What a mechanical watch case surrounds and locates
Review this component together with its mating parts and delivered condition. The interfaces below define the drawing information needed to assess forming, finishing and inspection.
This page focuses on case interfaces rather than the broader watch-hardware group.
Movement envelope, case-back, crown and strap interfaces
Provide the movement envelope, case-back connection, crown opening and strap attachment geometry.
Separate sealing or seating faces from cosmetic contours.
Why include the movement envelope before quoting the case?
The outer form does not reveal the space or locating surfaces needed by the movement.
Including that envelope allows the body, openings and closure to be evaluated as one mechanical arrangement, reducing ambiguity about which internal surfaces control fit.
Forming the case body with machining of seats and threads
Review forming of the exterior body with machining of precision seats, threads and openings.
The selected sequence must account for the final surface finish.
The proposed route is confirmed for your drawing, material and quantity. An image does not establish a fixed tolerance or a complete process specification.
Compare manufacturing capabilities →Mechanical watch case material and cosmetic-finish requirements
Define base material, final condition and cosmetic finish separately.
Identify visible faces, permitted edge rounding and the dimensions that must be met after finishing.
Any magnetic, electrical or acoustic requirement needs its own specification.
Review material-selection information →Movement clearance, closure fit and opening-position checks
Check movement clearance, closure fit and opening position in the finished case.
Any sealing or durability requirement needs the agreed assembly test.
Specify the drawing revision and the condition in which each dimension is inspected. Record the agreed dimensional and functional checks before sample approval.
Quality documentation →Prepare a Product-Specific RFQ
- Component definition. Send the 2D drawing and 3D model, where available, with the drawing revision and the requested part or assembly scope.
- Mating information. Include the assembly references needed to define the interfaces discussed above.
- Delivered condition. State material, finishing and inspection requirements, identifying any items that need a manufacturing recommendation.
- Supply plan. Include sample needs, expected order and annual quantities, packaging requirements and target timing.
Product Questions
Can the case be quoted from exterior dimensions alone?
An exterior model can start discussion, but movement clearance, openings and closure details are needed for a manufacturing quotation.
Why include the movement envelope before quoting the case?
The outer form does not reveal the space or locating surfaces needed by the movement. Including that envelope allows the body, openings and closure to be evaluated as one mechanical arrangement, reducing ambiguity about which internal surfaces control fit.
How are appearance and functional fit checked?
Check movement clearance, closure fit and opening position in the finished case. Any sealing or durability requirement needs the agreed assembly test.
Technical Context
The product-specific notes above identify drawing-review questions. General process and material references are collected separately; they do not verify a material grade, production qualification or performance claim for the pictured part.
Manufacturing and material references →