China Custom China Foundry Resin Sand Casting Worm Gear Supplier with high quality

Solution Description


HangZhou CZPT Engineering Technologies Co., Ltd. established in 2001 , Company is situated in the Chinese historical metropolis — HangZhou. Our business has been engaged in generating custom manufactured engineering components, OEM/ODM spare elements and industrial parts for numerous years, like sand casting components and investment casting spare areas, forging components, sheet metal stamping spare components, machined areas and plastic elements, which are commonly utilised in petrochemical, vehicle, chemical, environmental safety , machinery, construction, agriculture, aerospace, maritime hardware and other industries.



Sand casting accessories and cnc machining part for engine, refrigerator and air conditioner, fan, compressor, pump, flange, washer, coupling, gearbox case, shaft, valve and strainer, tractor, automotive, motor rotor, electronic case, computer,  water treatment equipment. Weight of products range from 0.5kgs to 10tons. The usually used materials are ductile iron, gray iron, high chrome iron, many kinds of steel, brass, copper, aluminum and wear resistant material, etc.
Process: sand casting+cnc machining+deburrs
Tolerance: +/-.05mm
Surface: deburrs,degrease,chamfer
Service available: OEM & ODM
Quality control: 0 defects,one hundred% inspection before packing
Delivery time: 30 days after confirm the drawing
Packing:   Inner:bubble poly bag Outer:5 layers ctn box or poly wooden box/pallet
Logistics service:  sea,air,express,EXW,FOB,CIF,DDU,DDP

Guarantee:   100% refund or replacement for NOK pcs

Our Services

1, R&D service                       2, Drawing design service
three, Samples service                  4, Bulk production service
five, Inspection service               6, Packing&shipping service

Packaging & Shipping

Inside:bubble bag
Outside:carton case or poly wooden case
Small batch by courier, large batch by sea or air


1. ISO9001-2008
2. SGS
3. Material Certificate
4. CIQ…

Company Capabilities:

(1).CNC machining parts
(2).The fabrication
(3).The mechanical assemble
(4).The Surface treatment

Plating :3+Cr,environmental,anti-corrosion maximum 480 hours salt spray test
Coating:powder coating,electrcial coating,maximum 480 hours salt spray test
Painting:environmental EXPOSY painting,cross-cutting test
Polish:satin polish,mirror polish,electrical polish, maximum 1200 grid
Dacromet:evironmental,anti-corrosion,maximum 560 hours salt spary test
Anodization:tumble,shot blast,sand blast…..,various color,maximum 480 hours salt spray test
Nylok:tight-locking,environmental,5 million times
Heat Treatment:adjust the mechanical properties,temper,normalization,quench……
(5).The Variousl Material
stainless steel:SS304,SS304L,SS316,SS316L,SS430,SS201……
steel alloy:25CrMo,42CrMo,25Cr,40Cr,Q345,11SMn30……
iron cast:QT600,QT250,HT450,HT150……
titanium alloy:GR2,GR5,GR7,GR9……
tungsten alloy:WuNiFe alloy,Carbide Wolfram……
the blanks:stamping parts,forging parts,die casting parts,profile,extrusion……

the plastic:PP,PE,POM,Acrylic,Abdominal muscles,Delrin……



THE Package AND Cargo




Worm Shafts and Gearboxes

If you have a gearbox, you might be pondering what the best Worm Shaft is for your application. There are a number of items to consider, including the Concave shape, Number of threads, and Lubrication. This report will describe each and every aspect and assist you choose the right Worm Shaft for your gearbox. There are numerous alternatives accessible on the market, so never hesitate to shop around. If you are new to the entire world of gearboxes, read on to learn a lot more about this well-liked variety of gearbox.
worm shaft

Concave condition

The geometry of a worm equipment differs noticeably relying on its producer and its intended use. Early worms had a fundamental profile that resembled a screw thread and could be chased on a lathe. Afterwards, equipment with a straight sided g-angle were developed to create threads that had been parallel to the worm’s axis. Grinding was also created to increase the end of worm threads and reduce distortions that occur with hardening.
To select a worm with the correct geometry, the diameter of the worm gear must be in the exact same device as the worm’s shaft. Once the standard profile of the worm equipment is determined, the worm equipment teeth can be specified. The calculation also involves an angle for the worm shaft to avoid it from overheating. The angle of the worm shaft need to be as close to the vertical axis as attainable.
Double-enveloping worm gears, on the other hand, do not have a throat close to the worm. They are helical gears with a straight worm shaft. Given that the teeth of the worm are in make contact with with every single other, they create significant friction. Unlike double-enveloping worm gears, non-throated worm gears are much more compact and can handle scaled-down masses. They are also simple to manufacture.
The worm gears of different companies offer numerous benefits. For instance, worm gears are a single of the most effective ways to improve torque, even though reduce-high quality materials like bronze are tough to lubricate. Worm gears also have a minimal failure price since they permit for significant leeway in the layout approach. Despite the distinctions between the two specifications, the total overall performance of a worm gear method is the very same.
The cone-formed worm is one more type. This is a technological scheme that brings together a straight worm shaft with a concave arc. The concave arc is also a useful utility design. Worms with this shape have a lot more than three contacts at the same time, which signifies they can lessen a massive diameter without having excessive wear. It is also a relatively minimal-expense model.
worm shaft

Thread sample

A excellent worm gear calls for a excellent thread sample. There are a handful of crucial parameters that establish how excellent a thread pattern is. Firstly, the threading pattern must be ACME-threaded. If this is not achievable, the thread must be produced with straight sides. Then, the linear pitch of the “worm” need to be the very same as the round pitch of the corresponding worm wheel. In basic phrases, this signifies the pitch of the “worm” is the very same as the circular pitch of the worm wheel. A fast-adjust gearbox is typically utilized with this variety of worm equipment. Alternatively, guide-screw change gears are utilized instead of a quick-modify gear box. The pitch of a worm gear equals the helix angle of a screw.
A worm gear’s axial pitch need to match the circular pitch of a gear with a higher axial pitch. The round pitch is the length amongst the details of teeth on the worm, even though the axial pitch is the length among the worm’s enamel. An additional issue is the worm’s lead angle. The angle in between the pitch cylinder and worm shaft is referred to as its lead angle, and the increased the direct angle, the higher the performance of a gear.
Worm gear tooth geometry varies relying on the producer and supposed use. In early worms, threading resembled the thread on a screw, and was simply chased utilizing a lathe. Later, grinding enhanced worm thread finishes and minimized distortions from hardening. As a end result, today, most worm gears have a thread pattern corresponding to their measurement. When choosing a worm equipment, make sure to check out for the number of threads before getting it.
A worm gear’s threading is crucial in its procedure. Worm teeth are generally cylindrical, and are organized in a pattern equivalent to screw or nut threads. Worm tooth are typically formed on an axis of perpendicular in contrast to their parallel counterparts. Simply because of this, they have greater torque than their spur gear counterparts. Moreover, the gearing has a reduced output pace and higher torque.

Number of threads

Various sorts of worm gears use various numbers of threads on their planetary gears. A single threaded worm equipment should not be utilized with a double-threaded worm. A one-threaded worm equipment should be utilised with a single-threaded worm. One-threaded worms are a lot more successful for velocity reduction than double-threaded types.
The variety of threads on a worm’s shaft is a ratio that compares the pitch diameter and variety of tooth. In standard, worms have 1,2,4 threads, but some have three, five, or 6. Counting thread starts off can aid you determine the amount of threads on a worm. A one-threaded worm has less threads than a a number of-threaded worm, but a multi-threaded worm will have a lot more threads than a mono-threaded planetary equipment.
To evaluate the quantity of threads on a worm shaft, a tiny fixture with two ground faces is utilized. The worm should be removed from its housing so that the concluded thread location can be inspected. After pinpointing the variety of threads, easy measurements of the worm’s outside diameter and thread depth are taken. As soon as the worm has been accounted for, a cast of the tooth place is made using epoxy material. The casting is moulded between the two tooth flanks. The V-block fixture rests towards the exterior diameter of the worm.
The circular pitch of a worm and its axial pitch have to match the circular pitch of a bigger equipment. The axial pitch of a worm is the length between the details of the enamel on a worm’s pitch diameter. The guide of a thread is the length a thread travels in one revolution. The lead angle is the tangent to the helix of a thread on a cylinder.
The worm gear’s pace transmission ratio is based mostly on the amount of threads. A worm gear with a large ratio can be easily decreased in one particular action by using a set of worm gears. Even so, a multi-thread worm will have much more than two threads. The worm equipment is also a lot more productive than solitary-threaded gears. And a worm gear with a substantial ratio will allow the motor to be utilised in a variety of programs.
worm shaft


The lubrication of a worm equipment is specifically demanding, due to its friction and large sliding speak to drive. The good news is, there are several alternatives for lubricants, these kinds of as compounded oils. Compounded oils are mineral-primarily based lubricants formulated with ten percent or far more fatty acid, rust and oxidation inhibitors, and other additives. This mixture results in improved lubricity, reduced friction, and decrease sliding wear.
When picking a lubricant for a worm shaft, make certain the product’s viscosity is proper for the kind of gearing used. A reduced viscosity will make the gearbox tough to actuate and rotate. Worm gears also endure a higher sliding movement than rolling motion, so grease should be ready to migrate evenly all through the gearbox. Recurring sliding motions will thrust the grease away from the make contact with zone.
An additional thing to consider is the backlash of the gears. Worm gears have high equipment ratios, at times three hundred:1. This is important for energy programs, but is at the exact same time inefficient. Worm gears can generate heat during the sliding motion, so a high-high quality lubricant is important. This kind of lubricant will reduce heat and make sure optimum overall performance. The adhering to guidelines will aid you pick the proper lubricant for your worm equipment.
In low-pace applications, a grease lubricant may possibly be ample. In higher-pace purposes, it really is very best to apply a artificial lubricant to avoid premature failure and tooth dress in. In equally circumstances, lubricant choice is dependent on the tangential and rotational velocity. It is critical to comply with manufacturer’s recommendations regarding the decision of lubricant. But don’t forget that lubricant selection is not an easy task.

China Custom China Foundry Resin Sand Casting Worm Gear Supplier     with high qualityChina Custom China Foundry Resin Sand Casting Worm Gear Supplier     with high quality