Metric Roller Chain Size Chart

• Single strand metric roller chains
• Double strand metric roller chains
• Triple strand metric roller chains
• Quad strand metric roller chains

Remember, however, that we stock more metric roller chain sizes and types than those shown in the charts below, such as our corrosion-resistant metric roller chains and our metric double pitch roller chains. If you don't see a metric roller chain in the size that you need, please give us a call or submit our Contact form. Also, note that the part numbers in blue on our metric roller chain size charts below are clickable links that will take you to the detailed product category page for the chain selected. Clicking these links will show you different quality options, pricing, and availability on the metric roller chains you’re looking for.

Single Strand Metric Roller Chain Chart

Chain Size	Pitch (P)	Roller Width (W)	Roller Diameter (D)	Pin Diameter (E)	Plate Height (H)	C/L Width (A):	Breaking Load	Weight (Per Ft)
03B-1	5.0mm	2.5mm	3.2mm	1.49mm	4.1mm	7.4mm	2.4 kN	0.08 kg/m
04B-1	6.0mm	2.8mm	4.0mm	1.85mm	5.0mm	7.8mm	3.2 kN	0.12 kg/m
05B-1	8.0mm	3.0mm	5.0mm	2.31mm	7.1mm	8.9mm	5.9 kN	0.18 kg/m
06B-1	9.525mm	5.72mm	6.35mm	3.28mm	8.2mm	14.1mm	10.4 kN	0.41 kg/m
081B-1	12.7mm	3.3mm	7.75mm	3.66mm	9.9mm	10.2mm	9.97 kN	0.28 kg/m
083B-1	12.7mm	4.88mm	7.75mm	4.09mm	10.3mm	12.9mm	12.7 kN	0.42 kg/m
085B-1	12.7mm	6.38mm	7.77mm	3.58mm	9.9mm	14.0mm	12.26 kN	0.4 kg/m
08B-1	12.7mm	7.75mm	8.51mm	4.45mm	11.8mm	18.2mm	19.4 kN	0.7 kg/m
10B-1	15.875mm	9.65mm	10.16mm	5.08mm	14.7mm	20.9mm	27.5 kN	0.9 kg/m
12B-1	19.05mm	11.68mm	12.07mm	5.72mm	16.0mm	24.2mm	32.2 kN	1.3 kg/m
12BH-1	19.05mm	11.68mm	12.07mm	5.94mm	16.0mm	26.8mm	40.0 kN	2.0 kg/m
16B-1	25.4mm	17.02mm	15.88mm	8.28mm	21.0mm	37.4mm	72.8 kN	2.7 kg/m
20B-1	31.75mm	19.56mm	19.05mm	10.19mm	26.4mm	45.0mm	106.7 kN	3.6 kg/m
24B-1	38.1mm	25.4mm	25.4mm	14.63mm	33.4mm	57.8mm	178.0 kN	6.7 kg/m
28B-1	44.45mm	30.99mm	27.94mm	15.90mm	37.0mm	29.5mm	222.0 kN	8.3 kg/m
32B-1	50.8mm	30.99mm	29.21mm	17.81mm	42.2mm	71.0mm	277.5 kN	10.5 kg/m
40B-1	63.5mm	38.1mm	39.37mm	22.89mm	52.9mm	89.2mm	394.0 kN	16.0 kg/m
48B-1	76.2mm	45.72mm	48.26mm	29.24mm	63.8mm	107.0mm	621.6 kN	25.0 kg/m
56B-1	88.9mm	53.34mm	53.98mm	34.32mm	77.8mm	123.0mm	940.0 kN	35.0 kg/m

Single Strand Metric Roller Chain Drawing

Double Strand Metric Roller Chain Chart

Chain Size	Pitch (P)	Roller Width (W)	Roller Diameter (D)	Pin Diameter (E)	Plate Height (H)	Transverse Pitch (T)	C/L Width (A):	Breaking Load	Weight (Per Ft)
04B-2	6.00mm	2.8mm	4.0mm	1.85mm	5.0mm	5.50mm	13.3mm	5.8 kN	0.23 kg/m
05B-2	8.00mm	3.0mm	5.0mm	2.31mm	7.1mm	5.64mm	14.5mm	10.2 kN	0.36 kg/m
06B-2	9.525mm	5.72mm	6.35mm	3.28mm	8.2mm	10.24mm	24.4mm	18.7 kN	0.8 kg/m
08B-2	12.7mm	7.75mm	8.51mm	4.45mm	11.8mm	13.92mm	32.2mm	38.7 kN	1.0 kg/m
10B-2	15.875mm	9.65mm	10.16mm	5.08mm	14.7mm	16.59mm	37.5mm	56.2 kN	1.8 kg/m
12B-2	19.05mm	11.68mm	12.07mm	5.72mm	16.1mm	19.46mm	43.6mm	66.1 kN	2.5 kg/m
16B-2	25.4mm	17.02mm	15.88mm	8.28mm	21.0mm	31.88mm	69.3mm	133.0 kN	5.4 kg/m
20B-2	31.75mm	19.56mm	19.05mm	10.19mm	26.4mm	36.45mm	81.5mm	211.2 kN	7.2 kg/m
24B-2	38.1mm	25.4mm	25.4mm	14.63mm	33.4mm	48.36mm	106.2mm	319.2 kN	13.5 kg/m
28B-2	44.45mm	30.99mm	27.94mm	15.90mm	37.0mm	59.56mm	129.1mm	406.8 kN	16.6 kg/m
32B-2	50.8mm	30.99mm	29.21mm	17.81mm	42.2mm	58.55mm	129.6mm	508.5 kN	21.0 kg/m
40B-2	63.5mm	38.1mm	39.37mm	22.89mm	52.9mm	72.29mm	161.5mm	711.9 kN	32.0 kg/m
48B-2	7.62mm	45.72	48.26mm	29.24mm	63.8mm	91.21mm	198.2mm	1130.0 kN	50.0 kg/m
56B-2	88.9mm	53.98mm	53.98mm	34.32mm	77.8mm	106.60mm	229.6mm	1760.0 kN	70.0 kg/m

Double Strand Metric Roller Chain Drawing

Triple Strand Metric Roller Chain Chart

Chain Size	Pitch (P)	Roller Width (W)	Roller Diameter (D)	Pin Diameter (E)	Plate Height (H)	Transverse Pitch (T)	C/L Width (A):	Breaking Load	Weight (Per Ft)
05B-3	8.00mm	3.00mm	5.0mm	2.31mm	7.1mm	5.64mm	20.2mm	13.8 kN	0.5 kg/m
06B-3	9.525mm	5.72mm	6.35mm	3.28mm	8.2mm	10.24mm	34.6mm	30.1 kN	1.0 kg/m
08B-3	12.7mm	7.75mm	8.51mm	4.45mm	11.8mm	13.92mm	46.1mm	57.8 kN	2.0 kg/m
10B-3	15.875mm	9.65mm	10.16mm	5.08mm	14.7mm	16.59mm	54.1mm	84.5 kN	2.8 kg/m
12B-3	19.05mm	11.68mm	12.07mm	5.72mm	16.1mm	19.46mm	63.1mm	101.8 kN	3.8 kg/m
16B-3	25.4mm	17.02mm	15.88mm	8.28mm	21.0mm	31.88mm	101.2mm	203.7 kN	8.0 kg/m
20B-3	31.75mm	19.56mm	19.05mm	10.19mm	26.4mm	36.45mm	117.9mm	290.0 kN	11.0 kg/m
24B-3	38.1mm	25.4mm	25.4mm	14.63mm	33.4mm	48.36mm	154.6mm	493.0 kN	21.0 kg/m
28B-3	44.45mm	30.99mm	27.94mm	15.90mm	37.0mm	59.56mm	188.7mm	609.5 kN	25.0 kg/m
32B-3	50.8mm	30.99mm	29.21mm	17.81mm	42.2mm	58.55mm	188.2mm	770.5 kN	32.0 kg/m
40B-3	63.5mm	38.1mm	39.37mm	22.89mm	52.9mm	72.29mm	233.8mm	1092.5 kN	48.0 kg/m
48B-3	76.2mm	45.72mm	48.26mm	29.24mm	63.8mm	91.21mm	289.4mm	1710.0 kN	75.0 kg/m

Triple Strand Metric Roller Chain Drawing

FAQs About Metric Roller Chain Sizes

Curious to find out more about metric roller chain sizing? We've prepared the answers to the most common questions we get asked.

What is a metric roller chain size chart?

A metric roller chain size chart lists the pitch, roller diameter, width, and pin sizes for every metric (ISO and British Standard) chain designation, all in millimeters, so you can identify your chain and order the exact replacement. For a full imperial and metric reference, see our roller chain size chart.

What are the standard metric roller chain sizes?

Standard metric roller chains follow the ISO 606 British Standard "B" series: 05B, 06B, 08B, 10B, 12B, 16B, 20B, and 24B. Common pitches are 06B at 9.525 mm, 08B at 12.7 mm, 10B at 15.875 mm, 12B at 19.05 mm, and 16B at 25.4 mm. Most sizes are stocked as single-strand metric roller chain.

How do I read a metric chain size in millimeters?

Metric chain size is set by pitch, the distance between two adjacent pin centers, measured in millimeters. Measure center to center on one link and match it to the chart: 12.7 mm is 08B, 15.875 mm is 10B, and 19.05 mm is 12B. Roller diameter and inner width then confirm the exact size.

What is 08B chain?

08B is a British Standard metric roller chain with a 12.7 mm (1/2 inch) pitch, an 8.51 mm roller diameter, and a 7.75 mm inner width. It is one of the most widely used metric sizes for light to medium-duty drives, and it runs on matching 08B chain sprockets.

What is the difference between metric and ANSI roller chain?

Metric (ISO "B" series) and ANSI (standard "A" series) chains can share a similar pitch but use different roller diameters, widths, and pin sizes, so they are not interchangeable. For example, 08B and ANSI 40 are both about 1/2 inch pitch, yet their rollers and side plates differ. Always confirm every dimension before replacing one with the other.

Do you offer single-strand, double-strand, and conveyor metric chain?

Yes. Alongside standard simplex chain, we stock double-strand metric roller chain for higher-load drives and metric conveyor chain (M series) for material-handling systems, in stocked ISO B-series sizes with fast shipping.

At USA Roller Chain and Sprockets we have over 100+ years of industry knowledge and expertise. Besides roller chains, we offer a full line of sprockets, bearings, motors, reducers, V-belts, V-belt pulleys, sensors, robotics, specialty chains, MTO products, and more. We are an A+ rated company with The Better Business Bureau (BBB) and aim to have exceedingly well customer service with fair and competitive pricing. What really sets us apart from the rest is our rapid fast response times, ease to work with, and our export division (Se Habla Espanol). For more information, questions about the metric roller chain size chart or any of our other resources or products, or to get a formal quote, please contact us and we will be happy to assist you.