LL Series Leaf Chain for Manual Hydraulic Forklifts and Small Tonnage Diesel Forklifts

As one of the leaf chain manufacturers, suppliers, and exporters of mechanical products, We offer leaf chain and many other products.

Please get in touch with us for details.

Mail:sales@leafchain.xyz

Description

Leaf Chain

LL series leaf chain is comprised of link plates having the same contour and pitch as those of roller link plates of the same pitch DIN standard roller chain. The pins are the same diameter as that of the same pitch DIN standard roller chain. The lacing options are 2X2, 4X4, and 6X6. The LL series is a light-duty roller chain. It is manufactured to ISO 4347 and ANSI B29.8 for forklifts, rocker shovels, machine tool balancing, and other hoisting equipment.

Leaf Chain Design

The plates of leaf chains are punched from high-grade steel and are subsequently hardened and tempered to guarantee high fatigue strength. Very narrow tolerances ensure that all plates bear the same load proportions. Pins made of high alloy case-hardened steel are tempered to achieve high wear resistance. The tightly adjoining plates are designed in various combinations and rotate on the pins. One special design is the heavy-duty type series U. On chains of this type all plates are mounted with a sliding fit and are also secured with laterally attached riveted disks.

This design guarantees an even load distribution and reduces the bending load of the pins. These chains were especially developed for heavy loads and operations under harsh conditions. Due to their high fatigue strength they are particularly suitable for such application areas. Due to their design (no tooth meshing) leaf chains cannot transmit torques. Their force direction, however, can easily be deflected by means of rollers. Even with a small working width they have a high breaking load.

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LL Series Leaf Chain Size Chart

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Chain No.	Pitch		Plates Lacing	Thickness of Plate	Inside plate hole dia.	Pin dia.	Plate depth	Pin overall length	Ultimate tensile strength	Weight approx.
	P	P		bO(max)	d1(min)	d2(max)	h2(max)	b(max)	Q	q
	in	mm		mm	mm	mm	mm	mm	kN	kg/m
LL0822	1/2"	12.70	2X2	1.55	4.46	4.45	10.92	8.50	18	0.48
LL0844			4X4					14.60	36	0.98
LL0866			6X6					20.70	54	1.44
LL1022	5/8"	15.875	2X2	1.65	5.09	5.08	13.72	9.30	22	0.50
LL1044			4X4					16.10	44	0.94
LL1066			6X6					22.90	66	1.40
LL1222	3/4"	19.05	2X2	1.90	5.73	5.72	16.13	10.70	29	0.70
LL1244			4X4					18.50	58	1.30
LL1266			6X6					26.30	87	2.00
LL1622	1"	25.40	2X2	3.20	8.30	8.28	21.08	17.20	60	1.60
LL1644			4X4					30.20	120	2.90
LL1666			6X6					43.20	180	4.30
LL2022	1.1/4"	31.75	2X2	3.70	10.21	10.19	26.42	20.10	95	2.30
LL2044			4X4					35.10	190	4.20
LL2066			6X6					50.10	285	6.30
LL2422	1.1/2"	38.10	2X2	5.20	14.65	14.63	33.40	28.40	170	4.60
LL2444			4X4					49.40	340	8.20
LL2466			6X6					70.40	510	12.00
LL2822	1.3/4"	44.45	2X2	6.45	15.92	15.90	37.08	34.00	200	4.80
LL2844			4X4					60.00	400	9.50
LL2866			6X6					86.00	600	15.50
LL3222	2"	50.80	2X2	6.45	17.83	17.81	42.29	35.00	260	6.20
LL3244			4X4					61.00	520	11.90
LL3266			6X6					87.00	780	17.80
LL4022	2.1/2"	63.50	2X2	8.25	22.91	22.89	52.96	44.70	360	11.53
LL4044			4X4					77.90	720	22.49
LL4066			6X6					111.10	1080	33.48
LL4822	3"	76.20	2X2	10.30	29.26	29.24	63.88	56.10	560	17.31
LL4844			4X4					97.40	1120	33.61
LL4866			6X6					138.90	1680	49.91

LL Series Leaf Chains and Strength

Leaf chains are famous with engineers for their strength in materials handling, such as with forklifts, lift trucks, lift masts, straddle carriers, and other major works of civil engineering. Their long service life, high fatigue strength and maximum wear resistance make them the ideal solution for long-term projects that need to be both reliable and incredibly strong. The compact design of leaf chains allows them to fit well within a variety of systems. The key parts of a leaf chain include:

Link Plates: Close control of the plate dimensions allows for high fatigue strength and long service life.
Pins: The pins pass through the plates and are subject to shearing forces, while the plates articulate on the pins through rotation over the sheave.

LL Series Leaf Chain Applications

LL Series Leaf Chains are constructed with stacked plates and pins to provide high strength for various high-load applications. LL series leaf chain is ideal for heavy-duty hanging, balancing, or motion transmission applications like:

Forklifts
Material Handling
Lift trucks
Container lifts
Machine tools
Elevator and oven doors
Spinning frames

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Other Types of Leaf Chain

AL Series Leaf Chain

AL Series 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, elevators and oven doors, fork lift trucks, and made to DIN8188 (ANSI) Std’s. There are various options of lacings namely 2X2, 4X4, 6X6 and 8X8.

BL Series Leaf Chain

The BL Series Leaf Chain has Pin and link plate dimensions according to ANSI standard, however, the plate dimensions and pin diameter are those of the next largest size. This provides increased bearing area and tensile strength for longer wear-life with reduced outer dimensions. Made in accordance with DIN 8152 heavy duty American Series. Lacing options include 2X3, 3X4, 4X6, 2X2, 4X4, 6X6 and 8X8.

LL Series Leaf Chain

LL Series Leaf Chains are comprised of link plates having the same contour and pitch as those of the roller link plates of the same pitch DIN/ISO standard roller chains. The pins are of the same diameters as those of the same pitch DIN/ISO standard roller chains. This type of leaf chain has all slip link plates. The two ends of pins are press fit to washers. This design allows for even distribution of load, reduces pin bending, and increases the working load. This type of leaf chain is designed to transport heavy loads in harsh environments.

How Environment Affects Leaf Chain?

Each specific leaf chain application will need to be evaluated for risk according to the extent of environmental exposure it is subject to and the area in which it operates. There are four key environmental conditions that impact leaf chainwear-life:

1) Moisture

Moisture produces corrosive rusting (or oxidisation of the leaf chain steel) which can lead to a reduction in the strength of the leaf chain through the processes of pitting and cracking.

2) Low Temperature

When a lift truck’s daily activity involves constantly moving in and out of cold stores, condensation can form on the outer and bearing surfaces of the chain. This condensation can cause stiffness and eventually result in corrosion fatigue cracking which will reduce the service life of a leaf chain.

3) Chemical Solutions or Vapours

Chemical solutions and vapors can corrode leaf chain components, anchor pins, anchor bolts, and anchor blocks and cause microscopic stress cracking. Depending on the extent of exposure, these cracks can propagate across the leaf chain leading to complete and abrupt failure.

4) Abrasives

Accelerated wearing or scoring of the pin surfaces and link plate apertures will inevitably lead to reduced leaf chain strength. The bearing surfaces of these articulating members are not readily accessible, which means that the wear is not usually visible – so the extent of leaf chain wear should be regularly inspected using a precision tool such as a Chain Wear Gauge.

Leaf Chain Manufacturing Process

The basic technological process of leaf chain manufacturing includes raw material preparation, parts processing (chain plates, pins), rolling processing, parts heat treatment, surface treatment, parts oiling, assembly, and other steps.

Selected high-quality raw materials

Leaf chain carefully selects high-performance raw materials, including high-quality carbon structural steel, alloy structural steel, and spring steel, and strictly controls the raw materials.

Rigorous and comprehensive raw material testing

We has advanced and complete testing laboratories at each of our factories, which conduct scientific and rigorous comprehensive testing of each raw material to ensure that they meet the quality and safety requirements.

High-quality and efficient parts processing

The parts are processed by high-precision, high-speed punches, high-speed cutting equipment, etc.

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Heat treatment of parts

The fully automated mesh belt furnace line, rotary furnaces, converter, and other equipment are used to process the leaf chain parts to improve the strength and toughness of the leaf chain.

Assembly

The leaf chain goes through automated assembly and testing production lines to accurately and efficiently assemble the finished leaf chain.

Finished product inspection

Before leaving the factory, the leaf chain needs to complete a series of inspections and tests, including chain performance tests such as tension, wear, and fatigue.

Other Chains Related Products

We specialize in chains made to customers’ drawings and specifications. Our advantage is reliable quality, competitive price, prompt delivery, and good service. Standard products include various transmission and conveyor chains, like roller chains, double pitch conveyor chains, hollow pin chains, leaf chains, flat top chains, side bow chains, lumber chains, agriculture chains, silent chains, PIV chains, stainless steel chains, nickel/ zinc plated chain, slient chain, engineering chain, steel pintle chain, welded steel chain, forged chain, malleable iron chain, and many other types. Different kinds of attachments are available.

We are one of the best leaf chain manufacturers. We have exported our products to clients around the world and earned a good reputation because of our superior product quality and after-sales service. We warmly welcome customers both at home and abroad to contact us to negotiate business, exchange information, and cooperate with us!