Durable Lifting Leaf Chain for Agricultural and Industrial Use

• Customization: Available
• Production Scope: Parts Production Line
• Condition: New
• Model NO.: BL422~BL2088
• Automation: Automation
• After-sales Service: 1 Year
• Standard or Nonstandard: Standard
• Surface Treatment: Polishing
• Material: Alloy Steel
• Usage: Leaf Chain
• Feature: Fire Resistant
• 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: BL422~BL2088
• 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

 

 

 

 

   

Product Description


 

IS0 IS0 Chain No.	ANSI        ANSI Chain No.	Pitch P	Plate   lacing	Plate   depth     h2     max	Plate thickness T ma  X	Pin diameter	Pin length	Tensile strength	Average   tensile strength	Weight per meter
						d2     max	L max	Q min	Qo	q
								kNlbf	kN	kg/m
LH0822	BL422	12.700	2×2	12.07	2.03	5.09	11.05	22.2/5045	27.6	0.60
LH0823	BL423		2×3				13.16	22.2/5045	27.6	0.75
LH0834	BL434		3×4				17.40	33.4/7591	41.4	1.05
LH0844	BL444		4×4				19.51	44.5/10114	56.0	1.20
LH0846	BL446		4×6				23.75	44.5/10114	56.0	1.46
LH0866	BL466		6×6				27.99	66.7/15159	81.7	1.77
LH0888	BL488		8×8				36.45	89.0/20227	109.4	2.32
LH1022 LH1023	BL522    BL523	15.875 19.050	2×2  2×3 3×4  4×4  4×6   6×6     8×8	15.09	2.42	5.96	12.90 15.37	33.4/7591	43.1	0.90
								33.4/7591	43.1	1.10
LH1034	BL534						20.32 22.78 27.74 32.69 42.57	48.9/11114 66.7/15159	65.6	1.50
LH1044	BL544								84.5	1.80
LH1046	BL546							66.7/15159	84.5	2.20
LH1066 LH1088	BL566    BL588							100.1/22750 133.4/30318	125.1	2.65
									169.5	3.50
LH1222	BL622		2×2	18.11	3.25	7.94	17.37	48.9/11114	68.2	1.50
LH1223	BL623		2×3     3×4				20.73	48.9/11114	68.2	1.80
LH1234	BL634						27.43	75.6/17181	102.8	2.50
LH1244	BL644		4×4				30.78	97.9/22250	136.9	2.90
LH1246	BL646		4×6     6×6     8×8				37.49	97.9/22250	136.9	3.60
LH1266	BL666						44.20	146.8/33364	214.2	4.30
LH1288	BL688						57.61	195.7/44477	217.7	5.80
LH1622 LH1623 LH1634 LH1644 LH1646 LH1666 LH1688	BL822    BL823    BL834    BL844    BL846    BL866    BL888	25.400	2×2     2×3     3×4     4×4     4×6     6×6     8×8	24.13	4.00	9.54	21.34 25.48 33.76 37.90 46.18 54.46 71.02	84.5/19204 84.5/19204 129.0/29318 169.0/38409 169.0/38409 253.6/57636 338.1/76841	108.2	2.40
									108.2    170.0    214.6    214.6    324.5    432.7	3.00 4.20 4.80 6.00 7.20 9.60
LH2022	BL1022	31.75 38.10 44.45	2×2	30.18	4.80	11.11	25.37	115.6/26272	165.8	3.57
LH2023	BL1023		2×3				30.33	115.6/26272	165.8	4.45
LH2034	BL1034		3×4				40.23	182.4/41454	248.7	6.19
LH2044	BL1044		4×4				45.19	231.3/52568	303.6	7.04
LH2046	BL1046		4×6				55.09	231.3/52568	303.6	8.77
LH2066	BL1066		6×6				65.00	347.0/78863	433.7	10.50
LH2088	BL1088		8×8				84.81	462.6/105136	604.1	14.00
LH2422	BL1222		2×2 2×3 3×4 4×4 4×6 6×6 8×8	36.20	5.60	12.71	29.62	151.2/34363	192.0	4.96 6.16 8.55 9.76 12.16 14.61 19.36
LH2423   LH2434	BL1223   BL1234   BL1244						35.43 47.07 52.88	151.2/34363 244.6/55591 302.5/68750	192.0 315.9 381.1
LH2444
LH2446   LH2466	BL1246   BL1266						64.52 76.15	302.5/68750 453.7/103113	381.1 543.6
LH2488	BL1288						99.42	605.0/137500	726.0
LH2822	BL1422		2×2	42.24	6.40	14.29	33.55	191.3/43477	225.7	6.89
LH2823	BL1423		2×3				40.16	191.3/43477	225.7	8.55
LH2834	BL1434		3×4				53.37	315.8/71772	448.3	11.61
LH2844	BL1444		4×4				59.97	382.6/86954	451.2	13.24
LH2846	BL1446		4×6				73.18	382.6/86954	451.2	16.51
LH2866	BL1466		6×6				86.39	578.3/131431	682.4	19.79
LH2888	BL1488		8×8				112.80	765.1/173886	902.8	26.35
LH3222   LH3223   LH3234   LH3244	BL1622   BL1623   BL1634   BL1644	50.80 63.50	2×2    2×3    3×4    4×4    4×6    6×6    8×8	48.26	*7.20	17.46	39.01 46.58 61.72 69.29 84.43 99.57 129.84	289.1/65704 289.1/65704 440.4/100091 573.8/131431 578.3/131431 857.4/194863 1156.5/262841	341.1 341.1 519.6 680.4 680.4 1000.7 1364.6	8.78 10.90 15.15 17.27 21.53 25.88 34.29
LH3246   LH3266	BL1646   BL1666   BL1688
LH3288
LH4022	BL2022		2×2	60.33	9.91	23.81	51.74	433.7/98568	511.7	15.95
LH4023	BL2023		2×3				61.70	433.7/98568	511.7	19.78
LH4034	BL2034		3×4				81.61	649.4/147590	766.2	27.46
LH4044	BL2044		4×4				91.57	867.4/197163	1023.5	31.34
LH4046	BL2046		4×6				111.48	867.4/197163	1023.5	39.01
LH4066	BL2066		6×6				131.39	1301.1/295704	1535.2	46.63
LH4088	BL2088		8×8				171.22	1734.8/394272	2046.5	62.00

 

 

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.

 

 

LEAF CHAIN

 

Leaf chains are known for their durability and high tensile strength. They are primarily used in lift device applications such as forklifts, lift trucks, and lift masts. These hard working chains handle the lifting and balancing of heavy loads with the use of sheaves instead of sprockets for guidance. One of the primary differences with leaf chain compared to roller chain is that it only consists of a series of stacked plates and pins, providing superior lifting strength.
Leaf chains are built of interlaced plates held together by rivet pins. They are built with the same high degree of precision as our roller chains. HKK Leaf chains are used for applications that require strong flexible linkage for transmitting motion or lift. Specially selected steel and unique heat treatment assures high strength and durability. The first number or numbers in leaf chains identifies the chain pitch, the last two numbers identify the chain's lacing. New applications should use BL series leaf chains.

Leaf Chain is the most simple of steel chains, consisting only of link plates and pins. This chain generally has greater tensile strength than roller chains and runs over sheaves rather than sprockets. They are suitable for hanging, balancing or motion transmitting applications. Leaf chains are often used as counterweight chains for machine tools, elevator and oven doors, fork lift truck masts, spinning frames and similar lifting or balancing applications.

Plates are connected by pins and hold the tension loaded on the chain.

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.

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