Definition
Supported movements define the reference movement set used within HorologyCAD for movement-led watch case design.
Each movement creates a different case-design problem. Diameter, height, stem position, dial layout, rotor clearance, movement securing, tolerance behaviour, and caseback geometry all change depending on the movement selected.
For that reason, supported movements are not treated as interchangeable components. They are engineering references.
A case designed correctly around one movement should not be assumed to fit another movement without checking the full movement geometry and the case architecture built around it.
HorologyCAD is not a single-movement site. It is a movement-led watch case design system built around defined mechanical reference movements.
For the full site structure, return to the HorologyCAD homepage.
Why Supported Movements Matter
Watch case design begins with the movement.
The movement defines the internal starting point for the case. It controls:
- movement diameter
- movement height
- stem height
- crown and stem axis
- dial position
- hand stack relationship
- date or small seconds layout
- rotor clearance
- caseback depth
- movement securing method
- internal case geometry
- radial clearance
- axial clearance
- tolerance stack behaviour
- assembly sequence
A defined movement set gives HorologyCAD a controlled engineering foundation.
Instead of explaining watch case design in generic terms, HorologyCAD uses real movement architectures to show how case geometry changes when the movement changes.
Incorrect movement choice, or casual movement substitution, can result in:
- misalignment between movement and case
- incorrect crown and stem position
- movement fit problems
- dial or hand clearance failure
- rotor interference
- caseback stack errors
- incorrect internal geometry
- failed sealing systems
- poor manufacturability
- assembly incompatibility
There is no universal watch case solution.
A functional watch case must be designed around the specific movement being used.
Supporting pages:
→ Movement Selection
→ Watch Movement Dimensions Explained
→ Movement-Led Watch Case Design
Principle of Movement-Specific Design
Each supported movement requires its own movement-led case architecture.
That architecture must define:
- movement cavity geometry
- radial clearance
- axial clearance
- movement holder or securing method
- stem and crown alignment
- dial-side stack
- caseback clearance
- rotor clearance where applicable
- sealing geometry
- tolerance strategy
- assembly order
- manufacturing constraints
Movements cannot be substituted casually.
Even movements that share the same nominal diameter may differ in:
- total height
- stem height
- date position
- dial feet position
- hand stack height
- rotor envelope
- caseback clearance requirement
- movement holder strategy
- securing method
- service clearance requirement
- tolerance behaviour
A movement may belong to the same broad family or diameter class as another calibre, but the final case should always be checked against the exact movement being used.
Supporting pages:
→ Internal Case Geometry & Movement Cavity Sizing
→ Radial Clearance
→ Axial Clearance
Core Supported Movement Set
HorologyCAD uses a defined set of reference movements.
This set is not random. Each movement represents a useful case-design category:
- standard Swiss automatic
- slim Swiss automatic
- Japanese automatic
- large hand-wound
- legacy Swiss automatic
- modern Sellita slim automatic
The purpose is not to create a universal movement-fitting system.
The purpose is to explain how watch case design changes across different movement architectures.
The current supported movement set includes:
- Sellita SW200-1
- Miyota 9015
- Seiko NH35 / NH36
- ETA 2892-A2
- ETA 6497
- ETA 2824-2
- Sellita SW300-1
Sellita SW200-1
The Sellita SW200-1 is the primary standard automatic reference movement within HorologyCAD.
It is useful because it represents a common 25.60 mm Swiss automatic architecture used in many modern mechanical watch projects.
Key case-design characteristics include:
- 25.60 mm movement diameter
- approximately 4.60 mm movement height
- automatic rotor
- central seconds
- date configuration
- standard automatic caseback planning
- crown and stem alignment
- movement securing requirements
- radial and axial clearance control
The SW200-1 is especially useful for understanding standard automatic movement-to-case fit.
It represents the type of movement where rotor clearance, caseback depth, stem alignment, and movement retention all need to be controlled together.
Supporting pages:
→ SW200-1 Dimensions & Technical Data
→ SW200-1 Case Design Guide
→ SW200-1 Case Design Constraints
Miyota 9015
The Miyota 9015 is a slim Japanese automatic movement used as a reference for thinner automatic case design.
It is useful because it has a thinner architecture than many standard automatic movements while still requiring rotor clearance, crown alignment, dial-side stack control, and caseback planning.
Key case-design characteristics include:
- 26.00 mm movement diameter
- approximately 3.90 mm movement height
- automatic rotor
- slim automatic architecture
- different dimensional behaviour from Swiss 25.60 mm movements
- thin-case planning requirements
- movement securing and tolerance control
The Miyota 9015 should not be treated as a generic substitute for a Swiss automatic movement.
It requires its own case architecture, especially where thin-case planning, movement support, and stem alignment are concerned.
Supporting pages:
→ Miyota 9015 Dimensions & Technical Data for Watch Case Design
→ Miyota 9015 Case Design Guide
→ Miyota 9015 Case Design Constraints
Seiko NH35 / NH36
The Seiko NH35 and NH36 movements are common Japanese automatic movements used widely in custom builds, modding, and microbrand development.
They are useful because they represent a different case-design category from Swiss 25.60 mm movements and slimmer automatic movements such as the Miyota 9015.
Key case-design characteristics include:
- larger movement diameter than SW200-1 / ETA 2824-2 class movements
- automatic rotor
- robust movement architecture
- movement holder-based positioning strategy
- crown and stem alignment requirements
- caseback and rotor clearance planning
- dial and hand stack control
- builder and modding relevance
The NH35 / NH36 should be treated as its own movement-led case system.
It is not a generic automatic movement. It has its own cavity, holder, clearance, and alignment requirements.
Supporting pages:
→ NH35 / NH36 Dimensions & Technical Data for Watch Case Design
→ NH35 / NH36 Case Design Guide
→ NH35 / NH36 Case Design Constraints
ETA 2892-A2
The ETA 2892-A2 is a slim Swiss automatic reference movement.
It is useful because it shows how thinner automatic architecture affects case thickness, axial stack control, rotor clearance, crown alignment, and caseback planning.
Key case-design characteristics include:
- 25.60 mm movement diameter
- approximately 3.60 mm movement height
- slim automatic architecture
- automatic rotor
- thin-case opportunity
- reduced axial margin
- caseback and rotor clearance sensitivity
- crown alignment sensitivity in thinner cases
The ETA 2892-A2 should be approached as a thin automatic case-design problem.
It is not simply a premium version of a standard automatic movement. Its reduced height changes the way axial space, caseback geometry, crown position, and case rigidity need to be managed.
Supporting pages:
→ ETA 2892-A2 Dimensions & Technical Data for Watch Case Design
→ ETA 2892-A2 Case Design Guide
→ ETA 2892-A2 Case Design Constraints
ETA 6497
The ETA 6497 is a large hand-wound mechanical movement derived from pocket-watch architecture.
It is useful because it represents a completely different movement-led case design problem from compact automatic calibres.
Key case-design characteristics include:
- large 36.60 mm movement diameter
- approximately 4.50 mm movement height
- hand-wound architecture
- no automatic rotor
- small seconds layout
- large case diameter implications
- manual-wind crown loading
- different caseback requirements
- movement retention under winding use
The ETA 6497 does not require rotor clearance, but it still requires controlled axial clearance, crown alignment, movement securing, caseback planning, sealing strategy, and manufacturable geometry.
Its design challenge is not compact rotor management. It is large-format movement support, dial layout, winding load, and case proportion.
Supporting pages:
→ ETA 6497 Dimensions & Technical Data for Watch Case Design
→ ETA 6497 Case Design Guide
→ ETA 6497 Case Design Constraints
ETA 2824-2
The ETA 2824-2 is a legacy standard Swiss automatic reference movement.
It is useful because it explains the movement class that many SW200-1-style case designs are related to.
Key case-design characteristics include:
- 25.60 mm movement diameter
- approximately 4.60 mm movement height
- automatic rotor
- central seconds
- date display
- standard automatic caseback planning
- crown and stem alignment
- movement securing
- date and dial-side stack control
The ETA 2824-2 should not be treated as automatically interchangeable with the SW200-1 in every detail.
It is a valuable reference for understanding standard 25.60 mm automatic case architecture, but a final case should still be checked against the exact movement specification being used.
Supporting pages:
→ ETA 2824-2 Dimensions & Technical Data for Watch Case Design
→ ETA 2824-2 Case Design Guide
→ ETA 2824-2 Case Design Constraints
Sellita SW300-1
The Sellita SW300-1 is a modern slim Swiss automatic reference movement.
It is useful because it connects modern Sellita movement planning with ETA 2892-A2-style thin automatic case architecture.
Key case-design characteristics include:
- 25.60 mm case-fitting diameter
- approximately 3.60 mm movement height
- slim automatic architecture
- automatic rotor
- thin-case planning requirements
- caseback and rotor clearance control
- crown and stem alignment
- dial-side stack control
- relationship to ETA 2892-A2-style case design
The SW300-1 should not be treated as an SW200-1 with height removed.
It requires its own slim automatic case architecture, especially where axial clearance, caseback depth, rotor space, and crown alignment are tightly constrained.
Supporting pages:
→ Sellita SW300-1 Dimensions & Technical Data for Watch Case Design
→ Sellita SW300-1 Case Design Guide
→ Sellita SW300-1 Case Design Constraints
Movement Categories Covered
The supported movement set gives HorologyCAD a broader engineering foundation.
It covers:
- standard automatic movements
- slim automatic movements
- Japanese automatic movements
- large hand-wound movements
- legacy Swiss automatic references
- modern Sellita automatic references
This allows the site to explain different case-design problems without repeating the same movement assumptions.
Each movement category changes the design priorities.
A standard automatic movement usually emphasises:
- rotor clearance
- caseback depth
- crown and stem alignment
- movement securing
- tolerance stack control
A slim automatic movement usually emphasises:
- axial stack control
- thin-case rigidity
- rotor clearance sensitivity
- reduced caseback depth
- crown alignment in limited vertical space
A large hand-wound movement usually emphasises:
- case diameter
- crown operation
- movement retention
- dial layout
- winding loads
- caseback planning without rotor clearance
A Japanese automatic movement may require different:
- holder planning
- stem alignment
- movement cavity sizing
- dial-side planning
- dimensional checks from Swiss movement families
Supporting pages:
→ Movement Height vs Case Thickness
→ Movement Securing Methods
→ Watch Case Tolerances
Movement Compatibility and Substitution
Movement compatibility should never be assumed from diameter alone.
Two movements may appear similar because they share a nominal diameter, but still differ in:
- movement height
- stem height
- dial feet position
- date position
- hand height
- rotor envelope
- caseback clearance
- movement holder geometry
- securing method
- tolerance behaviour
- service requirements
A case designed around one movement may not be suitable for another movement without modification.
Movement substitution should always be checked against the full movement-led case architecture, not just the movement diameter.
Supporting pages:
→ Movement to Case Fit
→ Crown and Stem Alignment in Watch Cases
→ Design Validation Checklist
How Supported Movements Fit Into the HorologyCAD System
Supported movements define the reference set used across the HorologyCAD design process.
Each movement connects to:
- movement-specific dimensions
- case design guides
- applied design constraints
- clearance planning
- crown and stem alignment
- dial-side stack control
- caseback and sealing strategy
- manufacturing tolerance planning
- validation before prototyping
The selected movement determines the downstream design pathway.
That is why HorologyCAD is movement-led.
The case does not define the movement. The movement defines the internal architecture of the case.
From Supported Movement to Case Architecture
Reviewing the supported movement set is only the first step.
Once a reference movement has been identified, the next step is translating that movement into case architecture.
This means checking:
- movement-to-case fit
- internal case geometry
- radial clearance
- axial clearance
- crown and stem alignment
- movement securing
- rotor clearance
- caseback clearance
- dial and hand clearance
- manufacturing tolerances
The goal is not simply to know which movement is being used.
The goal is to understand how that movement controls the geometry of the case around it.
Supporting pages:
→ Movement to Case Fit
→ Internal Case Geometry & Movement Cavity Sizing
→ Radial Clearance
→ Axial Clearance
→ Crown and Stem Alignment in Watch Cases
→ Movement Securing Methods
→ Rotor Clearance
What This Page Is
This page is a movement hub.
It identifies the reference movements used across HorologyCAD and explains why each one matters for watch case design.
It is not:
- a claim that all possible movements are supported
- a compatibility chart
- a list of interchangeable calibres
- a universal movement-fitting guide
- a public CAD product catalogue
It is a structured guide to the movements used as engineering references within the HorologyCAD system.
Final Statement
Supported movements define the reference movement set used within the HorologyCAD system.
Each movement requires:
- dedicated case architecture
- controlled radial clearance
- controlled axial clearance
- movement-specific crown and stem alignment
- defined movement securing
- caseback and sealing strategy
- manufacturing tolerance control
- assembly validation
Case design is not universal.
It is movement-specific by definition.
Next Step
Once a reference movement has been identified, the next step is translating that movement into case architecture.
Continue to:
Return to HorologyCAD
HorologyCAD is a movement-led watch case design system for building case architecture around real mechanical movements, manufacturable constraints, and functional assembly requirements.
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