Product Description

ISO9001 standard Arm/bucket/boom excavator hydraulic cylinder for sale
Construction Equipment Hydraulic Cylinders

Hydraulic cylinders that are used on construction equipment must be rugged and reliable.; They will experience a lifetime exposed to heavy use in a harsh environment.; Failure in service will result in costly downtime,; project delays and maintenance headaches.; These cylinders must be designed to withstand the following:; Temperature Extremes -winter cold and summer heat.; Abrasives - dirt,; CZPT and dust.; Corrosive Environments - rain and salt.; Work Load - heavy continual use.; Contamination - asphalt and cement splatter.;

1.;Rod seal:;superior quality named-brand seals improve a longer life and seal effect polyurethane U-packing rod seals/buffer seals · bonded-to-metal wiper seals custom seals available
2.;:;Skived&burnished or vertical honing tube assures the concentricity and straightness
3.;Bushing:;Hardened steel bushing or copper bushing
4.;Eye:;All eyes are made of forged high strenght steel improve cylinder not only in appearance but in mechanical performance
5.;Rod:;Induction hardened prior to chrome plating enhances the surface hardness,;enhanced chrome plating improve corrosion resistence and anti-scratch performance
6.;Piston:;High pressure piston sealing material:;teflon or nylon seals.;High precision machining maximize the consistency of parts.;
7.;Cap:;All caps are made of forged high strength steel

Technology
*Skive Roller Burnishing Machines
*Vertical Honing machine
*Mchining Centers
*CNC Lathes
*Automatic Welding Machines
*Grinders
*Polishing machine
*Cylinder Assembly Benches
*Cylinder Test Benches
*Spray room

Process flow
Materials feeling → Tempering → Cylindrical lathe cutting → High-frequency quenching → Cylindrical grinding → Hard chrome plating → External grinding
After tempering and surface high-frequency quenching,;external surface hard chrome
piating,; make it hard both internal and external with smooth surface.;

Piston rod:; Adopt high precision mirror polishing
      

Material	45# high grade carbon steel or 40CR
Tempering hardness	HB240-260
The depth of the high frequency	2mm-3mm
High frequency hardness	HRC55°±2°
Chrome plating thickness	0.;03mm-0.;06mm
Chromium layer hardness	HV800-1000vpn
Straightness	≤0.;08mm/m
Surface roughness	Ra0.;03um- Ra0.;06um
Outside diameter tolerance	f7

Hydraulic Cylinder Tube:; Using imported equipment rolling machine

Kind of steel	45#	Tensile strength N/mm	≥647
Linearity	0.;3-1/1000	Specific elongation	≥4
Precision of size	HB		207
Roughness of inner hole	0.;4-0.;8

HangZhou Fortune Machinery Co.;,; Ltd.; is 1 of main manufacturers and exporters of undercarriage parts for excavators and bulldozers for more than 15 years in China.; Its factory is located at HangZhou City of ZheJiang Province,; very near HangZhou Port with a very convenient transportation.;

HangZhou Fortune Machinery mainly supply undercarriage replacement parts such as track rollers,; top rollers,; sprockets,; segments,; idler assy,; track link assy,; track shoe,; bucket,; bucket teeth,; bucket link,; I link,; cutting side,; end bits,; long boom&arm,; bushings pins,; bolts and nuts for excavators and bulldozers.; Its products are applicable for most famous makes such as Komatsu,; Hitachi,; Caterpillar,; Kobelco,; Kato,; Daewoo,; Hyundai,; CZPT and so on.; Most products are exported to European,; Southeast Asia,; Middle East,; South America etc.;

With the principal "Good quality and Best services at reasonable prices",; we strive to continually improve our production technique to provide better products at better prices.; We cordially welcome the customers from all over the world to consult and visit,; on the basis of mutual benefit and creat refulgence together.;

BRAND
KOMATSU	PC30	PC40	PC45	PC60	PC75	PC100	PC120	PC200
EXCAVATOR	PC220	PC300	PC350	PC400
CATERPILLAR	E70B	E110	E120	E200B	E307	E311	E312	E320
EXCAVATOR	E322	E325	E300B	E330
KOMATSU	D20	D21	D30	D31	D37	D40	D50	D60
BULLDOZER	D63	D65	D80	D85	D135	D155	D355	D375
CATERPILLAR	D3C	D3D	D4	D4C	D4D	D4E	D5	D5H
BULLDOZER	D6	D6C	D6D	D6H	D7E	D7G	D8N	D9N
HITACHI	EX30	EX40	EX60	EX100	EX120	EX200	EX220	EX300
	EX400	ZAX200	ZX330	ZX350	UH07	UH081	UH083
DAEWOO	DH55	DH200	DH220	DH280	DH300	DH320
HYUNDAI	R55	R110	R130	R150	R200	R210	R250	R290
KEBELCO	SK60	SK100	SK120	SK200	SK220	SK300	K904	K907
MITSUBISHI	MS110	MS120	MS140	MS180
KATO	HD140	HD250	HD400	HD550	HD700	HD850	HD900	HD1220
SAMSUNG H.;I.;	MX8	SE200	SE210	SE280	MX292	SE350
SUMITOMO	SH70	SH100	SH120	SH160	SH200	SH280	SH300	SH340

FAQ:;
1.; You are a trader or a manufacture?
    We are an industry and trade integration business,; our factory located on HangZhou Nanan Distric,; and our sales department is in City centre of HangZhou.; The distance is  80Kms,; 1.;5 hours.;
2.; How can I be sure the part will fit my excavator?
    Give us correct model number/machine serial number/ any numbers on the parts itself.; Or measure the parts give us dimension or drawing.;
3.; How about the payment terms?
     We usually accept T/T or L/C.; other terms also could be negotiated.;
4.; What is your minimum order?
     It depends on what you are buying.; Normally,; our minimum order is USD5000.; 1 20' full container and LCL container (less than a container load); can be acceptable.;
5.; What is your delivery time?
     FOB HangZhou or any Chinese port :; 20 days .; If there are any parts in stock ,; our delivery time is only 7-10 days.;
6.; What about Quality Control?
    We have a perfect QC system for the perfect products.; A team who will detect the product quality and specification piece carefully,; monitoring every production process until packing is complete,; to ensure product safety into container.;

Contact us:;
HangZhou Fortune Machinery Co.;,; Ltd.;
Contact person:;James
fortunepart.;en.;made-in-china.;com

 

What Is a Worm Gear Reducer?

If you have never seen a worm gear reducer before, you're missing out! Learn more about these incredible gears and their applications by reading this article! In addition to worm gear reducers, learn about worms and how they're made. You'll also discover what types of machines can benefit from worm gears, such as rock crushers and elevators. The following information will help you understand what a worm gear reducer is and how to find 1 in your area.

Typical worm shaft

A typical worm has 2 shafts, 1 for advancing and 1 for receding, which form the axial pitch of the gear. Usually, there are 8 standard axial pitches, which establish a basic dimension for worm production and inspection. The axial pitch of the worm equals the circular pitch of the gear in the central plane and the master lead cam's radial pitch. A single set of change gears and 1 master lead cam are used to produce each size of worm.
Worm gear is commonly used to manufacture a worm shaft. It is a reliable and efficient gear reduction system that does not move when the power is removed. Typical worm gears come in standard sizes as well as assisted systems. Manufacturers can be found online. Listed below are some common materials for worm gears. There are also many options for lubrication. The worm gear is typically made from case hardened steel or bronze. Non-metallic materials are also used in light-duty applications.
A self-locking worm gear prevents the worm from moving backwards. Typical worm gears are generally self-locking when the lead angle is less than 11 degrees. However, this feature can be detrimental to systems that require reverse sensitivity. If the lead angle is less than 4 degrees, back-driving is unlikely. However, if fail-safe protection is a prerequisite, back-driving worm gears must have a positive brake to avoid reverse movement.
Worm gears are often used in transmission applications. They are a more efficient way to reduce the speed of a machine compared to conventional gear sets. Their reduced speed is possible thanks to their low ratio and few components. Unlike conventional gear sets, worm gears require less maintenance and lower mechanical failure than a conventional gear set. While they require fewer parts, worm gears are also more durable than conventional gear sets.
There are 2 types of worm tooth forms. Convex and involute helicoids have different types of teeth. The former uses a straight line to intersect the involute worm generating line. The latter, on the other hand, uses a trapezoid based on the central cross section of the root. Both of these tooth forms are used in the production of worms. And they have various variations in pitch diameter.

Types of worms

Worms have several forms of tooth. For convenience in production, a trapezoid-based tooth form is used. Other forms include an involute helicoidal or a convolute worm generating a line. The following is a description of each type. All types are similar, and some may be preferred over others. Listed below are the 3 most common worm shaft types. Each type has its own advantages and disadvantages.
Discrete versus parallel axis: The design of a worm gear determines its ratio of torque. It's a combination of 2 different metals - 1 for the worm and 1 for the wheel - which helps it absorb shock loads. Construction equipment and off-road vehicles typically require varying torques to maneuver over different terrain. A worm gear system can help them maneuver over uneven terrain without causing excessive wear.
Worm gear units have the highest ratio. The sliding action of the worm shaft results in a high self-locking torque. Depending on the angle of inclination and friction, a worm gear can reach up to 100:1! Worm gears can be made of different materials depending on their inclination and friction angle. Worm gears are also useful for gear reduction applications, such as lubrication or grinding. However, you should consider that heavier gears tend to be harder to reverse than lighter ones.
Metal alloy: Stainless steel, brass, and aluminum bronze are common materials for worm gears. All 3 types have unique advantages. A bronze worm gear is typically composed of a combination of copper, zinc, and tin. A bronze shaft is more corrosive than a brass one, but it is a durable and corrosion-resistant option. Metal alloys: These materials are used for both the worm wheel.
The efficiency of worm gears depends on the assembly conditions and the lubricant. A 30:1 ratio reduces the efficiency to 81:1%. A worm gear is more efficient at higher ratios than an helical gear, but a 30:1 ratio reduces the efficiency to 81%. A helical gear reduces speed while preserving torque to around 15% of the original speed. The difference in efficiency between worm gear and helical gear is about half an hour!

Methods of manufacturing worm shafts

Several methods of manufacturing worm shafts are available in the market. Single-pointed lathe tools or end mills are the most popular methods for manufacturing worms. These tools are capable of producing worms with different pressure angles depending on their diameter, the depth of thread, and the grinding wheel's diameter. The diagram below shows how different pressure angles influence the profile of worms manufactured using different cutting tools.
The method for making worm shafts involves the process of establishing the proper outer diameter of a common worm shaft blank. This may include considering the number of reduction ratios in a family, the distance between the worm shaft and the gear set center, as well as the torques involved. These processes are also referred to as 'thread assembly'. Each process can be further refined if the desired axial pitch can be achieved.
The axial pitch of a worm must match the circular pitch of the larger gear. This is called the pitch. The pitch diameter and axial pitch must be equal. Worms can be left-handed or right-handed. The lead, which refers to the distance a point on the thread travels during 1 revolution of the worm, is defined by its angle of tangent to the helix on the pitch of the cylinder.
Worm shafts are commonly manufactured using a worm gear. Worm gears can be used in different applications because they offer fine adjustment and high gear reduction. They can be made in both standard sizes and assisted systems. Worm shaft manufacturers can be found online. Alternatively, you can contact a manufacturer directly to get your worm gears manufactured. The process will take only a few minutes. If you are looking for a manufacturer of worm gears, you can browse a directory.
Worm gears are made with hardened metal. The worm wheel and gear are yellow in color. A compounded oil with rust and oxidation inhibitors is also used to make worm gears. These oils adhere to the shaft walls and make a protective barrier between the surfaces. If the compounded oil is applied correctly, the worm gear will reduce the noise in a motor, resulting in a smoother performance.

applications for worm gear reducers

Worm gears are widely used in power transmission applications, providing a compact, high reduction, low-speed drive. To determine the torque ratio of worm gears, a numerical model was developed that makes use of the equation of displacement compatibility and the influence coefficient method, which provides fast computing. The numerical model also incorporates bending deflections of the gear surfaces and the mating surfaces. It is based on the Boussinesq theory, which calculates local contact deformations.
Worm gears can be designed to be right or left-handed, and the worm can turn either clockwise or counter-clockwise. An internal helical gear requires the same hand to operate both parts. In contrast, an external helical gear must be operated by the opposite hand. The same principle applies to worm gears in other applications. The torque and power transferred can be large, but worm gears are able to cope with large reductions in both directions.
Worm gears are extremely useful in industrial machinery designs. They reduce noise levels, save space, and give machines extra precision and fast-stopping capabilities. Worm gears are also available in compact versions, making them ideal for hoisting applications. This type of gear reducer is used in industrial settings where space is an issue. Its smaller size and less noise makes it ideal for applications that need the machine to stop quickly.
A double-throated worm gear offers the highest load capacity while still remaining compact. The double-throated version features concave teeth on both worm and gear, doubling the contact area between them. Worm gears are also useful for low to moderate-horsepower applications, and their high ratios, high output torque, and significant speed reduction make them a desirable choice for many applications. Worm gears are also quieter than other types of gears, reducing the noise and vibrations that they cause.
Worm gears have numerous advantages over other types of gears. They have high levels of conformity and can be classified as a screw pair within a lower-pair gear family. Worm gears are also known to have a high degree of relative sliding. Worm gears are often made of hardened steel or phosphor-bronze, which provides good surface finish and rigid positioning. Worm gears are lubricated with special lubricants that contain surface-active additives. Worm gear lubrication is a mixed lubrication process and causes mild wear and tear.