China Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears gear ratio calculator

Product Description

BHT Injection Description

 

 BHT Injection Principal Enterprise – Plastic Injection Mildew(mould): CZPT Planning, CZPT production, CZPT Upkeep
– Plastic Injection Items: Injection molding products processing, Injection molding product planning, provide remedy,  Injection molding complex support
– Injection Goods Assembling: Injection molding product assembly. printing
– Granulation: Plastic Alloys, flame-retardant, bolstered and toughened plastics, and useful masterbatches.
 
2). BHT Injection mould A. Multiple main pulling
B. Automobile interior
C. 6 sets of motion measures

 

2K mould
Vehicle sector
Two variety: In-die rotation and products rotation
which are large complex requirements
A. Connector Mould
B.  Automobile, conversation
C. Substantial precision requirements
D. Quick forming cycle
E. Multi-Cavities
three). BHT Injection Products application -Vehicle parts

-Medical Task

-Electrical factors

-Digital components

-2K injection auto buttons for GAC
-2K injection vehicle rotating button for Geely 

-2K injection auto buttons for Honda
-Co-Injection

-Lens injection molding
-Silicone products
 

Connector
-Automotive terminal connectors
-Memory card
-Mobile phone connector
-Honda Connector
-Tank connector terminals
-Communication terminals
-SIM card holder
-USB Charging interface
-apple iphone 6 Interaction antennas

 

Paint/print/laser/PVD/gilding /Electroplate Gloss paint

Matte paint 

Electroplate

PVD

Gilding

 

Injection Goods Photos

 

 

BHT Injection Devices

BHT Currrent Injection Equipment (Whole 48 sets) Product Qty
2K Injection Equipment (FCS) 160T twelve sets
2K Injection Machines (FCS) 220-230T five sets
2K Injection Machines (Haitian) 250T 4 sets
2K Injection Machines (FCS) 280T one established
1K Injection Devices (Japan NISSEL)  7T one set
1K Injection Devices (Japan SUMITOMO) 50T 2 sets
1K Injection Devices (Yizumi) 60T 1 set
1K Injection Equipment (Japan JSW) 70T one established
1K Injection Machines (Yizumi) 90T 6 sets
1K Injection Machines (Yizumi) 120T 5 sets
1K Injection Machines  150T 2 sets
1K Injection Machines (Yizumi) 160T 2 sets
1K Injection Machines (Yizumi) 260T 2 sets
1K Injection Machines (ZHAFIR) 360T 2 sets
Vertical injection molding device (AIKE)  55T  2 sets

 

Injection Moulds Workshop

Mould material five#, 50#, P20, H13, 718, 2738, NAK80, S136, SKD61 etc.
Hardness of metal Vacuum quenching, nitride, hrc41-forty seven, hrc46-fifty, hrc60
Mould foundation LKM, HASCO
Cavity Solitary / Multi
Runner Scorching / Cold
Ejection method Motor/hydraulic cylinder/stripping plate/angle pin, and so forth
Design software program UG, PROE, CAD, CAXA and many others.

Principal Processing Equipemnts Brand Qty
CNC Machine Middle MIKRON, Swiss  
CNC EDM Sodick, Japan 7 sets
WEDM MITSUBISHI, Japan one established
Piercer KTC,Korea one set
EDM MINFYA, China ZheJiang one established
EDM QUNJI one established
EDM DIMENG four sets
Grinding equipment HYFAIR six sets
Milling Equipment HUAQUN 3 sets
CMM 2.5 Dimension HEXAGON, Sweden one set
Microscope NIKON,Japan one set
CMM 3 Dimension HEXAGON, Sweden 1 established
Profile projector NIKON,Japan 2 sets
Profile projector Crotechni, Italy 1 established
others: Hardness tester, Calipers, Micrometer, Protractor, Top gauge, Dial gauge, Coating Thickness Gauge, and many others..

 

 

 

Granulation Workshop

 

 

BHT Goods Warehouse

 

BHT Factory Tour

 

BHT Clientele

BHT have exported the goods to sixty five international locations (Germany, Sweden, Hungary, Italy, Netherlands, Spain, Portugal, Czech Republic, Lithuania, Serbia, Greece, Malta, Austria, Kosovo, Turkey, Ukraine, Albania, Estonia, Belarus, Bulgaria, Bosnia, Croatia, Romania,Usa, Brazil, Argentina, Mexico, Xihu (West Lake) Dis.through, Colombia, Canada, Peru, Chile, Australia, New Zealand, Rwanda, Egypt, South Africa, Tanzania, Nigeria, Botswana, Mauritius, Russia, Vietnam, India, Iran, Singapore, Uzbekistan, Thailand, Sri Lanka, Bangladesh, Malaysia, Kazakhstan, Philippines, Bahrain, Pakistan, United Arab Emirates, Kuwait, Saudi Arabia, Sudan, Jordan, Oman, Qatar, Syria, Israel, Yemen)

 

US $0.2-5
/ Piece
|
1,000 Pieces

(Min. Order)

###

Material: PVC
Application: Medical, Household, Electronics, Automotive, Agricultural
Certification: TS16949, RoHS, ISO
Plastic Material: ABS, GPPS, HIPS, as, Ms, PC, PA6, PA66, PA+G
Processing Technology: Polishing, Blasting, Heat Treatment, Painting
Injection Advantage: Two Shots Mold & Double Color Injection

###

Samples:
US$ 1/Piece
1 Piece(Min.Order)

|
Request Sample

###

Customization:

###

 BHT Injection Main Business – Plastic Injection Mold(mould): Mould Designing, Mould manufacturing, Mould Maintenance;
– Plastic Injection Products: Injection molding products processing, Injection molding product designing, provide solution,  Injection molding technical service;
– Injection Products Assembling: Injection molding product assembly. printing;
– Granulation: Plastic Alloys, flame-retardant, reinforced and toughened plastics, and functional masterbatches.
 
2). BHT Injection mold A. Multiple core pulling
B. Car interior
C. Six sets of action steps

 

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
2K mould
Automobile industry
Two type: In-die rotation and equipment rotation
which are high technical requirements
A. Connector Mould
B.  Automobile, communication
C. High accuracy requirements
D. Fast forming cycle
E. Multi-Cavities
3). BHT Injection Products application -Automobile parts

-Medical Project

-Electrical components

-Electronic components

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
-2K injection auto buttons for GAC
-2K injection auto rotating button for Geely 

-2K injection auto buttons for Honda
-Co-Injection

-Lens injection molding
-Silicone products
 

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Connector
-Automotive terminal connectors
-Memory card
-Phone connector
-Honda Connector
-Tank connector terminals
-Communication terminals
-SIM card holder
-USB Charging interface
-iphone 6 Communication antennas

 

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Paint/print/laser/PVD/gilding /Electroplate Gloss paint

Matte paint 

Electroplate

PVD

Gilding

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

BHT Currrent Injection Machines (Total 48 sets) Model Qty
2K Injection Machines (FCS) 160T 12 sets
2K Injection Machines (FCS) 220-230T 5 sets
2K Injection Machines (Haitian) 250T 4 sets
2K Injection Machines (FCS) 280T 1 set
1K Injection Machines (Japan NISSEL)  7T 1 set
1K Injection Machines (Japan SUMITOMO) 50T 2 sets
1K Injection Machines (Yizumi) 60T 1 set
1K Injection Machines (Japan JSW) 70T 1 set
1K Injection Machines (Yizumi) 90T 6 sets
1K Injection Machines (Yizumi) 120T 5 sets
1K Injection Machines  150T 2 sets
1K Injection Machines (Yizumi) 160T 2 sets
1K Injection Machines (Yizumi) 260T 2 sets
1K Injection Machines (ZHAFIR) 360T 2 sets
Vertical injection molding machine (AIKE)  55T  2 sets

###

Mould material 5#, 50#, P20, H13, 718, 2738, NAK80, S136, SKD61 etc.
Hardness of steel Vacuum quenching, nitride, hrc41-47, hrc46-50, hrc60
Mould base LKM, HASCO
Cavity Single / Multi
Runner Hot / Cold
Ejection system Motor/hydraulic cylinder/stripping plate/angle pin, etc
Design software UG, PROE, CAD, CAXA etc.

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

Main Processing Equipemnts Brand Qty
CNC Machine Center MIKRON, Swiss  
CNC EDM Sodick, Japan 7 sets
WEDM MITSUBISHI, Japan 1 set
Piercer KTC,Korea 1 set
EDM MINFYA, China Taiwan 1 set
EDM QUNJI 1 set
EDM DIMENG 4 sets
Grinding machine HYFAIR 6 sets
Milling Machine HUAQUN 3 sets
CMM 2.5 Dimension HEXAGON, Sweden 1 set
Microscope NIKON,Japan 1 set
CMM 3 Dimension HEXAGON, Sweden 1 set
Profile projector NIKON,Japan 2 sets
Profile projector Crotechni, Italy 1 set
others: Hardness tester, Calipers, Micrometer, Protractor, Height gauge, Dial gauge, Coating Thickness Gauge, etc..

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

BHT have exported the products to 65 countries (Germany, Sweden, Hungary, Italy, Netherlands, Spain, Portugal, Czech Republic, Lithuania, Serbia, Greece, Malta, Austria, Kosovo, Turkey, Ukraine, Albania, Estonia, Belarus, Bulgaria, Bosnia, Croatia, Romania,USA, Brazil, Argentina, Mexico, Bolivia, Colombia, Canada, Peru, Chile, Australia, New Zealand, Rwanda, Egypt, South Africa, Tanzania, Nigeria, Botswana, Mauritius, Russia, Vietnam, India, Iran, Singapore, Uzbekistan, Thailand, Sri Lanka, Bangladesh, Malaysia, Kazakhstan, Philippines, Bahrain, Pakistan, United Arab Emirates, Kuwait, Saudi Arabia, Sudan, Jordan, Oman, Qatar, Syria, Israel, Yemen)
Plastic Gear Injection Molds, Injection Mold High Precision Plastic GearsPlastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
US $0.2-5
/ Piece
|
1,000 Pieces

(Min. Order)

###

Material: PVC
Application: Medical, Household, Electronics, Automotive, Agricultural
Certification: TS16949, RoHS, ISO
Plastic Material: ABS, GPPS, HIPS, as, Ms, PC, PA6, PA66, PA+G
Processing Technology: Polishing, Blasting, Heat Treatment, Painting
Injection Advantage: Two Shots Mold & Double Color Injection

###

Samples:
US$ 1/Piece
1 Piece(Min.Order)

|
Request Sample

###

Customization:

###

 BHT Injection Main Business – Plastic Injection Mold(mould): Mould Designing, Mould manufacturing, Mould Maintenance;
– Plastic Injection Products: Injection molding products processing, Injection molding product designing, provide solution,  Injection molding technical service;
– Injection Products Assembling: Injection molding product assembly. printing;
– Granulation: Plastic Alloys, flame-retardant, reinforced and toughened plastics, and functional masterbatches.
 
2). BHT Injection mold A. Multiple core pulling
B. Car interior
C. Six sets of action steps

 

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
2K mould
Automobile industry
Two type: In-die rotation and equipment rotation
which are high technical requirements
A. Connector Mould
B.  Automobile, communication
C. High accuracy requirements
D. Fast forming cycle
E. Multi-Cavities
3). BHT Injection Products application -Automobile parts

-Medical Project

-Electrical components

-Electronic components

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
-2K injection auto buttons for GAC
-2K injection auto rotating button for Geely 

-2K injection auto buttons for Honda
-Co-Injection

-Lens injection molding
-Silicone products
 

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Connector
-Automotive terminal connectors
-Memory card
-Phone connector
-Honda Connector
-Tank connector terminals
-Communication terminals
-SIM card holder
-USB Charging interface
-iphone 6 Communication antennas

 

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Paint/print/laser/PVD/gilding /Electroplate Gloss paint

Matte paint 

Electroplate

PVD

Gilding

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears
Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

BHT Currrent Injection Machines (Total 48 sets) Model Qty
2K Injection Machines (FCS) 160T 12 sets
2K Injection Machines (FCS) 220-230T 5 sets
2K Injection Machines (Haitian) 250T 4 sets
2K Injection Machines (FCS) 280T 1 set
1K Injection Machines (Japan NISSEL)  7T 1 set
1K Injection Machines (Japan SUMITOMO) 50T 2 sets
1K Injection Machines (Yizumi) 60T 1 set
1K Injection Machines (Japan JSW) 70T 1 set
1K Injection Machines (Yizumi) 90T 6 sets
1K Injection Machines (Yizumi) 120T 5 sets
1K Injection Machines  150T 2 sets
1K Injection Machines (Yizumi) 160T 2 sets
1K Injection Machines (Yizumi) 260T 2 sets
1K Injection Machines (ZHAFIR) 360T 2 sets
Vertical injection molding machine (AIKE)  55T  2 sets

###

Mould material 5#, 50#, P20, H13, 718, 2738, NAK80, S136, SKD61 etc.
Hardness of steel Vacuum quenching, nitride, hrc41-47, hrc46-50, hrc60
Mould base LKM, HASCO
Cavity Single / Multi
Runner Hot / Cold
Ejection system Motor/hydraulic cylinder/stripping plate/angle pin, etc
Design software UG, PROE, CAD, CAXA etc.

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

Main Processing Equipemnts Brand Qty
CNC Machine Center MIKRON, Swiss  
CNC EDM Sodick, Japan 7 sets
WEDM MITSUBISHI, Japan 1 set
Piercer KTC,Korea 1 set
EDM MINFYA, China Taiwan 1 set
EDM QUNJI 1 set
EDM DIMENG 4 sets
Grinding machine HYFAIR 6 sets
Milling Machine HUAQUN 3 sets
CMM 2.5 Dimension HEXAGON, Sweden 1 set
Microscope NIKON,Japan 1 set
CMM 3 Dimension HEXAGON, Sweden 1 set
Profile projector NIKON,Japan 2 sets
Profile projector Crotechni, Italy 1 set
others: Hardness tester, Calipers, Micrometer, Protractor, Height gauge, Dial gauge, Coating Thickness Gauge, etc..

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

###

BHT have exported the products to 65 countries (Germany, Sweden, Hungary, Italy, Netherlands, Spain, Portugal, Czech Republic, Lithuania, Serbia, Greece, Malta, Austria, Kosovo, Turkey, Ukraine, Albania, Estonia, Belarus, Bulgaria, Bosnia, Croatia, Romania,USA, Brazil, Argentina, Mexico, Bolivia, Colombia, Canada, Peru, Chile, Australia, New Zealand, Rwanda, Egypt, South Africa, Tanzania, Nigeria, Botswana, Mauritius, Russia, Vietnam, India, Iran, Singapore, Uzbekistan, Thailand, Sri Lanka, Bangladesh, Malaysia, Kazakhstan, Philippines, Bahrain, Pakistan, United Arab Emirates, Kuwait, Saudi Arabia, Sudan, Jordan, Oman, Qatar, Syria, Israel, Yemen)
Plastic Gear Injection Molds, Injection Mold High Precision Plastic GearsPlastic Gear Injection Molds, Injection Mold High Precision Plastic Gears

Synthesis of Epicyclic Gear Trains for Automotive Automatic Transmissions

In this article, we will discuss the synthesis of epicyclic gear trains for automotive automatic transmissions, their applications, and cost. After you have finished reading, you may want to do some research on the technology yourself. Here are some links to further reading on this topic. They also include an application in hybrid vehicle transmissions. Let’s look at the basic concepts of epicyclic gear trains. They are highly efficient and are a promising alternative to conventional gearing systems.
Gear

Synthesis of epicyclic gear trains for automotive automatic transmissions

The main purpose of automotive automatic transmissions is to maintain engine-drive wheel balance. The kinematic structure of epicyclic gear trains (EGTs) is derived from graph representations of these gear trains. The synthesis process is based on an algorithm that generates admissible epicyclic gear trains with up to ten links. This algorithm enables designers to design auto gear trains that have higher performance and better engine-drive wheel balance.
In this paper, we present a MATLAB optimization technique for determining the gear ratios of epicyclic transmission mechanisms. We also enumerate the number of teeth for all gears. Then, we estimate the overall velocity ratios of the obtained EGTs. Then, we analyze the feasibility of the proposed epicyclic gear trains for automotive automatic transmissions by comparing their structural characteristics.
A six-link epicyclic gear train is depicted in the following functional diagram. Each link is represented by a double-bicolor graph. The numbers on the graph represent the corresponding links. Each link has multiple joints. This makes it possible for a user to generate different configurations for each EGT. The numbers on the different graphs have different meanings, and the same applies to the double-bicolor figure.
In the next chapter of this article, we discuss the synthesis of epicyclic gear trains for automotive automatic transaxles. SAE International is an international organization of engineers and technical experts with core competencies in aerospace and automotive. Its charitable arm, the SAE Foundation, supports many programs and initiatives. These include the Collegiate Design Series and A World In Motion(r) and the SAE Foundation’s A World in Motion(r) award.
Gear

Applications

The epicyclic gear system is a type of planetary gear train. It can achieve a great speed reduction in a small space. In cars, epicyclic gear trains are often used for the automatic transmission. These gear trains are also useful in hoists and pulley blocks. They have many applications in both mechanical and electrical engineering. They can be used for high-speed transmission and require less space than other types of gear trains.
The advantages of an epicyclic gear train include its compact structure, low weight, and high power density. However, they are not without disadvantages. Gear losses in epicyclic gear trains are a result of friction between gear tooth surfaces, churning of lubricating oil, and the friction between shaft support bearings and sprockets. This loss of power is called latent power, and previous research has demonstrated that this loss is tremendous.
The epicyclic gear train is commonly used for high-speed transmissions, but it also has a small footprint and is suitable for a variety of applications. It is used as differential gears in speed frames, to drive bobbins, and for the Roper positive let-off in looms. In addition, it is easy to fabricate, making it an excellent choice for a variety of industrial settings.
Another example of an epicyclic gear train is the planetary gear train. It consists of two gears with a ring in the middle and the sun gear in the outer ring. Each gear is mounted so that its center rotates around the ring of the other gear. The planet gear and sun gear are designed so that their pitch circles do not slip and are in sync. The planet gear has a point on the pitch circle that traces the epicycloid curve.
This gear system also offers a lower MTTR than other types of planetary gears. The main disadvantage of these gear sets is the large number of bearings they need to run. Moreover, planetary gears are more maintenance-intensive than parallel shaft gears. This makes them more difficult to monitor and repair. The MTTR is also lower compared to parallel shaft gears. They can also be a little off on their axis, causing them to misalign or lose their efficiency.
Another example of an epicyclic gear train is the differential gear box of an automobile. These gears are used in wrist watches, lathe machines, and automotives to transmit power. In addition, they are used in many other applications, including in aircrafts. They are quiet and durable, making them an excellent choice for many applications. They are used in transmission, textile machines, and even aerospace. A pitch point is the path between two teeth in a gear set. The axial pitch of one gear can be increased by increasing its base circle.
An epicyclic gear is also known as an involute gear. The number of teeth in each gear determines its rate of rotation. A 24-tooth sun gear produces an N-tooth planet gear with a ratio of 3/2. A 24-tooth sun gear equals a -3/2 planet gear ratio. Consequently, the epicyclic gear system provides high torque for driving wheels. However, this gear train is not widely used in vehicles.
Gear

Cost

The cost of epicyclic gearing is lower when they are tooled rather than manufactured on a normal N/C milling machine. The epicyclic carriers should be manufactured in a casting and tooled using a single-purpose machine that has multiple cutters to cut the material simultaneously. This approach is widely used for industrial applications and is particularly useful in the automotive sector. The benefits of a well-made epicyclic gear transmission are numerous.
An example of this is the planetary arrangement where the planets orbit the sun while rotating on its shaft. The resulting speed of each gear depends on the number of teeth and the speed of the carrier. Epicyclic gears can be tricky to calculate relative speeds, as they must figure out the relative speed of the sun and the planet. The fixed sun is not at zero RPM at mesh, so the relative speed must be calculated.
In order to determine the mesh power transmission, epicyclic gears must be designed to be able to “float.” If the tangential load is too low, there will be less load sharing. An epicyclic gear must be able to allow “float.” It should also allow for some tangential load and pitch-line velocities. The higher these factors, the more efficient the gear set will be.
An epicyclic gear train consists of two or more spur gears placed circumferentially. These gears are arranged so that the planet gear rolls inside the pitch circle of the fixed outer gear ring. This curve is called a hypocycloid. An epicyclic gear train with a planet engaging a sun gear is called a planetary gear train. The sun gear is fixed, while the planet gear is driven.
An epicyclic gear train contains several meshes. Each gear has a different number of meshes, which translates into RPM. The epicyclic gear can increase the load application frequency by translating input torque into the meshes. The epicyclic gear train consists of 3 gears, the sun, planet, and ring. The sun gear is the center gear, while the planets orbit the sun. The ring gear has several teeth, which increases the gear speed.
Another type of epicyclic gear is the planetary gearbox. This gear box has multiple toothed wheels rotating around a central shaft. Its low-profile design makes it a popular choice for space-constrained applications. This gearbox type is used in automatic transmissions. In addition, it is used for many industrial uses involving electric gear motors. The type of gearbox you use will depend on the speed and torque of the input and output shafts.

China Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears     gear ratio calculatorChina Plastic Gear Injection Molds, Injection Mold High Precision Plastic Gears     gear ratio calculator
editor by czh 2022-12-13

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