|52v1000w mid drive motor
|6061 Alloy Aluminum
|Bafang G510 mid motor
|52V17.5Ah*2 CZPT Battery Cells
|Hydraulic Suspension Fork
|Front and rear light available
|Tektro Hydraulic Disc Brake
|Bafang color LCD display
|9/11 Speed Shimano/Microshift
|52V controller integrated with frame
|9/11 Speed Shimano/Microshift
|Torque sensor, pedal assisted
|13g Stainless steel
|Plug as final market requirement
|Rust resistant chain
|90km+ by PAS
|N.W / G.W
|45kg / 55kg
The Manufacturer and Trade company
HangZhou Lanbo Technology Co., Ltd
HangZhou Bridge Import & Export Co., Ltd
10years experience R&D team
Consisted of engineers from famous company such as Ginat, Lvyuan and etc. More than 10 years professional R&D experience can help you to design, open mould, make samples, provide professional ODM and OEM service with flexibility.
50000pcs annual production capacity
2 e-bike assembly lines, stereoscopic warehouse, CNC workshop,wheel winding assembly line, packing line help to support intime delivery.
7years mature cooperation with famous brands
Longtime support from famous bike part brands such as Bafang, Tektro, Shimano, Suntour, RST, Promax, Wellgo, Selle Royal and etc to shorten the production leadtime
100% test of the bike
Strict QC process has been poved by years cooperation with USA brands such as Juiced Bikes, Bird and etc, including IQC, IPQC, FQC, OQC. 100% test of the bike before delivery is promised.
4hours to HangZhou port, 1.5hour from HangZhou airport, 2hours from ZheJiang Xihu (West Lake) Dis.ao Airport by CRH train
Only 4 hours to HangZhou port ensures the container to arrive at the port before the cutom closing time.
1.5hour from HangZhou airport, 2hours from ZheJiang Xihu (West Lake) Dis.ao airport, you can easily come and visit our factory.
Two choices for you:
A:All-in-1 cotton packaging.
If you sell directly to customers, we advise packing in this way,this kind of packing can greatly help to deal with the rough handling but at the same time, it will cost more.
If you sell to distributors, we advise you use this packing method: pearl cotton and carto. This kind of protection may not as perfect as the above one, but if sell to distributors, it is sufficient to protect the bikes. Also it will be cheaper than the first one.
1. Q: Where is your company located? How can I visit there?
A: We are located in HangZhou, ZHangZhoug province of China. It’s 4 hours’ drive from ZheJiang airport and 2 hours’ drive from HangZhou airport. It could be faster by CRH train. We warmly welcome business and technical partners from worldwide
2. Q: Can I get sample and how long will it take?
A: Yes, sample order is available for quality check and market test. If it is the type we have in stock, it normally takes within 10 days to deliver. If it is a new type or customized, it may need 2-3 months depending on different parts lead time.If it is a new type or customized, it may need 2-3 months depending on different parts lead time.
3. Q: What’s the MOQ?
A: MOQ is 10pcs for each model. If less than MOQ, we will charge sample fee accordingly.
4. Q: Can I have my own customized product?
A: Yes. We are a veteran manufacturer and totally back up our customers to establish their own brand. OEM&ODM are both available, including outlook, logo, color and package design etc.
5. Q: Can I mix different models in 1 container?
A: Yes. You can mix up 3-4 different models in 1 container.
6. Q: What’s the delivery time?
A: It normally takes about 30-60 days to finish order. But the exact time is according to actual situation.
7. Q: What is the payment terms?
A: T/T and L/C at sight.
8. Q: How does your factory carry out quality control?
A:We have a mature and strict QC process, including IQC, IPQC, FQC, and OQC. Thus we have a good quality control on key parts including battery, motor, brake and other electronic and mechanical parts. We have professional testers to do 100% road testing. Our factory meets the ISO9001:2015 management standards.
9.Q:Can I choose any color?
A: Yes. We can provide various color options.
10. Q:What are your terms of packing?
A: Each bike will be packed by 7-layer carton with EPE stuffing, which providing double protection. Carton marks can be customized accordingly.
11.Q:Are you a trading company or manufacturer?
A: We are an experienced manufacturer with a factory covering an area over 9000 square meters, including assembly workshop, wheel-knitting workshop, CNC processing workshop, R&D center, warehouse and etc.. We also have exporting company can do international trading business.
12.Q:How about your Warranty?
A:a)Charger, motor and lithium battery: 24 months warranty.
b)Controller: 18 months warranty
c)Frame: 36 months warranty.
The following conditions, not including in warranty policy:
a.) Any damages caused by human factor.
b.) Dismounting any parts without professional technical people.
c.) Use other parts in our electric bike or scooter.
d.) Damages caused by traffic accident and other accident.
e.) The problem caused by overloading.
13.Q:Can you change specifications for me ?
A:Yes. We will evaluate customized changes and provide ODM and OEM service.
14.Q:What’s your online service time?
A:We are on-line from 8:00am to 17.00pm ZheJiang Time (GMT+8),from Monday to Saturday. Please leave message when we are offline, we will reply as long as we read it.
Screw Shaft Types
If you’re looking for a screw shaft, but aren’t sure which type to buy, you’re in luck. In this article, we’ll talk about the different types, including Threaded shank, Round head, and Machined. Once you’ve read it, you’ll know which type to buy. Then, you can decide whether you want a ball screw nut or a threaded shank.
Machined screw shafts
Besides the standard stainless steel shaft, manufacturers also provide a variety of other materials, such as titanium, bronze, and brass. In addition to stainless steel, manufacturers also provide a variety of top-coating options, including zinc, brass, and chromium. Aluminum screws are not particularly durable and are easily affected by weather. Most screw shafts feature self-locking mechanisms. They are especially useful in C-clamps, vises, and screw-top container lids.
For applications where accuracy is vital, a ball screw shaft needs to be annealed. A heat treatment can be performed on the ball screw shaft to ensure that both ends are heated evenly. In this process, the shaft will be more durable, while maintaining its high-precision properties. These screw shafts are a key component in computer-controlled motion-control systems, wire bonding, and other industries that require high-precision and high-quality performance.
Depending on the material used, screw shafts can be made of stainless steel or titanium. High-precision CNC machines and lathes are typically used to manufacture screw shafts. Various shapes and sizes are available, each with a specific application. Whether you need a small or large screw, you can find 1 to fit your needs. And since each size requires a different material, your choice of material is important as well.
In general, the materials used for machining screw shafts are steel, stainless steel, titanium, brass, bronze, and aluminum. Metals that resist corrosion are also commonly used. Other materials for screw shafts are Teflon, nylon, and nylon. You can also find threaded screw shafts in materials such as porcelain, glass, and ceramic. If you want to use your screws in a unique material, consider purchasing a customized one.
Ball screw nuts
If you have a screw shaft, the last thing you want to worry about is the ball nut slipping off. To prevent this, you can place a temporary stop in the shaft’s grooves to ensure that the ball nut does not slide off. When you remove the stop, you can then install the ball screw nut. But, before you can install the ball screw nut, you have to make sure that you have a good grip on the shaft.
When selecting ball screw nuts, it’s important to consider how much preload you need to apply to avoid excessive backlash. Preloading eliminates this problem by making the ball nut compact. It also prevents backlash, which is lost motion caused by clearance between the ball and nut. Backlash disrupts repeatability and accuracy. This is where spacer preloading comes in. You can insert a spacer between the 2 ball nuts to transmit the force to the nut. However, you should keep in mind that this method reduces the load capacity of the ball screw.
The critical speed of a screw is the maximum rotating speed before it whips. This critical speed is influenced by several factors, including the diameter of the screw shaft, the number of support elements, and the material. By adjusting these factors, you can reduce the number of components used and the amount of time it takes to assemble the screw shaft. In addition, you can also reduce the number of components and avoid stacking tolerances. However, the critical speed of plastic nuts is limited due to sliding friction.
The ball screw nut has several characteristics that make it unique. Its most prominent feature is the presence of ball bearings. These balls help reduce friction between the screw nut and the shaft. Without ball bearings, the friction would be too high to function properly. Another important characteristic is the groove profile of the nut and ball. These 2 features ensure that the ball and the nut meet at 2 points. You’ll be amazed by the results of the work of these ball screw nuts.
Wood screws are usually not fully threaded because the shank has an unthreaded portion at the top. This shoulder part forces the screw to compress 2 pieces of wood, which prevents the screw from overheating and compromising the materials strength. As the screw is threaded partially up, it is not as difficult to remove as a fully threaded screw. However, it is important to note that a wood screw will not hold as tightly as 1 with a fully threaded shank.
In addition to being universal, screw threads can be of different sizes. For example, a M8 screw has a thread pitch of 1.25 mm. To avoid confusion, screw thread pitches are commonly given with a multiplication sign. For example, M8x1 means that the screw is 8 mm in diameter but has a thread pitch of 1 mm per 360-degree rotation. Those who are not familiar with these dimensions may find it confusing.
The OD of the threaded portion of a bolt is generally smaller than the OD of the nut. If the shank is too deep for the nut to fit, the threads may bottom out. This is why it’s important to use a thread-cutting bit with a small thread diameter. You can use a micrometer or caliper to measure the thread diameter. This tool will also allow you to easily identify which screw size fits where and how well.
The metric system is the most widely used. Fasteners with DIN numbers are generally metric in size. This makes them very useful for industrial settings. You can find metric-sized screws anywhere, as long as you buy them from a reputable manufacturer. These fasteners also come with a dog point, which is used for safety wire. If the screw needs to be replaced, the shank can be drilled with a hole for a safety wire or for a dog-point.
A round head screw is the most common type used for machine screws. Other common types include truss head, flat head, and hexed head. Each has a different profile and are used for different purposes. A round head screw is typically wider than a flat or a hexed head, and has a slightly rounded surface. These screws are useful for projects involving sheet metal or sheet-metal parts. Round heads are usually slightly wider than a hex head screw, and they may also be used as a substitute for washers in certain applications. However, truss heads are not necessary for every project.
A wood screw has a smooth shank that protrudes above the surface of the material it is attaching. A metal screw has a threaded shaft that is fully threaded from head to point, and a fully threaded shaft provides more bite. Two common head styles are round head and pan head. If the task requires the screw to be flush or countersunk, the round head will be the best choice.
Another type is the Reed & Prince screw drive. These are similar to Phillips screws but have a 75-degree V shape. They are commonly used in marine hardware and are also known as BNAE NFL22-070. This type is also used for steel plate hangers. In addition to round head and pan head screws, there are a variety of other screw types. You can even get a head with a slotted head if you know where to look.
Screw diameters are specified according to the ISO 261 or ISO 262 standards. An M8 screw has a diameter of 8.25 mm. The M8 screw has a pitch of 1.25 mm, which is equivalent to 1 mm per 360 degrees. There are several other standard screw sizes and thread diameters available. You can find them all by consulting the relevant standards. But remember, the metric system is the most popular.
A self-locking mechanism for a screw shaft is a device that secures the screw to its supporting member in a failure position. The locking mechanism provides a positive connection between the screw shaft and the control surface during normal operation, and locks the screw to its supporting member when the screw fails. Previous attempts to solve this problem have typically used secondary nuts with free play on the screw, which were intentionally designed to jam when loaded. However, such a device can be unreliable, which is why the present invention offers a more robust and reliable locking mechanism.
The self-locking function of a screw depends on several factors, including its pitch angle and the coefficient of friction of the threads. The angle of friction must be less than the tangent of the material pairing to prevent untightening of the screw. Screws with self-locking mechanisms have an efficiency e lower than 50%, which is less than half. Self-locking screws also have the benefit of being less efficient than a standard screw.
Unlike a normal screw, a self-locking screw can be turned in either direction. The nut 22 rotates with the screw shaft, and the member 23 is translated in an axial direction. Regardless of the direction of the rotation of the screw, this axial translation will result in the opposite moment to that input moment. While screw self-locking mechanisms are typically less expensive, they are more reliable and durable.
Another important feature of self-locking screws is that they are not susceptible to independent loosening. The screw cannot rotate without a certain amount of torque. In addition, a self-locking screw shaft must have a small wedge with a smaller half-angle than the arctangent of the static friction. This means that the torque applied by the driver must be greater than the torque needed to overcome the friction.