ANSI Roller Chain

ANSI Roller Chain

Roller chains are essential components in many mechanical systems, providing efficient and reliable power transmission. ANSI roller chains, regulated by the American National Standards Institute (ANSI), are particularly well-regarded for their strict dimensional and performance criteria, ensuring compatibility and durability across various applications.

The ANSI B29.1 standard covers 14 different sizes of RS Roller Chains, helping manufacturers produce roller chains that can be used interchangeably with sprockets from other vendors, simplifying maintenance, and enhancing equipment compatibility.

Types of ANSI Roller Chain

Single-Strand Roller Chains:

Commonly used in basic power transmission applications, available in chain sizes: ANSI RS25, RS35, RS40, RS41, RS50, RS60, RS80, RS100, RS120, RS140, RS160, RS180, RS200 and RS240.

Double-Strand Roller Chains:

Offer higher load capacity, suitable for heavier machinery.

Triple-Strand and Quadruple-Strand Roller Chains:

Used in high-power applications where single or double-strand chains are insufficient.

Specialty Chains:

Include heavy-duty and double-pitch roller chains for specific industrial uses.

ANSI Roller Chain Pitch Size

ANSI Roller Chain Size	Pitch(mm)	ANSI Roller Chain Size	Pitch(mm)
rs25 Roller Chain	6.350	rs100 Roller Chain	31.750
rs35 Roller Chain	9.525	rs120 Roller Chain	38.100
rs41 Roller Chain	12.700	rs140 Roller Chain	44.450
rs40 Roller Chain	12.700	rs160 Roller Chain	50.800
rs50 Roller Chain	15.875	rs180 Roller Chain	57.150
rs60 Roller Chain	19.050	rs200 Roller Chain	63.500
rs80 Roller Chain	25.400	rs240 Roller Chain	76.200

ANSI Roller Chain Dimension

✔ Pitch (P):

Distance between roller centers.

✔ Inner Width (b1):

Distance between inner plates.

✔ Roller Diameter (d1):

Diameter of the rollers.

✔ Plate Height (h2) and Thickness (T):

Dimensions of the chain plates.

✔ Pin Diameter (d2)

The diameter of the connecting pins.

ANSI Simplex Roller Chain Dimension

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

ANSI Duplex Roller Chain Dimension

Chain Size	Pitch	Roller diameter	Width between innner plates	Pin diameter	Pin length		Inner plate depth	Plate thickness	Transverse	Average tensile strength	Weight per meter
	P	d1 max	b1 min	d2 max	L max	Lc max	h2 max	T max	Pt	Q0	q
	mm	mm	mm	mm	mm	mm	mm	mm	mm	kN	kg/m
#*25-2 Roller Chain	6.350	3.30	3.18	2.31	14.5	15.0	6.00	0.80	6.40	10.0	0.28
#*35-2 Roller Chain	9.525	5.08	4.77	3.58	22.5	23.3	9.00	1.30	10.13	22.3	0.63
#41-2 Roller Chain	12.700	7.77	6.25	3.58	25.7	26.9	9.91	1.30	11.95	16.9	0.81
#40-2 Roller Chain	12.700	7.95	7.85	3.96	31.0	32.2	12.00	1.50	14.38	37.2	1.12
#50-2 Roller Chain	15.875	10.16	9.40	5.08	38.9	40.4	15.09	2.03	18.11	62.6	2.00
#60-2 Roller Chain	19.050	11.91	12.57	5.94	48.8	50.5	18.00	2.42	22.78	86.4	2.92
#80-2 Roller Chain	25.400	15.88	15.75	7.92	62.7	64.3	24.00	3.25	29.29	148.6	5.15
#100-2 Roller Chain	31.750	19.05	18.90	9.53	76.4	80.5	30.00	4.00	35.76	215.2	7.80
#120-2 Roller Chain	38.100	22.23	25.22	11.10	95.8	99.7	35.70	4.80	45.44	326.2	11.70
#140-2 Roller Chain	44.450	25.40	25.22	12.70	103.3	107.9	41.00	5.60	48.87	445.0	15.14
#160-2 Roller Chain	50.800	28.58	31.55	14.27	123.3	128.1	47.80	6.40	58.55	533.8	20.14
#180-2 Roller Chain	57.150	35.71	35.48	17.46	138.6	144.4	53.60	7.20	65.84	722.2	29.22
#200-2 Roller Chain	63.500	39.68	37.85	19.85	151.9	158.8	60.00	8.00	71.55	933.6	32.24
#240-2 Roller Chain	76.200	47.63	47.35	23.81	183.4	190.8	72.39	9.50	87.83	1343.2	45.23

ANSI Triplex Roller Chain Dimension

Chain Size	Pitch	Roller diameter	Width between innner plates	Pin diameter	Pin length		Inner plate depth	Plate thickness	Transverse	Average tensile strength	Weight per meter
	P	d1 max	b1 min	d2 max	L max	Lc max	h2 max	T max	Pt	Q0	q
	mm	mm	mm	mm	mm	mm	mm	mm	mm	kN	kg/m
#*25-3 Roller Chain	6.350	3.30	3.18	2.31	21.0	21.5	6.00	0.80	6.40	15.00	0.44
#*35-3 Roller Chain	9.525	5.08	4.77	3.58	32.7	33.5	9.00	1.30	10.13	33.90	1.05
#40-3 Roller Chain	12.700	7.95	7.85	3.96	45.4	46.6	12.00	1.50	14.38	55.80	1.90
#50-3 Roller Chain	15.875	10.16	9.40	5.08	57.0	58.5	15.09	2.03	18.11	93.90	3.09
#60-3 Roller Chain	19.050	11.91	12.57	5.94	71.5	73.3	18.00	2.42	22.78	129.60	4.54
#80-3 Roller Chain	25.400	15.88	15.75	7.92	91.7	93.6	24.00	3.25	29.29	222.90	7.89
#100-3 Roller Chain	31.750	19.05	18.90	9.53	112.2	116.3	30.00	4.00	35.76	322.80	11.77
#120-3 Roller Chain	38.100	22.23	25.22	11.10	141.4	145.2	35.70	4.80	45.44	489.30	17.53
#140-3 Roller Chain	44.450	25.40	25.22	12.70	152.2	156.8	41.00	5.60	48.87	667.50	22.20
#160-3 Roller Chain	50.800	28.58	31.55	14.27	181.8	186.6	47.80	6.40	58.55	800.70	30.02
#180-3 Roller Chain	57.150	35.71	35.48	17.46	204.4	210.2	53.60	7.20	65.84	1083.30	38.22
#200-3 Roller Chain	63.500	39.68	37.85	19.85	223.5	230.4	60.00	8.00	71.55	1400.40	49.03
#240-3 Roller Chain	76.200	47.63	47.35	23.81	271.3	278.6	72.39	9.50	87.83	2014.80	71.60

Choosing the Right ANSI Roller Chain

Selecting the appropriate roller chain involves considering factors like load capacity, environmental conditions, and compatibility with existing sprockets. Accurate measurement and identification of the roller chain size are essential steps in this process.

Proper maintenance is key to extending the life of roller chains. Regular lubrication, tension checks, and timely replacement of worn-out components can prevent common issues like chain elongation and sprocket wear. Understanding and troubleshooting these issues can ensure smooth and reliable operation