A simple drive unit for straight/curved lines, this gear rack with rollers can be used when you want to perform reciprocating motion in a straight line, or when you want to rotate or oscillate.

It has the same function as a rack and pinion, but is a power transmission component with different features and capabilities.

Unlike a chain and sprocket winding transmission, this is a transmission in which the teeth mesh together in a single gear.

While general drive sprockets use JIS standard S or U tooth profiles designed for winding transmission, the pin gears in Pin gear drive unit (PDU) use special tooth profiles.

The tooth shapes differ for straight and curved gears, and even for inscribed and circumscribed gears for curved gears.

Gear module is the pitch diameter of a gear divided by the number of teeth.

On the other hand, Pin gear drive unit (PDUs) use pitch as the frame number.

The PDU020 has a pitch of 20 mm.

The larger both are, the stronger they are.

The lineup includes 14 different frame sizes by pitch: PDU020, 022, 030, 035, 040, 050, 055, 070, 080, 090, 120, 150, 180, and 240.

The larger the frame number, the higher the tangential load.

It can also be used for lifting.

By setting the pin gear in the lifting section, a layout can be created that eliminates unnecessary steps when transferring between lifting sections.

Pin gear drive unit (PDU) takes up less space than a typical chain and sprocket winding transmission, contributing to a more compact overall device.

It is also easy to install and there is no need to replace the chain due to stretching.

Pin gear drive unit (PDU) has a unique meshing design that ensures reliable meshing even if the installation precision (center distance) is somewhat poor.

Also, unlike gear racks, the structure is designed to prevent disengagement due to the accumulation of foreign matter in the meshing area.

The pin gear meshing area has rollers that rotate, which is beneficial in terms of wear.

The pinwheel has a hollow structure consisting of a frame, pins, and rollers, making it lightweight and easy to handle.

The relatively large center distance makes installation easy.

In the case of oscillation, pinwheels can be manufactured with only the required rotation angle, making them economical.

The pin rack and pin wheel have a hollow structure consisting of a frame, pins, and rollers, making it difficult for foreign matter to accumulate.

On the other hand, if the dust is very small and gets stuck between the rollers and pins, the rollers will stick and stop rotating, which can cause abnormal wear, so caution and measures are required.

The pin gear is designed with an optimal tooth profile according to the pin rack and pin wheel that it is combined with.

Therefore, they are generally sold as a set.

Replacement parts will also be sold individually after confirming the drawing number on the delivery drawing.

If you are willing to accept a warranty on shape only (functionality is not guaranteed), we will consider selling pin gears, pin racks, and pin wheels individually, so please contact us for details.

Please fill out the necessary information on the "Selection Service Sheet" in the catalog and consult with our sales office or a distributor you have a business relationship with.

We also offer a selection service on the Tsubaki Power Transmission General Engineer Site TT-net.

Pin gear drive unit selection service

Any size equal to or larger than the selected model number can be used.

Although it is necessary to consider the balance with the size of the machinery, increasing the size may result in a reduction in the number of component parts such as rollers and pins, leading to cost reductions.

Also, for equipment that is assumed to be rarely operated or for equipment that uses two rows, it is possible to reduce the size, so please contact us.

For rust prevention measures (surface treatment specifications) for steel types, we offer black dyeing, electroless nickel-phosphorus plating, as well as our own highly rust-resistant specifications (compatible frame numbers: PDU030 to 120).

There is also a stainless steel type that is less strong but more corrosion resistant.

Can be used in outdoor environments where strength is required.

There are also cases where it has been adopted in environments where it is exposed to seawater and where it requires stronger rust prevention than steel types.

Please contact us.

Please contact us as we may be able to accommodate your request.

However, ring-shaped integrated pinwheels cannot be made with high anti-rust specifications.

The mass of each part is indicated on the drawing.

Please check the drawing download service.

Drawing download service

We will consider using a specific lubricant if you have one.

In that case, we may ask you to provide lubricant, so please contact us to confirm if you are considering this.

Please contact us as we will consider material strength and availability.

The center distance is related to the backlash value.

The center distance can be further increased by manufacturing the pin gear tooth profile with a large backlash specification.

We also offer a flexible type with a larger center distance than the standard product.

It is possible to reduce the backlash to approximately 2/3 of the standard backlash (compatible frame numbers: PDU020 to 120), so please contact us for details.

In addition, we recommend using a friction lock type connection between the shaft and pin gear.

It is possible to support any device with more than the minimum number of pins.

You can check the dimensions by entering the desired number of rollers using the drawing download service.

*There is a limit to the number of rollers that can be downloaded, so please contact us if this is the case.

Drawing download service

Because it is a segmented system, you can line up and connect as many as you need, and there are no restrictions on length or diameter.

You can purchase pinwheels for just the angle you need.

However, each segment must have at least the minimum number of pins.

For ring-shaped integrated types, there are upper limits to the frame number and diameter.

The diameter is approximately φ800.

Pinwheels can be manufactured in split or ring-shaped integrated form.

The convex portion is turned to serve as a reference (guide) surface during installation.

By providing a reference surface on the mounting base, it is possible to mount the product using the convex part as the reference (guide) surface.

There are no protrusions, but the entire inner or outer circumference has been milled to provide a reference (guide) surface.

Please consider the sizes available in the flexible type (large center distance and frame width clearance).

For types other than the flexible type, the method is basically to not increase the inner frame width, but to reduce the pin gear tooth width.

Please consider the sizes available in the flexible type (large center distance and frame width clearance).

Sizes smaller than PDU040 are not available, but it is possible to reduce the tooth width.

The limit is up to 2/3 of the standard tooth width.

The allowable tangential load will decrease, but the degree of decrease will change depending on the material, so please contact us for details.

We can process shaft hole diameters, keyways, tapping, etc. as specified by the customer.

Friction fastening lock type is also available.

Please specify the dimensions when requesting a quote.

It can be changed.

Please specify your desired dimensions when requesting a quote.

However, if there is a specified shaft hole diameter, it may not be possible to provide sufficient strength due to factors such as the hub diameter.

The steel type pin gears have hardened tooth tips.

Stainless steel types cannot be hardened.

Selection is possible, but there is a limit to the minimum number of teeth.

Please select from the selection and drawing download service below.

Pin gear drive unit selection service

Drawing download service

This is listed in the "Pin gear applicable tooth number range" on the "Pin gear drive selection procedure" page of the catalog.

For tooth number ranges marked with △, the allowable tangential load is lower than the catalog value, so please contact us.

We can accommodate your request.

We will consider it, so please contact us with your specifications and specify the operating conditions and shaft hole diameter.

[Reference] Lock Sprocket

We can accommodate your request.

It is necessary to check whether it can be assembled.

When requesting a quote, please let us know the model number of Mechanical protector you require.

[Reference] Mechanical protector

Yes, it is supported.

This specification has an increased center distance tolerance and also an increased gap between the pin rack/pin wheel and pin gear.

It is ideal for driving kiln dryers and other devices that require strict installation precision or clearance to allow for thermal expansion.

If the frame size is compatible with the flexible type, you can also use a combination of flexible type pin gear and steel type pin rack/pin wheel.

In this case, the allowable tangential load and backlash will be the values for the flexible type.

Please refer to the "Installation Method" and "Installation Accuracy" listed in the catalog.

Please use at least the minimum number of bolts of the specified size per segment when installing.

Basically, please install by butting them together.

Even if there is a gap, if it is 0.2 mm or less, the pin gear can be transferred.

This feature can be used to prevent segments from colliding with each other, such as in a turntable for changing direction.

Please use Pin gear drive unit (PDU) with oil.

Before operation, be sure to apply extreme pressure grease to the outer surfaces of all rollers.

Regular lubrication will ensure long-term use.

The product is initially coated with simple rust prevention oil before shipping, but this does not provide any lubrication.

Be sure to lubricate.

Cannot be used.

The tooth shape of the pin gear varies depending on the drive system and the number of pins on the pin wheel.

Therefore, the pin gears are special types for both external and internal contact.

Cannot be used.

The tooth shape of the pin gear varies depending on the number of pins on the pin wheel and the drive method.

Therefore, the pin gear is a special type that corresponds to the number of pins on the pin wheel.

This occurs when the pin gear teeth are worn or when the rollers on the pin rack and pin wheel are worn.

The replacement times for pin gears and pin racks/pin wheels are different, and as the pin rack/pin wheel gets longer (larger), the pin gear will usually wear out first. After that, the rollers that make up the pin rack/pin wheel will wear down and the backlash will increase.

If the rollers are worn, the pins that support them will also be worn.

There are concerns about increased backlash and insufficient strength, so please be prepared to replace it.

As the amount of wear increases, the backlash first increases.

Please note that with steel types, wear will progress rapidly once the hardened layer on the tooth tip wears off.

Please contact us regarding lifespan as tooth shape varies depending on specifications.

This occurs when the rollers, which are components, become worn.

If the rollers are worn, the pins that support them will also be worn.

There are concerns about increased backlash and insufficient strength, so please be prepared to replace it.

Pin gear drive unit (PDU) is designed to have a unique meshing between the pin gear, pin rack, and pin wheel, so it is generally sold as a unit.

The tooth profile of the pin gear is designed to match the pin rack and pin wheel that it is paired with, so if you are purchasing it as a replacement part, please also let us know the drawing number of the delivery drawing.

If you are willing to guarantee only the shape (functionality is not guaranteed), we will also consider selling the pin gear or pin rack/pin wheel separately.

Please contact us.

In the event of an emergency such as a line stop, we will respond upon consultation, but we generally recommend replacing all segments at the same time.

Unless there is clearly a lot of pin gear engagement in only some segments due to driving conditions, there is concern that other segments are also wearing out.