Premium Short Pitch Transport Roller Chain Type 20A-1 for Efficient Motion

• Customization: Available
• Production Scope: Parts Production Line
• Condition: New
• Model NO.: short pitch roller chain
• Automation: Automation
• After-sales Service: 1 Year
• Standard or Nonstandard: Standard
• Application: Textile Machinery, Garment Machinery
• Surface Treatment: Polishing
• Structure: Roller Chain
• Material: Alloy Steel
• Type: Short Pitch Chain
• Usage: Conveyor Chain
• Feature: Fire Resistant
• Chain Size: Pitch 9.525mm
• Color: Natural
• Function: Moisture and Acid Against
• Certificationtion: ISO90001, SGS
• Packaging: Industrial Packing or Customers′ Request
• Attachment: Two-Sided
• Warranty: 1 Year
• Transport Package: Carton Cases. Pallet or Wooden Box
• Specification: 08B-72B; 08A-48A
• Trademark: SMCC OR NO MARK
• Origin: China
• HS Code: 7315119000
• Production Capacity: 5000000meters/Year
• Package Size: 40.00cm * 30.00cm * 20.00cm
• Package Gross Weight: 50.000kg

Product Description

Basic Info

ANSI/ISO/DIN NO:	100	Chain NO:	20A-1
Pitch (mm):	31.75	Roller Diameter(mm):	19.05
Inner Plate Width (mm):	18.90	Average Tensile Strength:	107.6KN
Pin Diameter(mm):	9.53	Plate Thickness (mm):	4.00
Weight / Meter (kgs/m):	3.91	Chain Size:	5F, 10F, 5Meters
Origin:	Qingdao China	HS Code:	7315119000

Product Description

ISO/ANSI/ DIN ISO/ANSI/ DIN Chain No.	Chain No.	Pitch	Roller diameter	Width between inner plates	Pin diameter	Pin length		Inner plate depth	Plate thickness	Tensile strength	Average tensile strength	Weight per meter
		P	d1 max	b1 min	d2 max	L max	Lc max	h2 max	T max	Q min	Qo	q
		mm	mm	mm	mm	mm	mm	mm	mm	kN/lbf	kN	kg/m
15	*03C	4.7625	2.48	2.38	1.62	6.10	6.90	4.30	0.60	1.80/409	2.0	0.08
*25	*04C-1	6.3500	3.30	3.18	2.31	7.90	8.40	6.00	0.80	3.50/795	5.0	0.15
*35	*06C-1	9.5250	5.08	4.77	3.58	12.40	13.17	9.00	1.30	7.90/1795	11.3	0.33
41	085-1	12.7000	7.77	6.25	3.58	13.75	15.00	9.91	1.30	6.67/1516	12.6	0.41
40	08A-1	12.7000	7.95	7.85	3.96	16.60	17.80	12.00	1.50	14.10/3205	18.6	0.62
50	10A-1	15.8750	10.16	9.40	5.08	20.70	22.20	15.09	2.03	22.20/5045	31.3	1.02
60	12A-1	19.0500	11.91	12.57	5.94	25.90	27.70	18.00	2.42	31.80/7227	43.2	1.50
80	16A-1	25.4000	15.88	15.75	7.92	32.70	35.00	24.00	3.25	56.70/12886	74.3	2.60
100	20A-1	31.7500	19.05	18.90	9.53	40.40	44.70	30.00	4.00	88.50/20114	107.6	3.91
120	24A-1	38.1000	22.23	25.22	11.10	50.30	54.30	35.70	4.80	127.00/28864	163.1	5.62
140	28A-1	44.4500	25.40	25.22	12.70	54.40	59.00	41.00	5.60	172.40/39182	222.5	7.50
160	32A-1	50.8000	28.58	31.55	14.27	64.80	69.60	47.80	6.40	226.80/51545	266.9	10.10
180	36A-1	57.1500	35.71	35.48	17.46	72.80	78.60	53,60	7.20	280.20/63682	361.1	13.45
200	40A-1	63.5000	39.68	37.85	19.85	80.30	87.20	60.00	8.00	353.80/80409	466.8	16.15
240	48A-1	76.2000	47.63	47.35	23.81	95.50	103.00	72.39	9.50	510.30/115977	671.6	23.20

SO/ANSI/ DIN SO/ANSI/ DIN Chain No	Chain No.	Pitch	Rbller diameter	Width between inner plates	Pin diameter	Pin    length		Inner plate depth	Plate thickness	Transverse pitch	Tensile strength	Average tensile strength	Weight per meter
		P	di max	b1 min	d2 max	L max	Lc max	h2 max	T ma x	Pt	Q min	Qo	q
		mm	mm	m				mm	mm	mm	kN/Ibf	kN	kg/m
*25-2	*04C-2	6.350	3.30	3.18	2.31	14.5	15.0	6.00	0.80	6.40	7.00/1591	10.0	0.28
*35-2	*06C-2	9.525	5.08	4.77	3.58	22.5	23.3	9.00	1.30	10.13	15.80/3591	22.3	0.63
41-2	1985-2	12.700	7.77	6.25	3.58	25.7	26.9	9.91	1.30	11.95	13.34/3032	16.9	0.81
40-2	08A-2	12.700	7.95	7.85	3.96	31.0	32.2	12.00	1.50	14.38	28.20/6409	37.2	1.12
50-2	10A-2	15.875	10.16	9.40	5.08	38.9	40.4	15.09	2.03	18.11	44.40/10091	62.6	2.00
60-2	12A-2	19.050	11.91	12.57	5.94	48.8	50.5	18.00	2.42	22.78	63.60/14455	86.4	2.92
80-2	16A-2	25.400	15.88	15.75	7.92	62.7	64.3	24.00	3.25	29.29	113.40/25773	148.6	5.15
2000-2	20A-2	31.750	19.05	18.90	9.53	76.4	80.5	30.00	4.00	35.76	177.00/40227	215.2	7.80
2020-2	24A-2	38.100	22.23	25.22	11.10	95.8	99.7	35.70	4.80	45.44	254.00/57727	326.2	11.70
2040-2	28A-2	44.450	25.40	25.22	12.70	103.3	107.9	41.00	5.60	48.87	344.80/78364	445.0	15.14
160-2	32A-2	50.800	28.58	31.55	14.27	123.3	128.1	47.80	6.40	58.55	453.60/103091	533.8	20.14
180-2	36A-2	57.150	35.71	35.48	17.46	138.6	144.4	53.60	7.20	65.84	560.50/127386	722.2	29.22
200-2	40A-2	63.500	39.68	37.85	19.85	151.9	158.8	60.00	8.00	71.55	707.60/160818	933.6	32.24
240-2	48A-2	76.200	47.63	47.35	23.81	183.4	190.8	72.39	9.50	87.83	1020.60/213955	1343.2	45.23

1. Providing 10 series more than 8000 models of chains,Heavy duty engineering chains, oil field chains, heavy duty  port crane chains, metallurgy conveyor chains, ultra-high tension escalator chains, mining chains, etc, and  customized solutions. 

2. More than 80% of our roller chain are exported to all over the world, We are serving customers of top 5 of world famous manufacturers , and more than 90% of our turnover are from the cooperation with the manufacturers in the world.   

3. Having advanced online inspection for automatic assembly lines.  

4. Having nation level Enterprise Technology Center,  we cost no less than 13% of our annual turnover investment in R&D  each year.

5. Having our own Standardization Management Committee in our company, and participated in the formulation and modification of the roller chain standards of the People's Republic of China.

Company profile
   

Qingdao Star Machine Technology Co., Ltd. is located in the beautiful coastalcity-Qingdao. We are a large enterprise groups engaged in researching, productionmarketing and technical services, having three large research and production basesand one large marketing center for transmission parts, bearings, chains, sprocketstractor driving axles and hydraulic steering units. Covering 80, 000 square meters.now we have 816 employees including 167 senior professional technicians anda global network of sales and service system. Keeping good partnership withLiaocheng University, Qingdao University, Shandong Agricultural University.Shandong University and Chinese Academy of Agricultural Sciences, we are gettinggreat technical support from industry experts
"You provide a request, We'll give you a perfect product". We uphold the businessphilosophy "integrity, efficiency, cooperation, innovation", quality first, advancedtechnology, precision production, integrity management, efficient service, to supporour customers with the top quality products and super sophisticated technology.

 

 

ROLLER CHAIN

  Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles. It consists of a series of short cylindrical rollers held together by side links. It is driven by a toothed wheel called a sprocket. It is a simple, reliable, and efficient means of power transmission.
 

CONSTRUCTION OF THE CHAIN

<sup>Two different sizes of roller chain, showing construction.
There are two types of links alternating in the bush roller chain. The first type is inner links, having two inner plates held together by two sleeves or bushings upon which rotate two rollers. Inner links alternate with the second type, the outer links, consisting of two outer plates held together by pins passing through the bushings of the inner links. The "bushingless" roller chain is similar in operation though not in construction; instead of separate bushings or sleeves holding the inner plates together, the plate has a tube stamped into it protruding from the hole which serves the same purpose. This has the advantage of removing one step in assembly of the chain.

The roller chain design reduces friction compared to simpler designs, resulting in higher efficiency and less wear. The original power transmission chain varieties lacked rollers and bushings, with both the inner and outer plates held by pins which directly contacted the sprocket teeth; however this configuration exhibited extremely rapid wear of both the sprocket teeth, and the plates where they pivoted on the pins. This problem was partially solved by the development of bushed chains, with the pins holding the outer plates passing through bushings or sleeves connecting the inner plates. This distributed the wear over a greater area; however the teeth of the sprockets still wore more rapidly than is desirable, from the sliding friction against the bushings. The addition of rollers surrounding the bushing sleeves of the chain and provided rolling contact with the teeth of the sprockets resulting in excellent resistance to wear of both sprockets and chain as well. There is even very low friction, as long as the chain is sufficiently lubricated. Continuous, clean, lubrication of roller chains is of primary importance for efficient operation as well as correct tensioning.</sup>

USE

An example of two 'ghost' sprockets tensioning a triplex roller chain system
Roller chains are used in low- to mid-speed drives at around 600 to 800 feet per minute; however, at higher speeds, around 2,000 to 3,000 feet per minute, V-belts are normally used due to wear and noise issues.
A bicycle chain is a form of roller chain. Bicycle chains may have a master link, or may require a chain tool for removal and installation. A similar but larger and thus stronger chain is used on most motorcycles although it is sometimes replaced by either a toothed belt or a shaft drive, which offer lower noise level and fewer maintenance requirements.
The great majority of automobile engines use roller chains to drive the camshaft(s). Very high performance engines often use gear drive, and starting in the early 1960s toothed belts were used by some manufacturers.
Chains are also used in forklifts using hydraulic rams as a pulley to raise and lower the carriage; however, these chains are not considered roller chains, but are classified as lift or leaf chains.
Chainsaw cutting chains superficially resemble roller chains but are more closely related to leaf chains. They are driven by projecting drive links which also serve to locate the chain onto the bar.

Sea Harrier FA.2 ZA195 front (cold) vector thrust nozzle - the nozzle is rotated by a chain drive from an air motor
A perhaps unusual use of a pair of motorcycle chains is in the Harrier Jump Jet, where a chain drive from an air motor is used to rotate the movable engine nozzles, allowing them to be pointed downwards for hovering flight, or to the rear for normal forward flight, a system known as Thrust vectoring.



WEAR

 

The effect of wear on a roller chain is to increase the pitch (spacing of the links), causing the chain to grow longer. Note that this is due to wear at the pivoting pins and bushes, not from actual stretching of the metal (as does happen to some flexible steel components such as the hand-brake cable of a motor vehicle).

With modern chains it is unusual for a chain (other than that of a bicycle) to wear until it breaks, since a worn chain leads to the rapid onset of wear on the teeth of the sprockets, with ultimate failure being the loss of all the teeth on the sprocket. The sprockets (in particular the smaller of the two) suffer a grinding motion that puts a characteristic hook shape into the driven face of the teeth. (This effect is made worse by a chain improperly tensioned, but is unavoidable no matter what care is taken). The worn teeth (and chain) no longer provides smooth transmission of power and this may become evident from the noise, the vibration or (in car engines using a timing chain) the variation in ignition timing seen with a timing light. Both sprockets and chain should be replaced in these cases, since a new chain on worn sprockets will not last long. However, in less severe cases it may be possible to save the larger of the two sprockets, since it is always the smaller one that suffers the most wear. Only in very light-weight applications such as a bicycle, or in extreme cases of improper tension, will the chain normally jump off the sprockets.

The lengthening due to wear of a chain is calculated by the following formula:

M = the length of a number of links measured

S = the number of links measured

P = Pitch

In industry, it is usual to monitor the movement of the chain tensioner (whether manual or automatic) or the exact length of a drive chain (one rule of thumb is to replace a roller chain which has elongated 3% on an adjustable drive or 1.5% on a fixed-center drive). A simpler method, particularly suitable for the cycle or motorcycle user, is to attempt to pull the chain away from the larger of the two sprockets, whilst ensuring the chain is taut. Any significant movement (e.g. making it possible to see through a gap) probably indicates a chain worn up to and beyond the limit. Sprocket damage will result if the problem is ignored. Sprocket wear cancels this effect, and may mask chain wear.

CHAIN STRENGTH

The most common measure of roller chain's strength is tensile strength. Tensile strength represents how much load a chain can withstand under a one-time load before breaking. Just as important as tensile strength is a chain's fatigue strength. The critical factors in a chain's fatigue strength is the quality of steel used to manufacture the chain, the heat treatment of the chain components, the quality of the pitch hole fabrication of the linkplates, and the type of shot plus the intensity of shot peen coverage on the linkplates. Other factors can include the thickness of the linkplates and the design (contour) of the linkplates. The rule of thumb for roller chain operating on a continuous drive is for the chain load to not exceed a mere 1/6 or 1/9 of the chain's tensile strength, depending on the type of master links used (press-fit vs. slip-fit)^{[citation needed]}. Roller chains operating on a continuous drive beyond these thresholds can and typically do fail prematurely via linkplate fatigue failure.

The standard minimum ultimate strength of the ANSI 29.1 steel chain is 12,500 x (pitch, in inches)². X-ring and O-Ring chains greatly decrease wear by means of internal lubricants, increasing chain life. The internal lubrication is inserted by means of a vacuum when riveting the chain together.

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.

More Product

Advantage

Why Choose Us ?

1. Reliable Quality Assurance System
2. Cutting-Edge Computer-Controlled CNC Machines
3. Bespoke Solutions from Highly Experienced Specialists
4. Customization and OEM Available for Specific Application
5. Extensive Inventory of Spare Parts and Accessories
6. Well-Developed Worldwide Marketing Network
7. Efficient After-Sale Service System

 

The 219 sets of advanced automatic production equipment provide guarantees for high product quality. The 167 engineers and technicians with senior professional titles can design and develop products to meet the exact demands of customers, and OEM customizations are also available with us. Our sound global service network can provide customers with timely after-sales technical services.

We are not just a manufacturer and supplier, but also an industry consultant. We work pro-actively with you to offer expert advice and product recommendations in order to end up with a most cost effective product available for your specific application. The clients we serve worldwide range from end users to distributors and OEMs. Our OEM replacements can be substituted wherever necessary and suitable for both repair and new assemblies.