Manufacturing Standards
Default workmanship standards applied when an accepted order does not specify otherwise.
1. Scope and Interpretation
These Manufacturing Standards state the default workmanship applied to RivCut orders when the accepted drawing, model, quote, or order confirmation does not specify otherwise. Requirements shown in the accepted order always override these defaults. Where a 2D drawing and a 3D model are both provided, the drawing controls unless the accepted order designates otherwise.
2. Default Dimensional Tolerances
Unless specified: machined linear dimensions are held to ±0.005 in (±0.13 mm). Dimensions taken from an untoleranced 3D model use this default. Measurement reference temperature is 68°F / 20°C.
3. Default Angular Tolerances
Unless specified: ±0.5° on machined angular features.
4. Unspecified External Radii and Chamfers
Sharp external corners in the model may carry a break edge or radius up to 0.015 in unless the drawing marks them sharp.
5. Internal Corner Radii
Internal corners produced by milling carry a radius no smaller than the cutting tool used; expect a minimum internal radius of approximately one-half the smallest practical end-mill diameter for the feature depth. Truly sharp internal corners require EDM or broaching and must be specified and quoted.
6. Thread Classes
Unless specified: Unified threads are class 2A (external) / 2B (internal); metric threads are 6g / 6H. Threads are gauged with standard GO/NO-GO gauges.
7. Thread Depth
Unless specified: tapped depth is at least the callout depth; usable full thread meets the callout, with up to two incomplete lead threads permissible in blind holes.
8. Hole Depth
Drilled blind-hole depth is measured to the full diameter; a standard 118°–135° drill point beyond that depth is permissible unless a flat bottom is specified.
9. Surface Finish
Unless specified: as-machined surfaces are 125 µin Ra or better. Finer finishes must be specified per surface and may affect price.
10. Deburring and Edge Break
Parts are deburred; accessible sharp edges receive a break of approximately 0.005–0.015 in unless the drawing specifies edge condition.
11. Tool Marks and Cosmetics
Visible machining witness marks consistent with the specified surface finish are normal and acceptable. Surfaces requiring cosmetic control must be identified in the order; cosmetic acceptance criteria apply only when specified.
12. Anodizing and Finishing Variation
Anodize color, gloss, and shade vary between lots, alloys, and part geometries; color matching between parts or lots is not guaranteed unless expressly agreed. Rack or contact points are placed in the least conspicuous practical location.
13. Plating Buildup
Unless specified, dimensions apply before plating; plating thickness per the specified plating standard may add material to surfaces and threads.
14. Heat-Treatment Distortion
Heat treatment can distort parts. Unless post-heat-treat machining or straightening is specified and quoted, dimensions apply before heat treatment for processes performed after machining.
15. Material Condition and Substitution
Material is supplied in the condition/temper stated in the order. RivCut does not substitute alloys or tempers without written approval.
16. Grain Direction
Grain direction is controlled only when specified on the drawing.
17. Part Marking and Serialization
Parts are unmarked unless marking or serialization is specified and quoted.
18. Packaging
Standard protective commercial packaging is used. Special packaging (individual bagging, VCI, foam fixtures, labeling) must be specified and quoted.
19. Quantity
Exact quantity is shipped for standard orders (no over/under) unless the quote states a production over-run/under-run allowance.
20. Inspection Sampling
Standard inspection uses a reasonable sampling plan on critical features with calibrated instruments. Full or documented inspection (reports, FAIR, CMM) applies only when listed and priced in the order (Terms of Sale §13).
21. Model vs. Drawing
Untoleranced model dimensions use the defaults above. Where the drawing and model conflict, the drawing controls unless the accepted order designates the model or a model-based definition as controlling; Customer must disclose known conflicts (Terms of Sale §9).