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American Classic Cam Plate Design

The full name is "Six Pawl Cam Actuated Engagement System." This design is one of the more complicated ones, but according to American Classic provides a stronger freehub with relatively low resistance and causes all 6 double tooth pawls to engage simultaneously with high precision.

Mechanism

There are several parts to the engagement of this mechanism, listed in order of actuation from the chain/cog:

  • Wire spring in freehub body engages the..
  • Cam plate inside hub which engages the..
  • Pawls in the hub body which lock the freehub to the hub body

The wire spring rests on the hub side of the freehub body inside a circumferential track:

enter image description here

enter image description here

This wire moves along the teeth of the cam plate as the wheel freewheels. If power is applied to the pedals, this wire forces a clockwise movement of the cam plate

enter image description here
shown with one pawl removed and pawls in 'engaged' position

This clockwise movement forces the pawls to move inward and engage the freehub body, providing engagement.

enter image description here

This video below shows the action of the cam plate, the screwdriver is acting as the wire spring. This is another helpful video in which designer Bill Shook explains the mechanism. At ~0:33 you can see the whole mechanism in action via cutaway.

Once the freehub moves more slowly than the wheel, the freehub body itself moves the pawls back into their retracted state as well as the cam plate.

Advantages and Disadvantages

Advantages

  • Low resistance, the only things in contact are the cam plate and wire spring
  • As these are the only parts in constant contact, replacement parts are minimal
  • Sturdy, as the contact surfaces are relatively large
  • Lighter? particularly for it's strength. Part of the design goals was to make the freehub body/contact surface and pawls out of aluminum, although I don't have any numbers here

Disadvantages

  • Whether or not this relates to production cost, these are only available on Am Classic wheels and these wheels are generally expensive, so therefore obtaining a wheelset with this design is expensive.
  • Relatively low engagement - 24 points >means 360/24 = 15 degree engagement

American Classic Cam Plate Design

The full name is "Six Pawl Cam Actuated Engagement System." This design is one of the more complicated ones, but according to American Classic provides a stronger freehub with relatively low resistance and causes all 6 double tooth pawls to engage simultaneously with high precision.

Mechanism

There are several parts to the engagement of this mechanism, listed in order of actuation from the chain/cog:

  • Wire spring in freehub body engages the..
  • Cam plate inside hub which engages the..
  • Pawls in the hub body which lock the freehub to the hub body

The wire spring rests on the hub side of the freehub body inside a circumferential track:

enter image description here

enter image description here

This wire moves along the teeth of the cam plate as the wheel freewheels. If power is applied to the pedals, this wire forces a clockwise movement of the cam plate

enter image description here
shown with one pawl removed and pawls in 'engaged' position

This clockwise movement forces the pawls to move inward and engage the freehub body, providing engagement.

enter image description here

This video below shows the action of the cam plate, the screwdriver is acting as the wire spring. This is another helpful video in which designer Bill Shook explains the mechanism. At ~0:33 you can see the whole mechanism in action via cutaway.

Once the freehub moves more slowly than the wheel, the freehub body itself moves the pawls back into their retracted state as well as the cam plate.

Advantages and Disadvantages

Advantages

  • Low resistance, the only things in contact are the cam plate and wire spring
  • As these are the only parts in constant contact, replacement parts are minimal
  • Sturdy, as the contact surfaces are relatively large

Disadvantages

  • Whether or not this relates to production cost, these are only available on Am Classic wheels and these wheels are generally expensive, so therefore obtaining a wheelset with this design is expensive.
  • Relatively low engagement - 24 points > 360/24 = 15 degree engagement

American Classic Cam Plate Design

The full name is "Six Pawl Cam Actuated Engagement System." This design is one of the more complicated ones, but according to American Classic provides a stronger freehub with relatively low resistance and causes all 6 double tooth pawls to engage simultaneously with high precision.

Mechanism

There are several parts to the engagement of this mechanism, listed in order of actuation from the chain/cog:

  • Wire spring in freehub body engages the..
  • Cam plate inside hub which engages the..
  • Pawls in the hub body which lock the freehub to the hub body

The wire spring rests on the hub side of the freehub body inside a circumferential track:

enter image description here

enter image description here

This wire moves along the teeth of the cam plate as the wheel freewheels. If power is applied to the pedals, this wire forces a clockwise movement of the cam plate

enter image description here
shown with one pawl removed and pawls in 'engaged' position

This clockwise movement forces the pawls to move inward and engage the freehub body, providing engagement.

enter image description here

This video below shows the action of the cam plate, the screwdriver is acting as the wire spring. This is another helpful video in which designer Bill Shook explains the mechanism. At ~0:33 you can see the whole mechanism in action via cutaway.

Once the freehub moves more slowly than the wheel, the freehub body itself moves the pawls back into their retracted state as well as the cam plate.

Advantages and Disadvantages

Advantages

  • Low resistance, the only things in contact are the cam plate and wire spring
  • As these are the only parts in constant contact, replacement parts are minimal
  • Sturdy, as the contact surfaces are relatively large
  • Lighter? particularly for it's strength. Part of the design goals was to make the freehub body/contact surface and pawls out of aluminum, although I don't have any numbers here

Disadvantages

  • Whether or not this relates to production cost, these are only available on Am Classic wheels and these wheels are generally expensive, so therefore obtaining a wheelset with this design is expensive.
  • Relatively low engagement - 24 points means 360/24 = 15 degree engagement
4 added 531 characters in body
source | link

American Classic Cam Plate Design

The full name is "Six Pawl Cam Actuated Engagement System." This design is one of the more complicated ones, but according to American Classic provides a stronger freehub with relatively low resistance and causes all 6 double tooth pawls to engage simultaneously with high precision.

Mechanism

There are several parts to the engagement of this mechanism, listed in order of actuation from the chain/cog:

  • Wire spring in freehub body engages the..
  • Cam plate inside hub which engages the..
  • Pawls in the hub body which lock the freehub to the hub body

The wire spring rests on the hub side of the freehub body inside a circumferential track:

enter image description here

enter image description here

This wire moves along the teeth of the cam plate as the wheel freewheels. If power is applied to the pedals, this wire forces a clockwise movement of the cam plate

enter image description here
shown with one pawl removed and pawls in 'engaged' position

This clockwise movement forces the pawls to move inward and engage the freehub body, providing engagement.

enter image description here

This video below shows the action of the cam plate, the screwdriver is acting as the wire spring. This is another helpful video in which designer Bill Shook explains the mechanism. At ~0:33 you can see the whole mechanism in action via cutaway.

Once the freehub moves more slowly than the wheel, the freehub body itself moves the pawls back into their retracted state as well as the cam plate.

Under Construction - feel free to editAdvantages and Disadvantages

Advantages

  • Low resistance, the only things in contact are the cam plate and wire spring
  • As these are the only parts in constant contact, replacement parts are minimal
  • Sturdy, as the contact surfaces are relatively large

Disadvantages

  • Whether or not this relates to production cost, these are only available on Am Classic wheels and these wheels are generally expensive, so therefore obtaining a wheelset with this design is expensive.
  • Relatively low engagement - 24 points > 360/24 = 15 degree engagement

American Classic Cam Plate Design

The full name is "Six Pawl Cam Actuated Engagement System." This design is one of the more complicated ones, but according to American Classic provides a stronger freehub with relatively low resistance and causes all 6 double tooth pawls to engage simultaneously with high precision.

Mechanism

There are several parts to the engagement of this mechanism, listed in order of actuation from the chain/cog:

  • Wire spring in freehub body engages the..
  • Cam plate inside hub which engages the..
  • Pawls in the hub body which lock the freehub to the hub body

The wire spring rests on the hub side of the freehub body inside a circumferential track:

enter image description here

enter image description here

This wire moves along the teeth of the cam plate as the wheel freewheels. If power is applied to the pedals, this wire forces a clockwise movement of the cam plate

enter image description here
shown with one pawl removed and pawls in 'engaged' position

This clockwise movement forces the pawls to move inward and engage the freehub body, providing engagement.

enter image description here

This video below shows the action of the cam plate, the screwdriver is acting as the wire spring. This is another helpful video in which designer Bill Shook explains the mechanism. At ~0:33 you can see the whole mechanism in action via cutaway.

Once the freehub moves more slowly than the wheel, the freehub body itself moves the pawls back into their retracted state as well as the cam plate.

Under Construction - feel free to edit

American Classic Cam Plate Design

The full name is "Six Pawl Cam Actuated Engagement System." This design is one of the more complicated ones, but according to American Classic provides a stronger freehub with relatively low resistance and causes all 6 double tooth pawls to engage simultaneously with high precision.

Mechanism

There are several parts to the engagement of this mechanism, listed in order of actuation from the chain/cog:

  • Wire spring in freehub body engages the..
  • Cam plate inside hub which engages the..
  • Pawls in the hub body which lock the freehub to the hub body

The wire spring rests on the hub side of the freehub body inside a circumferential track:

enter image description here

enter image description here

This wire moves along the teeth of the cam plate as the wheel freewheels. If power is applied to the pedals, this wire forces a clockwise movement of the cam plate

enter image description here
shown with one pawl removed and pawls in 'engaged' position

This clockwise movement forces the pawls to move inward and engage the freehub body, providing engagement.

enter image description here

This video below shows the action of the cam plate, the screwdriver is acting as the wire spring. This is another helpful video in which designer Bill Shook explains the mechanism. At ~0:33 you can see the whole mechanism in action via cutaway.

Once the freehub moves more slowly than the wheel, the freehub body itself moves the pawls back into their retracted state as well as the cam plate.

Advantages and Disadvantages

Advantages

  • Low resistance, the only things in contact are the cam plate and wire spring
  • As these are the only parts in constant contact, replacement parts are minimal
  • Sturdy, as the contact surfaces are relatively large

Disadvantages

  • Whether or not this relates to production cost, these are only available on Am Classic wheels and these wheels are generally expensive, so therefore obtaining a wheelset with this design is expensive.
  • Relatively low engagement - 24 points > 360/24 = 15 degree engagement
3 added 91 characters in body
source | link

American Classic Cam Plate Design

The full name is "Six Pawl Cam Actuated Engagement System." This design is one of the more complicated ones, but according to American Classic provides a stronger freehub with relatively low resistance and causes all 6 double tooth pawls to engage simultaneously with high precision.

Mechanism

There are several parts to the engagement of this mechanism, listed in order of actuation from the chain/cog:

  • Wire spring in freehub body engages the..
  • Cam plate inside hub which engages the..
  • Pawls in the hub body which lock the freehub to the hub body

The wire spring rests on the hub side of the freehub body inside a circumferential track:

enter image description here

enter image description here

This wire moves along the teeth of the cam plate as the wheel freewheels. If power is applied to the pedals, this wire forces a clockwise movement of the cam plate

enter image description here
shown with one pawl removed and pawls in 'engaged' position

This clockwise movement forces the pawls to move inward and engage the freehub body, providing engagement.

enter image description here

This video below shows the action of the cam plate, the screwdriver is acting as the wire spring. This is another helpful video in which designer Bill Shook explains the mechanism. At ~0:33 you can see the whole mechanism in action via cutaway.

Once the freehub moves more slowly than the wheel, the freehub body itself moves the pawls back into their retracted state as well as the cam plate.

Under Construction - feel free to edit

American Classic Cam Plate Design

The full name is "Six Pawl Cam Actuated Engagement System." This design is one of the more complicated ones, but according to American Classic provides a stronger freehub with relatively low resistance and causes all 6 double tooth pawls to engage simultaneously with high precision.

Mechanism

There are several parts to the engagement of this mechanism, listed in order of actuation from the chain/cog:

  • Wire spring in freehub body engages the..
  • Cam plate inside hub which engages the..
  • Pawls in the hub body which lock the freehub to the hub body

The wire spring rests on the hub side of the freehub body inside a circumferential track:

enter image description here

enter image description here

This wire moves along the teeth of the cam plate as the wheel freewheels. If power is applied to the pedals, this wire forces a clockwise movement of the cam plate

enter image description here
shown with one pawl removed and pawls in 'engaged' position

This clockwise movement forces the pawls to move inward and engage the freehub body, providing engagement. This video below shows the action of the cam plate, the screwdriver is acting as the wire spring. This is another helpful video in which designer Bill Shook explains the mechanism. At ~0:33 you can see the whole mechanism in action via cutaway.

Once the freehub moves more slowly than the wheel, the freehub body itself moves the pawls back into their retracted state as well as the cam plate.

Under Construction - feel free to edit

American Classic Cam Plate Design

The full name is "Six Pawl Cam Actuated Engagement System." This design is one of the more complicated ones, but according to American Classic provides a stronger freehub with relatively low resistance and causes all 6 double tooth pawls to engage simultaneously with high precision.

Mechanism

There are several parts to the engagement of this mechanism, listed in order of actuation from the chain/cog:

  • Wire spring in freehub body engages the..
  • Cam plate inside hub which engages the..
  • Pawls in the hub body which lock the freehub to the hub body

The wire spring rests on the hub side of the freehub body inside a circumferential track:

enter image description here

enter image description here

This wire moves along the teeth of the cam plate as the wheel freewheels. If power is applied to the pedals, this wire forces a clockwise movement of the cam plate

enter image description here
shown with one pawl removed and pawls in 'engaged' position

This clockwise movement forces the pawls to move inward and engage the freehub body, providing engagement.

enter image description here

This video below shows the action of the cam plate, the screwdriver is acting as the wire spring. This is another helpful video in which designer Bill Shook explains the mechanism. At ~0:33 you can see the whole mechanism in action via cutaway.

Once the freehub moves more slowly than the wheel, the freehub body itself moves the pawls back into their retracted state as well as the cam plate.

Under Construction - feel free to edit

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