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1. Material: Brass
2. Surface treatment: Passivation

1. Thread machining: precise pitch/tooth profile control.
2. Knurling: unevenness hard to control; unstable pressure.

1. Sample time: 7 working days
2. Production time: 12 working days

1. Material: Steel
2. Surface treatment: Oil painting

1. Spherical machining: precise roundness/curvature, tough turning path.
2. Dimensional accuracy: strict ball-thread coaxial tolerance.
3. Surface treatment: uniform black coating; roughness affects adhesion.

1. Sample time: 10 working days
2. Production time: 15 working days

1. Copper + Passivation
2. Steel + oil painting

1. Material adaptation: copper/steel require parameter adjustment.
2. Shape accuracy: multi-step irregular coaxial/vertical hard to control.
3. Detail machining: strict tolerance for small copper hole/steel boss.

1. Sample time: 8 working days
2. Production time: 12 working days

1. Material: Brass
2. Surface treatment: Copper Plated

1. Contour machining: step cylinder coaxial hard, precise tool path.
2. Dimensional accuracy: tiny diameter/height tolerance, wear causes error.
3. Surface quality: gold finish avoids tool marks, relies on process tools.

1. Sample time: 7 working days
2. Production time: 10 working days

1. Material: SUS 304
2. Surface treatment: None

1. Multi-feature machining: tough end-thread-hole connection.
2. Form tolerance: end thread coaxiality/flatness prone to clamp offset.
3. Stainless cutting: high toughness, uncontrolled force causes roughness.

1. Sample time: 10 working days
2. Production time: 15 working days

1. Material: SUS 304
2. Surface treatment: None

1. Irregular structure: uneven claw tool paths, strict tolerance, easy deformation.
2. Precision control: strict ring thickness/claw tolerance, clamp deformation.
3. Spatial machining: inner cavity tool interference, hard to avoid/ensure precision.

1. Sample time: 10 working days
2. Production time: 15 working days

1. Material: SUS 304
2. Surface treatment: None

1. Dimensional accuracy: strict multi-step tolerance, control tool wear.
2. Slot/hole machining: narrow end slots, high tool rigidity/feed.
3. Material cutting: hardness variation causes surface fluctuation.

1. Sample time: 8 working days
2. Production time: 12 working days

1. Copper + passivation
2. Stainless steel + none

1. Multi-material adaptation: big copper-steel parameter difference, frequent adjustment.
2. Coaxial accuracy: stepped eccentricity hard to control.
3. Detail machining: fine threads/narrow slots, strict tool feeding.

1. Sample time: 12 working days
2. Production time: 15 working days

1. Material: SUS 304
2. Surface treatment: None

1. Multi-material: big copper-steel parameter gap, frequent adjustment.
2. Coaxial accuracy: stepped eccentricity hard to control.
3. Detail machining: fine threads/slots, strict tool feeding.

1. Sample time: 8 working days
2. Production time: 12 working days

1. Material: Al 6061-T6
2. Surface treatment: Sand spraying and anodizing

1. Deep holes: long shaft holes prone to deviation, symmetry hard.
2. Coaxiality: multi-section coaxial clamping deformation.
3. Thin wall: aluminum thin wall vibration, strict parameter matching.

1. Sample time: 10 working days
2. Production time: 15 working days