Model Number: Mid drive motor
Warranty: Provide
Product Name: 1000W 90 70H Mid Drive Motor kits 420 Sprocket with EM50SP controller
Voltage(V): 60V or 72V(as default)
Output Power(W): 1000W
Usage: electric scooter/e-bike/e-motorcycle
Type: Mid drive motor
Efficiency: 84~90%
Speed: 60V@45KPH; 72V@55KPH
Color: Black
Waterproof Grade: IP54
Certification: ISO9001, CCC, CE
Packaging Details: Carton Box

1000W 90 70H Mid Drive Motor kits 420 Sprocket with EM50SP controller for electric scooter
For 90 1000W mid drive motor, it could be used for electric scooter, electric motorcycle.
It could be 72V 55KPH, available for 10inch wheel kits.
QS can provide customized 420 14teeth sprocket to match with 1kW mid drive motor.

Kits including
1. 1pcs X QSMOTOR 1000W PMSM IPM mid drive motor with sprocket 420 14 teeth
2. 1pcs X Votol EM50SP sine wave motor controller
3. 1pcs X DKD LCD speedometer
4. 1pcs X Z6 throttle with combination switch

Key Features
1) Light weight and small dimension compare to hub motor
2) High performance benefit from flux weakening
3) High effeciency during climbing, and better acceleration
4) Support regenerative braking

Product description
1. QSMOTOR 1000W 90 80H Mid Drive Motor
Specification

Drawing(for normal)

Test Report

2. EM50SP 72V sinusoidal wave BLDC motor controller
Specification
Sine wave controller, programmable, with regen function
Net weight: 955g
Rated current: 60A
Boost current: 190
Max. Power: 4320W
Flux Weakening Ratio: 100~250%
Max. Efficiency: 88~93%
Degree of protection: IP67
Pictures Show

Drawing(for normal)

3. DKD LCD speedometer, can-bus(optional, CZPT flexible Double Disc coupling LIN as default)
It display D N R, P, S gear, and battery current X5/10.
P.s.: If the working battery doesn’t have can-bus communication, then the can-bus speedometer will shows lack of electricity always.
So, we suggest to do the speedometer as Line communication version if client can’t get can-bus battery.

4. Z6 throttle with combination switch
With Reverse, Parking button( throttle on/off), 3 slide switch gear, s/boost button, Light and Horn.
It match with VOTOL controller well.

Please noted:
Optional appearance, drawing, performance curve/test report are available.
If you need more technical information, please feel free to contact us.
We will give you reply in 12hours.

Application

How to Recommend you suitable motors?
Firstly, To customize a suitable electric hub motor for your vehicle, could you please inform the points in below?
1. E-bike, E-scooter, High torque Clamp Type corrugated shaft coupling Factory direct sale flexible stainless steel bellows coupling Hot Sale E-tricycle or E-car?
2. Weight of vehicle with battery, loading weight (weight with load only)?
3. Tire model/diameter?
4. Rated voltage and wattage of motor, nominal speed/top speed, and climb angle or torque @ what speed?
5. Battery nominal voltage, CZPT voltage, capacity and vehicle range?
6. What’s the drop-outs/rear fork width of your frame?
Within your details information, we could make assessment and calculation accordingly for your project

Company Information About US
SIAECOSYS is an union of manufactories in electric driving industry, and belongs to HangZhou SIA Trading Co., Ltd that set from QS Factory in 2013 year.
Currently, more than 80 top factories join SIAECOSYS, and they are willing to provide customized products and service for international customers who has passion in e-scooter/tricycle/car industry.
SIAECOSYS focus on organizing member factories together to customize specific e-driving system solution and products for different requirements from customers in the world.
Nowadays, SIAECOSYS has more than 5000 customers from the world and more than 40 customers send inquiry every day.
SIAECOSYS has sale department, Technology department, Quality inspection department, general accounting department, purchase department and after-sale service department.

FAQQ1. Are you trader or manufacture?
A: We’re manufacture.

Q2. How long is your production time?A: Generally, Custom design standard stretch flange type SWC-BF cardan shaft the production period is 12-14 working days(6 working days per week).
The specific delivery time depends on the items and the quantity of your order.Q3. How long is your warranty time?
A: For motor, the warranty time is 1 year and 3 months. For other parts, the warranty time is 1 year.

Q4. About Customs Clearance
For some special countries with strict customs for import, so pls. confirm it firstly to us that you have ability to do customs clearance, otherwise we will not take on heavy responsibilities for this issue, return money and goods are not support.
Special countries list:
Argentina, Brazil, Egypt, Turkey, Iran,Portugal,Romania, Kazakhstan, Ukraine, Yeman etc.
Some countries name not listed, the salesman will inform you in time if you placed the order online directly. Thank you for your understanding.

05. Does your products with CE certification?
Yes, our motor with Certification (CE, CCC), SWC-BH standard flex welding type universal coupling professional customized cardan shaft coupling industrial equipment and our factory with certification of ISO9001, TS86949

Choosing the Right Chain Sprocket For Your Bike

When deciding which chain sprocket to buy, you should be aware of how they fit on the bike. These sprockets are often secured to the bike’s shaft by either one or more set screws. ANSI standards for sprocket keyways provide the proper dimensions for a given shaft diameter. However, they aren’t universal and might not apply to all applications. As a result, it is important to consult a supplier who is familiar with the exact keyway dimensions.

Roller chain sprocket

A Roller chain sprocket is a gear with toothed rollers. The tooth profile determines the arc length of the roller. A roller with an undercut tooth profile will not transmit movement properly. For this reason, the pitch line of the roller should be equal to the incremental circle length (r) divided by the number of teeth.
The chain sprocket is available in various types. They can be used in conveyor chains. They are usually available as ready-to-mount units. Finished bores and wide hubs are available for mounting them. They are also available with a roller-bearing design.
The teeth of sprocket wheels are derived from the involute-trochoid curve. In order to engage with these teeth, the roller chain must be sufficiently accurate to avoid backlash. However, conventional roller chains can also engage with these teeth. However, this cannot eliminate backlash completely. This is why the invention provides means for reducing the friction between the teeth and the roller. This also increases the life span of the roller-and-sprocket transmission.
In terms of standards, the ANSI standard is widely used in the industry. It accounts for nearly 15% of the market in Europe and holds an advantage over the ISO standards. In North America, manufacturers of sprockets follow the ANSI code B 29.1. The ANSI code provides clear design guidelines and allows for interchangeability among different types.
There are many considerations to make when selecting a sprocket. A key factor is the transmission input. For example, if the transmission has a high horsepower, the center distance between the large and small sprockets is smaller. To compensate for this, a chain with a smaller pitch may be appropriate. Also, if the transmission has a high horsepower ratio, a multiple-strand drive is a viable option.
If you’re looking for a quality roller chain sprocket, you should check out MDS. They stock a wide range of types and sizes for a variety of industrial machinery.

Gap-tooth sprocket

A gap-tooth chain sprocket has tooth-head heights greater than the ISO tooth form height. This ensures that the pins and rollers meet at a point near the tooth head, and eliminates pulsating movement and intermittent changes in speed.
The front and rear surfaces of the sprocket are convex arcs, with radii equal to each other and the center of the tooth gap bottom. This allows for a uniform pitch and reduced friction. The tooth-face height of a gap-tooth chain sprocket is equal to the pitch of the chain, while the radii of its tooth-faces are larger than that of an ISO tooth-form.
One form of gap-tooth chain sprocket has four teeth at regular intervals. The teeth are interconnected by arc-shaped tooth gap bottoms. The resulting chain pitch is called the chain pitch. The gap-tooth sprocket can be used on various types of wheels.
ISO 606 1994 (E) defines the standard chain length, while Japanese Industrial Standards (JIS B 1801) define the standard tooth form. The ISO and Japanese Industrial Standards define two different tooth forms, namely S-tooth and U-tooth. The ISO and Japanese Industrial Standard tooth forms have different tooth pitches, but the root diameter of both forms is the same. The distance between each tooth is measured from the pitch polygon.
The tooth gap bottom circle of the gap-tooth sprocket gradually contacts the surface of the front tooth in the opposite side of the tooth gap. As this process continues, the tooth surface of the gap-tooth sprocket moves closer to the tooth head. This reduces the impact, which results in less noise.
The gap-tooth chain sprocket is an ideal solution for many applications. It allows the chain to disengage easily. With the same frequency, the teeth of the sprocket also help in regulating vibration. A sprocket with short teeth will be easier to disengage when necessary.
Another popular style of gap-tooth chain sprocket is the random polygon 64. The random polygon is a quadrilateral. Each vertex of the quadrilateral is assigned to one of the four consecutive pins on the uniform chain. The four consecutive pins are aligned in a gap-tooth pattern.

Steel split sprocket

Split sprockets are perfect for large portions of the drive system, as they can be installed without disassembling the entire shaft assembly. These sprockets are also useful in applications where there is limited workspace. They can be installed without disassembling the entire shaft assembly, minimizing the risk of damage to the conveyor system and reducing downtime.
There are several different types of split sprockets, including mat chains and table chains. Each type differs in bore diameter, number of teeth, block body style, and abrasion resistance. Some are made from steel, while others are made from a non-split material.
Split sprockets are available from many manufacturers. Typically, the split sprockets are made with two pieces of steel, which are then joined together again. This assembly technique is a cost-effective way to mount sprockets on a shaft. These sprockets can be stocked in multiple sizes and keyways.
Stainless Steel sprockets are available in stock and custom configurations. They are designed to last for years to come. These sprockets are suitable for conveyors, power transmission systems, and robotics. In addition, these sprockets offer heightened quality and durability. Some of these sprockets feature a bevel or spiral bevel gear, while others are made from helical gear.
Split sprockets are available in a variety of sizes. For instance, the RCS-03 is a plain bore type, while the RCS-04 is a finished bore type. Split sprockets are available with a split taper bushed design. They are also available with either single or multiple strands.

Double-duty sprocket

If you are looking for a heavy-duty chain sprocket, you have many choices. They come in different sizes, shapes, and materials. Some have wide teeth while others have narrow teeth. You should choose a sprocket that has the correct tooth pitch for your chain’s pitch diameter. You should also pay attention to the sprocket’s bore, or the hole in its center through which the drive shaft passes.
The type of transmission will also determine the type of sprocket you need. High-power transmissions, for example, require higher-pitch sprockets than lower-pitch models. To make sure that you choose the right sprocket for your application, check the horsepower and pitch of your transmission. If you have a low-pitch transmission, choose a smaller chain pitch. High-horsepower transmissions may also require multiple-strand drive.
There are different standards for sprockets, but ANSI standards are widely accepted. For instance, ANSI code B 29.1 requires sprockets to have two teeth per chain pitch, whereas ISO standards call for three. The double-duty sprocket, on the other hand, engages every other tooth. This helps the sprocket’s lifespan.
There are many different sprockets, and each has different performance characteristics. Generally, sprockets are made of metal or reinforced plastic and are similar to bicycle gears in their wheel-shaped design. Different types of chain sprockets have different teeth and work with different types of chains. The design of the chain and sprocket also determines the type of sprocket needed.
One popular type of double-duty sprocket is the steel-split sprocket. Its pitch is half the pitch of the chain and is usually referred to as a ‘double-duty’ sprocket. It is often used for heavy-duty purposes, as it distributes the load evenly on the chain.
While sprockets come in different tooth pitches and diameters, the recommended number of teeth is 17. The more teeth on the sprocket, the longer it will last. The height of the teeth is also important. A sprocket with more teeth will increase the life of the chain.

editor by Cx 2023-07-07