-R HZ-1616-L
20 1.250″ 1.338″ .500″ 1/8″ HZ-1620-R HZ-1620-L
24 1.500″ 1.588″ .500″ 1/8″ HZ-1624-R HZ-1624-L
32 2.000″ 2.088″ .500″ 1/8″ HZ-1632-R HZ-1632-L
40 2.500″ 2.588″ .500″ 1/8″ HZ-1640-R HZ-1640-L
48 3.000″ 3.088″ .500″ 1/8″ HZ-1648-R HZ-1648-L
  • 3/4″ Face
  • 12 Diameter Pitch
  • 16.97 Normal Pitch
Number of Teeth Pitch diameter Outside Diameter Stock Bore Keyway Catalog Number
Right Hand Left Hand
10 .833″ .951″ .500″ 1/8″ HZ-1210-R HZ-1210-L
12 1.000″ 1.118″ .625″ 3/16″ HZ-1212-R HZ-1212-L
15 1.250″ 1.368″ .625″ 3/16″ HZ-1215-R HZ-1215-L
18 1.500″ 1.618″ .625″ 3/16″ HZ-1218-R HZ-1218-L
21 1.750″ 1.868″ .625″ 3/16″ HZ-1221-R HZ-1221-L
24 2.000″ 2.118″ .625″ 3/16″ HZ-1224-R HZ-1224-L
30 2.500″ 2.618″ .750″ 3/16″ HZ-1230-R HZ-1230-L
36 3.000″ 3.118″ .750″ 3/16″ HZ-1236-R HZ-1236-L
48 4.000″ 4.118″ .750″ 3/16″ HZ-1248-R HZ-1248-L
  • 7/8″ Face
  • 10 Diameter Pitch
  • 14.14 Normal Pitch
Number of Teeth Pitch diameter Outside Diameter Stock Bore Keyway Catalog Number
Right Hand Left Hand
10 1.000″ 1.140″ .500″ 1/8″ HZ-1010-R HZ-1010-L
15 1.500″ 1.640″ .500″ 1/8″ HZ-1015-R HZ-1015-L
20 2.000″ 2.140″ .750″ 3/16″ HZ-1020-R HZ-1020-L
25 2.500″ 2.640″ .750″ 3/16″ HZ-1025-R HZ-1025-L
30 3.000″ 3.140″ .750″ 3/16″ HZ-1030-R HZ-1030-L
40 4.000″ 4.140″ .750″ 3/16″ HZ-1040-R HZ-1040-L
  • 1″ Face
  • 8 Diameter Pitch
  • 11.31 Normal Pitch
Number of Teeth Pitch diameter Outside Diameter Stock Bore Keyway Catalog Number
Right Hand Left Hand
10 1.250″ 1.426″ .625″ 3/16″ HZ-810-R HZ-810-L
12 1.500″ 1.676″ .750″ 3/16″ HZ-812-R HZ-812-L
16 2.000″ 2.176″ .875″ 3/16″ HZ-816-R HZ-816-L
20 2.500″ 2.676″ .875″ 3/16″ HZ-820-R HZ-820-L
24 3.000″ 3.176″ .875″ 3/16″ HZ-824-R HZ-824-L
32 4.000″ 4.176″ .875″ 3/16″ HZ-832-R HZ-832-L
36 4.500″ 4.676″ 1.000″ 1/4″ HZ-836-R HZ-836-L
40 5.000″ 5.176″ 1.000″ 1/4″ HZ-840-R HZ-840-L
  • 1-1/4″ Face
  • 6 Diameter Pitch
  • 8.48 Normal Pitch
Number of Teeth Pitch diameter Outside Diameter Stock Bore Keyway Catalog Number
Right Hand Left Hand
9 1.500″ 1.736″ .750″ 3/16″ HZ-609-R HZ-609-L
12 2.000″ 2.236″ .750″ 3/16″ HZ-612-R HZ-612-L
15 2.500″ 2.736″ .750″ 3/16″ HZ-615-R HZ-615-L
18 3.000″ 3.236″ 1.000″ 1/4″ HZ-618-R HZ-618-L
24 4.000″ 4.236″ 1.000″ 1/4″ HZ-624-R HZ-624-L
30 5.000″ 5.236″ 1.000″ 1/4″ HZ-630-R HZ-630-L
36 6.000″ 6.236″ 1.000″ 1/4″ HZ-636-R HZ-636-L