Roller Chain Sizing Chart: The Roller Chain Manufacturer's Expert Guide

Why Proper Roller Chain Sizing Matters

Selecting the correct size minimizes wear, reduces elongation, and enhances energy efficiency—thus extending chain and machinery lifespan. Mismatched roller chains can cause misalignment, early failure, and increased downtime—costing time and money.

Roller Chain Size Chart Basics

· Pitch: center-to-center distance between pins

· Roller diameter: ensures proper sprocket engagement

· Inner width: must match sprocket tooth width

· Pin diameter: affects shear strength and fatigue resistance

Reinforce using standards like ANSI and metric charts, referencing general industry charts

Step-by-step Guide: How to Measure Roller Chain

Using a digital caliper, ruler, and downloadable chain template for accurate measurements.

Measuring pitch (center-to-center of pins), roller size, and the inner plate width, then matching to standard charts like those in ANSI single-strand tables.

Next, match measurements to the standard roller chain size chart.

→ ANSI Roller Chain Size(A series roller chain)

→ Metric Roller Chain Size(B series roller chain)

For more details about how to measure roller chain size.

Roller Chain Sizing Chart Samples

ANSI Single-strand Roller Chain Size

Chain Size	Pitch	Roller diameter	Width between innner plates	Pin diameter	Pin length		Inner plate depth	Plate thickness	Average tensile strength	Weight per meter
	P	d1 max	b1 min	d2 max	L max	Lc max	h2 max	T max	Q0	q
	mm	mm	mm	mm	mm	mm	mm	mm	kN	kg/m
15	4.7625	2.48	2.38	1.62	6.10	6.90	4.30	0.60	2.0	0.08
*25	6.3500	3.30	3.18	2.31	7.90	8.40	6.00	0.80	5.0	0.15
*35	9.5250	5.08	4.77	3.58	12.40	13.17	9.00	1.30	11.3	0.33
41	12.7000	7.77	6.25	3.58	13.75	15.00	9.91	1.30	12.6	0.41
40	12.7000	7.95	7.85	3.96	16.60	17.80	12.00	1.50	18.6	0.62
50	15.8750	10.16	9.40	5.08	20.70	22.20	15.09	2.03	31.3	1.02
60	19.0500	11.91	12.57	5.94	25.90	27.70	18.00	2.42	43.2	1.50
80	25.4000	15.88	15.75	7.92	32.70	35.00	24.00	3.25	74.3	2.60
100	31.7500	19.05	18.90	9.53	40.40	44.70	30.00	4.00	107.6	3.91
120	38.1000	22.23	25.22	11.10	50.30	54.30	35.70	4.80	163.1	5.62
140	44.4500	25.40	25.22	12.70	54.40	59.00	41.00	5.60	222.5	7.50
160	50.8000	28.58	31.55	14.27	64.80	69.60	47.80	6.40	266.9	10.10
180	57.1500	35.71	35.48	17.46	72.80	78.60	53.60	7.20	361.1	13.45
200	63.5000	39.68	37.85	19.85	80.30	87.20	60.00	8.00	466.8	16.15
240	76.2000	47.60	47.35	23.81	95.50	103.00	72.39	9.50	671.6	23.20

Click to see more roller chain sizes, like multi-strand roller chains, which provide higher tensile strength and load capacity, suitable for heavy-duty machinery.

Insights from Our Manufacturer's Experience

Chain Plate Heating Treating

Our chain plates undergo advanced heat treatment processes to ensure optimal hardness and strength. By carefully controlling temperature and cooling cycles, we enhance the plate's wear resistance, fatigue strength, and durability, allowing the roller chain to withstand high loads and extended operating hours without premature failure.

Chain quality testing

Every roller chain is rigorously tested before it leaves our factory. We conduct dimensional checks, tensile strength tests, fatigue tests, and surface inspections to guarantee that each chain meets or exceeds ANSI/ISO standards. Our strict quality control ensures consistent performance, safety, and reliability in demanding industrial environments.

Custom Specialty Chains

We offer customized roller chain solutions designed to meet unique application needs. Options include corrosion-resistant materials, specialty coatings, extended pitch designs, heavy-duty configurations, and chains for extreme temperatures or harsh environments. Our engineering team works closely with customers to deliver precise, application-specific solutions.