Transmission Belt Gearbox Parts General Duty Conveyor Roller Chains and Bush Chains 20b Series Hub Sprockets

• Standard Or Nonstandard: Standard, Nonstandard
• Application: Motor, Electric Cars, Motorcycle, Machinery, Marine, Toy, Agricultural Machinery, Car, Motor, Electric Cars, Motorcycle, Machinery, Marine, Toy, Agricultural Machinery, Car
• Hardness: Hardened Tooth Surface
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: 20B 48T
• Manufacturing Method: Rolling Gear
• Toothed Portion Shape: Spur Gear
• Material: 1045, Stainless Steel
• Type: Circular Gear
• Transport Package: According to Customer Requirements
• Specification: Alloy steel
• Trademark: SMCC OR NO MARK
• Origin: China
• HS Code: 8483900090
• Production Capacity: 100000000

Product Description

SPROCKET  1'' 1/4 X 3/4''  20B SERIES SPROCKETS
 

For Chain Acc.to DIN8187 ISO/R 606
Tooth Radius  r3					32.0mm
Radius Width C					3.5mm
Tooth Width b1					18.2mm
Tooth Width B1					18.5mm
Tooth Width B2					54.6mm
Tooth Width B3					91.0mm
20B SERIES ROLLER CHAINS
Pitch					31.75 mm
Internal Width					19.56 mm
Roller Diameter					19.05 mm

 

Z	de	do	SIMPLEX			DUPLEX			TRIPLEX
			dm	D1	A	dm	D2	A	dm	D3	A
8	98.1	82.96	53	20	40	53	20	75	53	20	110
9	108.0	92.84	63	20	40	63	20	75	63	20	110
10	117.9	102.74	70	20	40	70	20	75	70	20	110
11	127.8	112.68	77	20	45	80	20	80	80	20	115
12	137.8	122.68	88	20	45	90	20	80	90	20	115
13	147.8	132.65	98	20	45	100	20	80	100	20	115
14	157.8	142.68	108	20	45	110	20	80	110	20	115
15	167.9	152.72	118	20	45	120	20	80	120	20	115
16	177.9	162.75	120	20	50	120	25	80	120	25	115
17	187.9	172.78	120	25	50	120	25	80	120	25	115
18	198.0	182.85	120	25	50	*120	25	80	*120	25	115
19	208.1	192.91	120	25	50	*120	25	80	*120	25	115
20	218.1	202.98	120	25	50	"120	25	80	*120	25	115
21	228.2	213.04	140	25	55	•140	25	80	*140	25	115
22	238.3	223.11	140	25	55	*140	25	80	*140	25	115
23	248.3	233.17	140	25	55	140	25	80	140	25	115
24	258.4	243.23	140	25	55	•140	25	80	*140	25	115
25	268.5	253.33	140	25	55	*140	25	80	*140	25	115
26	278.6	263.40	*150	25	55	*150	25	80	*150	25	115
27	288.6	273.49	*150	25	55	*150	25	80	*150	25	115
28	298.7	283.56	*150	25	55	*150	25	80	*150	25	115
29	308.8	293.65	*150	25	55	*150	25	80	*150	25	115
30	318.9	303.75	*150	25	55	*150	25	80	*150	25	115
31	329.0	313.85	*150	25	55	*150	25	80	*150	30	115
32	339.1	323.91	*150	25	55	*150	25	80	*150	30	115
33	349.2	334.01	*150	25	55	*150	25	80	*150	30	115
34	359.3	344.10	*150	25	55	*150	25	80	*150	30	115
35	369.4	354.20	*150	25	55	*150	25	80	*150	30	115
36	379.5	364.30	*150	25	55	*150	30	80	*150	30	115
37	389.5	374.39	*150	25	55	*150	30	80	*150	30	115
38	399.6	384.49	*150	25	55	*150	30	80	*150	30	115
39	409.7	394.59	*150	25	55	*150	30	80	*150	30	115
40	419.8	404.69	*150	25	55	*150	30	80	*150	30	115
41	429.9	414.77	*150	25	70	*160	30	90	*160	30	110
42	440.0	424.86	*150	25	70	*160	30	90	*160	30	110
43	450.1	434.96	*150	25	70	*160	30	90	*160	30	110
44	460.2	445.06	*150	25	70	*160	30	90	*160	30	110
45	470.3	455.17	*150	25	70	*160	30	90	*160	30	110
46	480.4	465.25	*150	25	70	*160	30	90	*160	30	110
47	490.5	475.35	*150	25	70	*160	30	90	*160	30	110
48	500.6	485.45	*150	25	70	*160	30	90	*160	30	110
49	510.7	495.55	*150	25	70	*160	30	90	*160	30	110
50	520.8	505.65	*150	25	70	*160	30	90	*160	30	110
51	530.9	515.75	*150	25	80	*160	30	100	*180	30	123
52	541.0	525.85	*150	25	80	*160	30	100	*180	30	123
53	551.1	535.95	*150	25	80	*160	30	100	*180	30	123
54	561.2	546.05	*150	25	80	*160	30	100	*180	30	123
55	571.3	556.15	*150	25	80	*160	30	100	*180	30	123
56	581.4	566.25	*150	25	80	*160	30	100	*180	30	123
57	591.5	576.35	*150	25	80	*160	30	100	*180	30	123
58	601.6	586.45	*150	25	80	*160	30	100	*180	30	123
59	611.7	596.56	*150	25	80	*160	30	100	*180	30	123
60	624.8	606.66	*150	25	80	*160	30	100	*180	30	123
62	642.0	626.86	*150	25	80	*160	30	100	*180	30	123
64	662.2	647.07	*150	25	80	*160	30	100	*180	30	123
65	672.3	657.17	*150	25	80	*160	30	100	*180	30	123
66	682.4	667.27	*150	25	80	*180	30	100	*200	30	123
68	702.6	687.48	*150	25	80	*180	30	100	*200	30	123
70	722.8	707.68	*150	25	80	*180	30	100	*200	30	123
72	743.1	727.89	*150	25	80	*180	30	100	*200	30	123
75	773.3	758.20	*150	25	80	*180	30	100	*200	30	123
76	783.3	768.32	*150	25	80	*180	30	100	*200	30	123
80	823.9	808.71	*150	25	80	*180	30	100	*200	30	123
85	874.4	859.23	*150	25	90	*180	30	100	*200	30	123
90	924.9	909.76	*150	25	90	*180	30	100	*200	30	123
95	975.2	960.28	*150	25	90	*180	30	100	*200	30	123
100	1026.0	1010.80	*150	25	90	*180	30	100	*200	30	123
114	1167.4	1152.26	*150	25	90	*180	30	100	*200	30	123

Notice: *welding hub

BASIC INFO.
 

Product name	DIN ISO Standard Sprocket for Roller Chain
Materials Available	1. Stainless Steel: SS304, SS316, etc
	2. Alloy Steel: C45, 45Mn, 42CrMo, 20CrMo, etc
	3. OEM according to your request
Surface Treatment	Heat treatment, Quenching treatment, High frequency normalizing treatment, Polishing, Electrophoresis paint processing, Anodic oxidation treatment, etc
Characteristic	Fire Resistant, Oil Resistant, Heat Resistant, Abrasive resistance, Oxidative resistance, Corrosion resistance, etc
Design criterion	ISO DIN ANSI & Customer Drawings
Size	Customer Drawings & ISO standard
Application	Industrial transmission equipment
Package	Wooden Case / Container and pallet, or made-to-order
Certificate	ISO9001: 2008
Advantage	Quality first, Service first, Competitive price, Fast delivery
Delivery Time	20 days for samples. 45 days for official order.

INSTALLATION AND USING

The chain spoket, as a drive or deflection for chains, has pockets to hold the chain links with a D-profile cross section with flat side surfaces  parallel to the centre plane of the chain links, and outer surfaces at right angles to the chain link centre plane. The chain links are pressed firmly against the outer surfaces and each of the side surfaces by the angled laying surfaces at the base of the pockets, and also the support surfaces of the wheel body together with the end sides of the webs formed by the leading and trailing walls of the pocket.

NOTICE

When fitting new chainwheels it is very important that a new chain is fitted at the same time, and vice versa. Using an old chain with new sprockets, or a new chain with old sprockets will cause rapid wear.

It is important if you are installing the chainwheels yourself to have the factory service manual specific to your model. Our chainwheels are made to be a direct replacement for your OEM chainwheels and as such, the installation should be performed according to your models service manual.

During use a chain will stretch (i.e. the pins will wear causing extension of the chain). Using a chain which has been stretched more than the above maximum allowance causes the chain to ride up the teeth of the sprocket. This causes damage to the tips of the chainwheels teeth, as the force transmitted by the chain is transmitted entirely through the top of the tooth, rather than the whole tooth. This results in severe wearing of the chainwheel.
 

FOR CHAIN STANDARDS

Standards organizations (such as ANSI and ISO) maintain standards for design, dimensions, and interchangeability of transmission chains. For example, the following Table shows data from ANSI standard B29.1-2011 (Precision Power Transmission Roller Chains, Attachments, and Sprockets) developed by the American Society of Mechanical Engineers (ASME). See the references^[8][9][10] for additional information.

ASME/ANSI B29.1-2011 Roller Chain Standard SizesSizePitchMaximum Roller DiameterMinimum Ultimate Tensile StrengthMeasuring Load25

ASME/ANSI B29.1-2011 Roller Chain Standard Sizes
Size	Pitch	Maximum Roller Diameter	Minimum Ultimate Tensile Strength	Measuring Load
25	0.250 in (6.35 mm)	0.130 in (3.30 mm)	780 lb (350 kg)	18 lb (8.2 kg)
35	0.375 in (9.53 mm)	0.200 in (5.08 mm)	1,760 lb (800 kg)	18 lb (8.2 kg)
41	0.500 in (12.70 mm)	0.306 in (7.77 mm)	1,500 lb (680 kg)	18 lb (8.2 kg)
40	0.500 in (12.70 mm)	0.312 in (7.92 mm)	3,125 lb (1,417 kg)	31 lb (14 kg)
50	0.625 in (15.88 mm)	0.400 in (10.16 mm)	4,880 lb (2,210 kg)	49 lb (22 kg)
60	0.750 in (19.05 mm)	0.469 in (11.91 mm)	7,030 lb (3,190 kg)	70 lb (32 kg)
80	1.000 in (25.40 mm)	0.625 in (15.88 mm)	12,500 lb (5,700 kg)	125 lb (57 kg)
100	1.250 in (31.75 mm)	0.750 in (19.05 mm)	19,531 lb (8,859 kg)	195 lb (88 kg)
120	1.500 in (38.10 mm)	0.875 in (22.23 mm)	28,125 lb (12,757 kg)	281 lb (127 kg)
140	1.750 in (44.45 mm)	1.000 in (25.40 mm)	38,280 lb (17,360 kg)	383 lb (174 kg)
160	2.000 in (50.80 mm)	1.125 in (28.58 mm)	50,000 lb (23,000 kg)	500 lb (230 kg)
180	2.250 in (57.15 mm)	1.460 in (37.08 mm)	63,280 lb (28,700 kg)	633 lb (287 kg)
200	2.500 in (63.50 mm)	1.562 in (39.67 mm)	78,175 lb (35,460 kg)	781 lb (354 kg)
240	3.000 in (76.20 mm)	1.875 in (47.63 mm)	112,500 lb (51,000 kg)	1,000 lb (450 kg

For mnemonic purposes, below is another presentation of key dimensions from the same standard, expressed in fractions of an inch (which was part of the thinking behind the choice of preferred numbers in the ANSI standard):

Pitch (inches)	Pitch expressed in eighths	ANSI standard chain number	Width (inches)
^1⁄4	^2⁄8	25	^1⁄8
^3⁄8	^3⁄8	35	^3⁄16
^1⁄2	^4⁄8	41	^1⁄4
^1⁄2	^4⁄8	40	^5⁄16
^5⁄8	^5⁄8	50	^3⁄8
^3⁄4	^6⁄8	60	^1⁄2
1	^8⁄8	80	^5⁄8

Notes:
1. The pitch is the distance between roller centers. The width is the distance between the link plates (i.e. slightly more than the roller width to allow for clearance).
2. The right-hand digit of the standard denotes 0 = normal chain, 1 = lightweight chain, 5 = rollerless bushing chain.
3. The left-hand digit denotes the number of eighths of an inch that make up the pitch.
4. An "H" following the standard number denotes heavyweight chain. A hyphenated number following the standard number denotes double-strand (2), triple-strand (3), and so on. Thus 60H-3 denotes number 60 heavyweight triple-strand chain.
 A typical bicycle chain (for derailleur gears) uses narrow 1⁄2-inch-pitch chain. The width of the chain is variable, and does not affect the load capacity. The more sprockets at the rear wheel (historically 3-6, nowadays 7-12 sprockets), the narrower the chain. Chains are sold according to the number of speeds they are designed to work with, for example, "10 speed chain". Hub gear or single speed bicycles use 1/2" x 1/8" chains, where 1/8" refers to the maximum thickness of a sprocket that can be used with the chain.

Typically chains with parallel shaped links have an even number of links, with each narrow link followed by a broad one. Chains built up with a uniform type of link, narrow at one and broad at the other end, can be made with an odd number of links, which can be an advantage to adapt to a special chainwheel-distance; on the other side such a chain tends to be not so strong.

Roller chains made using ISO standard are sometimes called as isochains.

 

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