Custom Machine and Tool
Home | Products Catalog | Concentric Maxi Torque | Pulley Stock Program
Manufacturing Services | Online Quoting | Literature | Site Map | Contact Us | Company
 Home: Catalog: Timing Pulleys: Metric AT Style


METRIC AT STYLE
Drawings pitch
(click for dimensions)
tooth form quoting Part Number
Configuration
[6FC] [6F] [6] [6W]
[3F] [3] [pulley blank]
[AT5] [AT10] tooth form timing pulleys
timing pulley blanks
Part Number
Structure
pulley types
Type 3 Type 3F Type 6
Type 6F Type 6FC Type 6W

Metric AT Style Synchronous Timing Belt Pulleys

AT5 Pitch
AT 5mm pitch x 10mm, 16mm, and 25mm belt widths
Bore is ± 1 mm
NOTE: ALL DIMENSIONS IN MILLIMETERS.  

For 10mm Belt Widths
example of part number structure
  12-AT5-10-6F-A-6
# grooves - pitch - belt width - type - material - bore
PART NUMBER Pitch
Diam.
Pulley
O.D.
Flange
O.D.
±1/64
O.A.L Face
Width
Hub
Diam.
±1/64
12 AT5 10 6F A 6 19.25 17.85 23.0 21 15 11
14 AT5 10 6F A 6 22.45 21.05 25.0 21 15 14
15 AT5 10 6F A 6 24.05 22.65 28.0 21 15 16
16 AT5 10 6F A 6 25.60 24.20 32.0 21 15 18
18 AT5 10 6F A 6 28.80 27.40 32.0 21 15 20
19 AT5 10 6F A 6 30.40 29.00 36.0 21 15 22
20 AT5 10 6F A 6 32.00 30.60 36.0 21 15 23
22 AT5 10 6F A 6 35.25 33.85 38.0 21 15 24
24 AT5 10 6F A 6 38.40 37.00 42.0 21 15 26
25 AT5 10 6F A 6 40.00 38.60 44.0 21 15 26
26 AT5 10 6F A 6 41.60 40.20 44.0 21 15 26
27 AT5 10 6F A 8 43.20 41.80 48.0 21 15 30
28 AT5 10 6F A 8 44.75 43.35 48.0 21 15 32
30 AT5 10 6F A 8 47.95 46.55 51.0 21 15 34
32 AT5 10 6F A 8 51.10 49.70 54.0 21 15 38
36 AT5 10 6F A 8 57.45 56.05 64.0 21 15 38
40 AT5 10 6F A 8 63.85 62.45 66.5 21 15 40
42 AT5 10 6F A 8 67.00 65.60 70.0 21 15 40
44 AT5 10 6F A 8 70.20 68.80 - 21 15 45
48 AT5 10 6F A 8 76.55 75.15 - 21 15 50
60 AT5 10 6F A 8 95.65 94.25 - 21 15 65
 
For 16mm Belt Widths
example of part number structure
  12-AT5-16-6F-A-6
# grooves - pitch - belt width - type - material - bore
PART NUMBER Pitch
Diam.
Pulley
O.D.
Flange
O.D.
±1/64
O.A.L Face
Width
Hub
Diam.
±1/64
12 AT5 16 6F A 6 19.25 17.85 23.0 27 21 11
14 AT5 16 6F A 6 22.45 21.05 25.0 27 21 14
15 AT5 16 6F A 6 24.05 22.65 28.0 27 21 16
16 AT5 16 6F A 6 25.60 24.20 32.0 27 21 18
18 AT5 16 6F A 8 28.80 27.40 32.0 27 21 20
19 AT5 16 6F A 8 30.40 29.00 36.0 27 21 22
20 AT5 16 6F A 8 32.00 30.60 36.0 27 21 23
22 AT5 16 6F A 8 35.25 33.85 38.0 27 21 24
24 AT5 16 6F A 8 38.40 37.00 42.0 27 21 26
25 AT5 16 6F A 8 40.00 38.60 44.0 27 21 26
26 AT5 16 6F A 8 41.60 40.20 44.0 27 21 26
27 AT5 16 6F A 8 43.20 41.80 48.0 27 21 30
28 AT5 16 6F A 8 44.75 43.35 48.0 27 21 32
30 AT5 16 6F A 8 47.95 46.55 51.0 27 21 34
32 AT5 16 6F A 8 51.10 49.70 54.0 27 21 38
36 AT5 16 6F A 8 57.45 56.05 64.0 27 21 38
40 AT5 16 6F A 8 63.85 62.45 66.5 27 21 40
42 AT5 16 6F A 8 67.00 65.60 70.0 27 21 40
44 AT5 16 6  A 8 70.20 68.80 - 27 21 45
48 AT5 16 6  A 8 76.55 75.15 - 27 21 50
60 AT5 16 6  A 8 95.65 94.25 - 27 21 65
 
For 25mm Belt Widths
example of part number structure
  12-AT5-25-6F-A-8
# grooves - pitch - belt width - type - material - bore
PART NUMBER Pitch
Diam.
Pulley
O.D.
Flange
O.D.
±1/64
O.A.L Face
Width
Hub
Diam.
±1/64
12 AT5 25 6F A 8 19.25 17.85 23.0 36 30 11
14 AT5 25 6F A 8 22.45 21.05 25.0 36 30 14
15 AT5 25 6F A 8 24.05 22.65 28.0 36 30 16
16 AT5 25 6F A 8 25.60 24.20 32.0 36 30 18
18 AT5 25 6F A 8 28.80 27.40 32.0 36 30 20
19 AT5 25 6F A 8 30.40 29.00 36.0 36 30 22
20 AT5 25 6F A 8 32.00 30.60 36.0 36 30 23
22 AT5 25 6F A 8 35.25 33.85 38.0 36 30 24
24 AT5 25 6F A 8 38.40 37.00 42.0 36 30 26
25 AT5 25 6F A 8 40.00 38.60 44.0 36 30 26
26 AT5 25 6F A 8 41.60 40.20 44.0 36 30 26
27 AT5 25 6F A 8 43.20 41.80 48.0 36 30 30
28 AT5 25 6F A 8 44.75 43.35 48.0 36 30 32
30 AT5 25 6F A 8 47.95 46.55 51.0 36 30 34
32 AT5 25 6F A 8 51.10 49.70 54.0 36 30 38
36 AT5 25 6F A 8 57.45 56.05 64.0 36 30 38
40 AT5 25 6F A 8 63.85 62.45 66.5 36 30 40
42 AT5 25 6F A 8 67.00 65.60 70.0 36 30 40
44 AT5 25 6  A 8 70.20 68.80 - 36 30 45
48 AT5 25 6  A 8 76.55 75.15 - 36 30 50
60 AT5 25 6  A 8 95.65 94.25 - 36 30 65

AT10 Pitch
AT 5mm pitch x 16mm, 25mm, 32mm, and 50mm belt widths
Bore is ± 1 mm.
NOTE: ALL DIMENSIONS IN MILLIMETERS.  

For 16mm Belt Widths
example of part number structure
  15-AT10-16-6F-A-8
# grooves - pitch - belt width - type - material - bore
PART NUMBER Pitch
Diam.
Pulley
O.D.
Flange
O.D.
±1/64
O.A.L Face
Width
Hub
Diam.
±1/64
15 AT10 16 6F A  8 47.90 45.90 51 31 21 32
16 AT10 16 6F A  8 51.05 49.05 54 31 21 35
18 AT10 16 6F A  8 57.45 55.45 60 31 21 40
19 AT10 16 6F A  8 60.60 58.60 66.5 31 21 44
20 AT10 16 6F A  8 63.80 61.80 66.5 31 21 46
22 AT10 16 6F A  8 70.15 68.15 75 31 21 52
24 AT10 16 6F A  8 76.55 74.55 83 31 21 58
25 AT10 16 6F A  8 79.70 77.70 83 31 21 60
26 AT10 16 6F A  8 82.90 80.90 87 31 21 60
27 AT10 16 6F A  8 86.10 84.10 91 31 21 60
28 AT10 16 6F A  8 89.25 87.25 93 31 21 60
30 AT10 16 6F A  8 95.65 93.65 97 31 21 60
32 AT10 16 6F A 10 102.00 100.00 106 31 21 65
36 AT10 16 6F A 10 114.75 112.75 119 31 21 70
40 AT10 16 6F A 10 127.45 125.45 131 31 21 80
44 AT10 16 6F A 10 140.20 138.20 - 31 21 88
48 AT10 16 6F A 10 152.95 150.95 - 31 21 95
60 AT10 16 6F A 10 191.10 189.10 - 31 21 110
 
For 25mm Belt Widths
example of part number structure
  15-AT10-25-6F-A-8
# grooves - pitch - belt width - type - material - bore
PART NUMBER Pitch
Diam.
Pulley
O.D.
Flange
O.D.
±1/64
O.A.L Face
Width
Hub
Diam.
±1/64
15 AT10 25 6F A  8 47.90 45.90 51 40 30 32
16 AT10 25 6F A  8 51.05 49.05 54 40 30 35
18 AT10 25 6F A  8 57.45 55.45 60 40 30 40
19 AT10 25 6F A  8 60.60 58.60 66.5 40 30 44
20 AT10 25 6F A  8 63.80 61.80 66.5 40 30 46
22 AT10 25 6F A  8 70.15 68.15 75 40 30 52
24 AT10 25 6F A  8 76.55 74.55 83 40 30 58
25 AT10 25 6F A  8 79.70 77.70 83 40 30 60
26 AT10 25 6F A  8 82.90 80.90 87 40 30 60
27 AT10 25 6F A  8 86.10 84.10 91 40 30 60
28 AT10 25 6F A  8 89.25 87.25 93 40 30 60
30 AT10 25 6F A  8 95.65 93.65 97 40 30 60
32 AT10 25 6F A 10 102.00 100.00 106 40 30 65
36 AT10 25 6F A 10 114.75 112.75 119 40 30 70
40 AT10 25 6F A 10 127.45 125.45 131 40 30 80
44 AT10 25 6  A 10 140.20 138.20 - 40 30 88
48 AT10 25 6  A 10 152.95 150.95 - 40 30 95
60 AT10 25 6  A 10 191.10 189.10 - 40 30 110
 
For 32mm Belt Widths
example of part number structure
  18-AT10-32-6F-A-10
# grooves - pitch - belt width - type - material - bore
PART NUMBER Pitch
Diam.
Pulley
O.D.
Flange
O.D.
±1/64
O.A.L Face
Width
Hub
Diam.
±1/64
18 AT10 32 6F A 10 57.45 55.45 60 47 37 40
19 AT10 32 6F A 10 60.60 58.60 66.5 47 37 44
20 AT10 32 6F A 12 63.80 61.80 66.5 47 37 46
22 AT10 32 6F A 12 70.15 68.15 75 47 37 52
24 AT10 32 6F A 12 76.55 74.55 83 47 37 58
25 AT10 32 6F A 12 79.70 77.70 83 47 37 60
26 AT10 32 6F A 12 82.90 80.90 87 47 37 60
27 AT10 32 6F A 12 86.10 84.10 91 47 37 60
28 AT10 32 6F A 12 89.25 87.25 93 47 37 60
30 AT10 32 6F A 12 95.65 93.65 97 47 37 60
32 AT10 32 6F A 12 102.00 100.00 106 47 37 65
36 AT10 32 6F A 16 114.75 112.75 119 47 37 70
40 AT10 32 6F A 16 127.45 125.45 131 47 37 80
44 AT10 32 6  A 16 140.20 138.20 - 47 37 88
48 AT10 32 6  A 16 152.95 150.95 - 47 37 95
60 AT10 32 6  A 16 191.10 189.10 - 47 37 110
 
For 50mm Belt Widths
example of part number structure
  18-AT10-50-6F-A-10
# grooves - pitch - belt width - type - material - bore
PART NUMBER Pitch
Diam.
Pulley
O.D.
Flange
O.D.
±1/64
O.A.L Face
Width
Hub
Diam.
±1/64
18 AT10 50 6F A 10 57.45 55.45 60 66 56 40
19 AT10 50 6F A 10 60.60 58.60 66.5 66 56 44
20 AT10 50 6F A 12 63.80 61.80 66.5 66 56 46
22 AT10 50 6F A 12 70.15 68.15 75 66 56 52
24 AT10 50 6F A 12 76.55 74.55 83 66 56 58
25 AT10 50 6F A 12 79.70 77.70 83 66 56 60
26 AT10 50 6F A 12 82.90 80.90 87 66 56 60
27 AT10 50 6F A 12 86.10 84.10 91 66 56 60
28 AT10 50 6F A 12 89.25 87.25 93 66 56 60
30 AT10 50 6F A 12 95.65 93.65 97 66 56 60
32 AT10 50 6F A 12 102.00 100.00 106 66 56 65
36 AT10 50 6F A 16 114.75 112.75 119 66 56 70
40 AT10 50 6F A 16 127.45 125.45 131 66 56 80
44 AT10 50 6  A 16 140.20 138.20 - 66 56 88
48 AT10 50 6  A 16 152.95 150.95 - 66 56 95
60 AT10 50 6  A 16 191.10 189.10 - 66 56 110

Part Number Structure
part number configuration, definitions, and conversions
[Part Number]
# Grooves
Use any suitable number of grooves.
ex: 12 or 18
Pitch
RMA/MPTA Pitch Designation.
.080" = MXL
.200" = XL
.375" = L
.500" = H
Belt Width
Belt width expressed according to MPTA/RMA IP-24 standard.
3/8" = .375 = 037
1/2" = .500 = 050
1-1/2" = 1.500 = 150
Type
See drawings for type design.
6FC, 6F, 6, 6W, 3F, or 3
Material
Steel = S, or Aluminum = A
Bore
Bore dimensions expressed in decimal inches.
1/8" = .125 = 125
1/2" = .500 = 500
3/4" = .750 = 750