Metric Curvelinear Synchronous Timing Belt Pulleys

3mm HTD Pitch
For 6mm & 9mm Belt Widths
Other belt widths and bore sizes available.
Includes two set screws at 90º centered in face.
NOTE: ALL DIMENSIONS IN INCHES.  

For 6mm Belt Widths
example of part number structure   10-3M-06-6FC-A-125 # 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
10 3M 06 6FC A 125	.376	.346	.505	.562	.327	.505
11 3M 06 6FC A 125	.414	.384	.530	.562	.327	.530
12 3M 06 6FC A 187	.451	.421	.580	.562	.327	.580
13 3M 06 6FC A 187	.489	.459	.610	.572	.334	.610
14 3M 06 6FC A 187	.526	.496	.635	.572	.334	.635
15 3M 06 6FC A 187	.564	.534	.685	.572	.334	.685
16 3M 06 6FC A 187	.602	.572	.710	.572	.334	.710
17 3M 06 6FC A 187	.639	.609	.740	.572	.334	.740
18 3M 06 6F  A 250	.677	.647	.790	.691	.386	.442
19 3M 06 6F  A 250	.714	.684	.815	.691	.386	.468
20 3M 06 6F  A 250	.752	.722	.895	.691	.386	.500
22 3M 06 6F  A 250	.827	.797	.945	.691	.386	.562
24 3M 06 6F  A 250	.902	.872	1.025	.691	.386	.625
25 3M 06 6F  A 250	.940	.910	1.060	.691	.386	.625
26 3M 06 6F  A 250	.977	.947	1.105	.691	.386	.625
28 3M 06 6F  A 250	1.053	1.023	1.173	.691	.386	.701
30 3M 06 6F  A 250	1.128	1.098	1.250	.691	.386	.776
32 3M 06 6F  A 250	1.203	1.173	1.323	.691	.386	.851
34 3M 06 6F  A 250	1.278	1.248	1.398	.713	.407	.921
36 3M 06 6F  A 250	1.353	1.323	1.473	.713	.407	1.000
38 3M 06 6F  A 250	1.429	1.399	1.549	.713	.407	1.075
40 3M 06 6F  A 250	1.504	1.474	1.625	.713	.407	1.150
44 3M 06 6F  A 250	1.654	1.624	1.775	.713	.407	1.300
For 6mm Belt Widths
example of part number structure   18-3M-06-6-A-250 # 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 3M 06 6 A 250	.677	.647	-	.691	.386	.442
19 3M 06 6 A 250	.714	.684	-	.691	.386	.468
20 3M 06 6 A 250	.752	.722	-	.691	.386	.500
22 3M 06 6 A 250	.827	.797	-	.691	.386	.562
24 3M 06 6 A 250	.902	.872	-	.691	.386	.625
25 3M 06 6 A 250	.940	.910	-	.691	.386	.625
26 3M 06 6 A 250	.977	.947	-	.691	.386	.625
28 3M 06 6 A 250	1.053	1.023	-	.691	.386	.701
30 3M 06 6 A 250	1.128	1.098	-	.691	.386	.776
32 3M 06 6 A 250	1.203	1.173	-	.691	.386	.851
34 3M 06 6 A 250	1.278	1.248	-	.713	.407	.921
36 3M 06 6 A 250	1.353	1.323	-	.713	.407	1.000
38 3M 06 6 A 250	1.429	1.399	-	.713	.407	1.075
40 3M 06 6 A 250	1.504	1.474	-	.713	.407	1.150
44 3M 06 6 A 250	1.654	1.624	-	.713	.407	1.300
48 3M 06 6 A 312	1.805	1.775	-	.734	.407	1.250
50 3M 06 6 A 312	1.880	1.850	-	.734	.407	1.250
56 3M 06 6 A 312	2.105	2.075	-	.734	.407	1.250
60 3M 06 6 A 312	2.256	2.226	-	.734	.407	1.250
62 3M 06 6 A 312	2.331	2.301	-	.734	.407	1.250
72 3M 06 6 A 312	2.707	2.677	-	.734	.407	1.250
For 9mm Belt Widths
example of part number structure   10-3M-09-6FC-A-125 # 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
10 3M 09 6FC A 125	.376	.346	.505	.681	.446	.505
11 3M 09 6FC A 125	.414	.384	.530	.681	.446	.530
12 3M 09 6FC A 187	.451	.421	.580	.681	.446	.580
13 3M 09 6FC A 187	.489	.459	.610	.691	.453	.610
14 3M 09 6FC A 187	.526	.496	.635	.691	.453	.635
15 3M 09 6FC A 187	.564	.534	.685	.691	.453	.685
16 3M 09 6FC A 187	.602	.572	.710	.691	.453	.710
17 3M 09 6FC A 187	.639	.609	.740	.691	.453	.740
18 3M 09 6F  A 250	.677	.647	.790	.812	.506	.442
19 3M 09 6F  A 250	.714	.684	.815	.812	.506	.468
20 3M 09 6F  A 250	.752	.722	.895	.812	.506	.500
22 3M 09 6F  A 250	.827	.797	.945	.812	.506	.562
24 3M 09 6F  A 250	.902	.872	1.025	.812	.506	.625
25 3M 09 6F  A 250	.940	.910	1.060	.812	.506	.625
26 3M 09 6F  A 250	.977	.947	1.105	.812	.506	.625
28 3M 09 6F  A 250	1.053	1.023	1.173	.812	.506	.701
30 3M 09 6F  A 250	1.128	1.098	1.250	.812	.506	.776
32 3M 09 6F  A 250	1.203	1.173	1.323	.812	.506	.851
34 3M 09 6F  A 250	1.278	1.248	1.398	.833	.527	.921
36 3M 09 6F  A 250	1.353	1.323	1.473	.833	.527	1.000
38 3M 09 6F  A 250	1.429	1.399	1.549	.833	.527	1.075
40 3M 09 6F  A 250	1.504	1.474	1.625	.833	.527	1.150
44 3M 09 6F  A 250	1.654	1.624	1.775	.833	.527	1.300
For 9mm Belt Widths
example of part number structure   18-3M-09-6-A-250 # 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 3M 09 6 A 250	.677	.647	-	.812	.506	.442
19 3M 09 6 A 250	.714	.684	-	.812	.506	.468
20 3M 09 6 A 250	.752	.722	-	.812	.506	.500
22 3M 09 6 A 250	.827	.797	-	.812	.506	.562
24 3M 09 6 A 250	.902	.872	-	.812	.506	.625
25 3M 09 6 A 250	.940	.910	-	.812	.506	.625
26 3M 09 6 A 250	.977	.947	-	.812	.506	.625
28 3M 09 6 A 250	1.053	1.023	-	.812	.506	.701
30 3M 09 6 A 250	1.128	1.098	-	.812	.506	.776
32 3M 09 6 A 250	1.203	1.173	-	.812	.506	.851
34 3M 09 6 A 250	1.278	1.248	-	.834	.527	.921
36 3M 09 6 A 250	1.353	1.323	-	.834	.527	1.000
38 3M 09 6 A 250	1.429	1.399	-	.834	.527	1.075
40 3M 09 6 A 250	1.504	1.474	-	.834	.527	1.150
44 3M 09 6 A 250	1.654	1.624	-	.834	.527	1.300
48 3M 09 6 A 312	1.805	1.775	-	.875	.500	1.250
50 3M 09 6 A 312	1.880	1.850	-	.875	.500	1.250
56 3M 09 6 A 312	2.105	2.075	-	.875	.500	1.250
60 3M 09 6 A 312	2.256	2.226	-	.875	.500	1.250
62 3M 09 6 A 312	2.331	2.301	-	.875	.500	1.250
72 3M 09 6 A 312	2.707	2.667	-	.875	.500	1.250

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5mm HTD Pitch
For 9mm & 15mm Belt Widths
Other belt widths and bore sizes available.
Includes two set screws at 90º centered in face.
NOTE: ALL DIMENSIONS IN INCHES.  

For 9mm Belt Widths
example of part number structure   12-5M-09-6F-A-250 # 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 5M 09 6F A 250	.752	.707	7/8	.790	.540	7/16
13 5M 09 6F A 250	.815	.770	15/16	.790	.540	1/2
14 5M 09 6F A 250	.877	.832	1	.790	.540	1/2
15 5M 09 6F A 250	.940	.895	1-1/16	.790	.540	9/16
16 5M 09 6F A 250	1.003	.958	1-3/32	.790	.540	9/16
17 5M 09 6F A 250	1.065	1.020	1-3/16	.790	.540	5/8
18 5M 09 6F A 250	1.128	1.083	1-1/4	.790	.540	11/16
19 5M 09 6F A 250	1.191	1.146	1-5/16	.790	.540	3/4
20 5M 09 6F A 250	1.253	1.208	1-3/8	.790	.540	13/16
22 5M 09 6F A 250	1.379	1.334	1-1/2	.790	.540	15/16
24 5M 09 6F A 250	1.504	1.459	1-5/8	.852	.540	1
25 5M 09 6F A 250	1.566	1.521	1-1/11	.852	.540	1
26 5M 09 6F A 250	1.629	1.584	1-3/4	.852	.540	1-1/16
28 5M 09 6F A 250	1.754	1.709	1-7/8	.852	.540	1-3/16
30 5M 09 6F A 250	1.880	1.835	2	.852	.540	1-3/16
32 5M 09 6F A 250	2.005	1.960	2-1/8	.852	.540	1-1/4
34 5M 09 6F A 250	2.130	2.085	2-1/4	.852	.540	1-3/8
For 9mm Belt Widths
example of part number structure   12-5M-09-6-A-250 # 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 5M 09 6 A 250	.752	.707	-	.796	.546	7/16
13 5M 09 6 A 250	.815	.770	-	.796	.546	1/2
14 5M 09 6 A 250	.877	.832	-	.796	.546	1/2
15 5M 09 6 A 250	.940	.895	-	.796	.546	9/16
16 5M 09 6 A 250	1.003	.958	-	.796	.546	9/16
17 5M 09 6 A 250	1.065	1.020	-	.796	.546	5/8
18 5M 09 6 A 250	1.128	1.083	-	.796	.546	11/16
19 5M 09 6 A 250	1.191	1.146	-	.796	.546	3/4
20 5M 09 6 A 250	1.253	1.208	-	.796	.546	13/16
22 5M 09 6 A 250	1.379	1.334	-	.796	.546	15/16
24 5M 09 6 A 250	1.504	1.459	-	.859	.546	1
25 5M 09 6 A 250	1.566	1.521	-	.859	.546	1
26 5M 09 6 A 250	1.629	1.584	-	.859	.546	1-1/16
28 5M 09 6 A 250	1.754	1.709	-	.859	.546	1-3/16
30 5M 09 6 A 250	1.880	1.835	-	.859	.546	1-3/16
32 5M 09 6 A 250	2.005	1.960	-	.859	.546	1-1/4
34 5M 09 6 A 250	2.130	2.085	-	.859	.546	1-3/8
36 5M 09 6 A 312	2.256	2.211	-	.937	.546	1-1/2
38 5M 09 6 A 312	2.381	2.336	-	.937	.546	1-1/2
40 5M 09 6 A 312	2.506	2.461	-	.937	.546	1-1/2
44 5M 09 6 A 312	2.757	2.712	-	.937	.546	1-1/2
48 5M 09 6 A 375	3.008	2.963	-	.937	.546	1-1/2
50 5M 09 6 A 375	3.133	3.088	-	.937	.546	1-1/2
56 5M 09 6 A 375	3.509	3.464	-	.937	.546	1-1/2
60 5M 09 6 A 375	3.760	3.715	-	.937	.546	1-1/2
62 5M 09 6 A 375	3.885	3.840	-	.937	.546	1-1/2
70 5M 09 6 A 375	4.386	4.341	-	.937	.546	1-1/2
72 5M 09 6 A 375	4.511	4.466	-	.937	.546	1-1/2
For 15mm Belt Widths
example of part number structure   12-5M-15-6F-A-250 # 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 5M 15 6F A 250	.752	.707	7/8	1.025	.750	7/16
13 5M 15 6F A 250	.815	.770	15/16	1.025	.750	1/2
14 5M 15 6F A 250	.877	.832	1	1.025	.750	1/2
15 5M 15 6F A 250	.940	.895	1-1/16	1.025	.750	9/16
16 5M 15 6F A 250	1.003	.958	1-3/32	1.025	.750	9/16
17 5M 15 6F A 250	1.065	1.020	1-3/16	1.025	.750	5/8
18 5M 15 6F A 250	1.128	1.083	1-1/4	1.025	.750	11/16
19 5M 15 6F A 250	1.191	1.146	1-5/16	1.025	.750	3/4
20 5M 15 6F A 250	1.253	1.208	1-3/8	1.025	.750	13/16
22 5M 15 6F A 250	1.379	1.334	1-1/2	1.025	.750	15/16
24 5M 15 6F A 250	1.504	1.459	1-5/8	1.087	.750	1
25 5M 15 6F A 250	1.566	1.521	1-1/11	1.087	.750	1
26 5M 15 6F A 250	1.629	1.584	1-3/4	1.087	.750	1-1/16
28 5M 15 6F A 250	1.754	1.709	1-7/8	1.087	.750	1-3/16
30 5M 15 6F A 250	1.880	1.835	2	7.087	.750	1-3/16
32 5M 15 6F A 250	2.005	1.960	2-1/8	1.087	.750	1-1/4
34 5M 15 6F A 250	2.130	2.085	2-1/4	1.087	.750	1-3/8
For 15mm Belt Widths
example of part number structure   12-5M-15-6-A-250 # 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 5M 15 6  A 250	.752	.707	-	1.032	.781	7/16
13 5M 15 6  A 250	.815	.770	-	1.032	.781	1/2
14 5M 15 6  A 250	.877	.832	-	1.032	.781	1/2
15 5M 15 6  A 250	.940	.895	-	1.032	.781	9/16
16 5M 15 6  A 250	1.003	.958	-	1.032	.781	9/16
17 5M 15 6  A 250	1.065	1.020	-	1.032	.781	5/8
18 5M 15 6  A 250	1.128	1.083	-	1.032	.781	11/16
19 5M 15 6  A 250	1.191	1.146	-	1.032	.781	3/4
20 5M 15 6  A 250	1.253	1.208	-	1.032	.781	13/16
22 5M 15 6  A 250	1.379	1.334	-	1.032	.781	15/16
24 5M 15 6  A 250	1.504	1.459	-	1.093	.781	1
25 5M 15 6  A 250	1.566	1.521	-	1.093	.781	1
26 5M 15 6  A 250	1.629	1.584	-	1.093	.781	1-1/16
28 5M 15 6  A 250	1.754	1.709	-	1.093	.781	1-3/16
30 5M 15 6  A 250	1.880	1.835	-	1.093	.781	1-3/16
32 5M 15 6  A 250	2.005	1.960	-	1.093	.781	1-1/4
34 5M 15 6  A 250	2.130	2.085	-	1.093	.781	1-3/8
36 5M 15 6  A 312	2.256	2.211	-	1.187	.781	1-1/2
38 5M 15 6  A 312	2.381	2.336	-	1.187	.781	1-1/2
40 5M 15 6  A 312	2.506	2.461	-	1.187	.781	1-1/2
44 5M 15 6W A 312	2.757	2.712	-	1.187	.781	1-1/2
48 5M 15 6W A 375	3.008	2.963	-	1.187	.781	1-1/2
50 5M 15 6W A 375	3.133	3.088	-	1.187	.781	1-1/2
56 5M 15 6W A 375	3.509	3.464	-	1.187	.781	1-1/2
60 5M 15 6W A 375	3.760	3.715	-	1.187	.781	1-1/2
62 5M 15 6W A 375	3.885	3.840	-	1.187	.781	1-1/2
70 5M 15 6W A 375	4.386	4.341	-	1.187	.781	1-1/2
72 5M 15 6W A 375	4.511	4.466	-	1.187	.781	1-1/2

Timing Pulleys
8mm & 14mm HTD Pitch

Many types available. Please call for availablity and pricing, or fill out a QuikQuote request here.

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part number configuration, definitions, and conversions

# 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