List of machine elements

• Atomically precise bearings
  – Atomically precise slide bearings
  – Atomically precise roller gearbearings
• Attachment chains
• Rigid chain actuators
• ...

Related

• Examples of diamondoid molecular machine elements

External links

Positive locking devices

• tab washers (Category:Tab_washers)
• Castellated nut
• ... (wiki-TODO: add own invention)

Self centering & form closure mechanisms:

• Firtree joint (wiktionary)
• Dovetail joint
• Hirth joint

Clutches (mechanical analogon to electrical transistors)

• Wrap-spring clutch
• ...

Spring based (energetic) locking mechanisms:

• Snap shackle
• Panic snap

Gears, bearings, gearbearings:

• Tapered roller bearing
• Gear bearing
• Trunnion

Rotating shaft couplings

Wikipedia: Category:Rotating_shaft_couplings

Axle across angle mechanisms:

• universal joint (does not preserve constant rotation speed) - double Cardan joint does

In general: CV joints [1]

• double Cardan joint does (2 universal joints)
• tripod joint – Video: 2014-04-04 – thang010146 – Tripod joint 1
• Tracta joint
• Rzeppa joint (depends on balls)

Off center axle continuation mechanismss:

• Oldham coupling
• Schmidt coupling

Chains:

• conveyor/attachment chain
• Flat chain
• Sprocket

Rigid chain mechanisms:

• Rigid chain actuator
• Rigid belt actuator

Gentle bending high degree of motion flextures:

• Scrollerwheel
• Rolamite, expireed US patent: [2]
  Video: 2020-11-15 – thang010146 – Rolamite 1
• compliant rolling-contact joints – Video: 2021-07-02 by "The FACTs of Mechanical Design"

Larger system design principles

Cartesian:

• H-Bot – Video: 2016-10-10 – thang010146 – Controlling two linear motions of an object 1a
• CoreXY (wikipedia) CoreXY & H-Bot (reprap.org)
• https://reprap.org/wiki/Mechanical_arrangement

Parallel SCARA designs:

• RepRap Morgan – by Quentin Harley
• RepRap Walle – by Nicholas Seward

Serial SCARA designs:

• RepRap Helios & RepRap Wheelios – by Nicholas Seward