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CNC Machined Aluminum Chain Sprocket

Custom 6061 aluminum chain sprocket produced by CNC milling with controlled tooth geometry, runout and flatness, followed by sandblasting and natural-color hard anodizing.

Category:

CNC Machining

key word:

CNC Machining

Aluminum Machining

Toothed Ring

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Product Description

Product Information

Manufacturing Process	CNC milling
Part Type	Transmission chain sprocket
Material	6061 aluminum alloy
Surface Treatment	Sandblasting and natural-color hard anodizing
Structural Features	Large-diameter tooth ring, central bore, mounting-hole pattern, thin sections and multiple weight-reduction cut-outs
Application Field	Industrial chain-drive transmission systems
Production Type	Custom production to drawing

Product Overview

This case features a custom transmission chain sprocket CNC milled from 6061 aluminum alloy. Its large tooth ring integrates a central bore, mounting-hole pattern and multiple weight-reduction cut-outs, followed by sandblasting and natural-color hard anodizing for a clean, consistent finished surface.

Structure and Machining Features

The tooth profile must match the specified chain geometry, while the center bore and mounting holes establish the functional relationship between the sprocket and its mating assembly. The large diameter, relatively thin sections and repeated cut-outs reduce weight but also lower machining rigidity. Machined tooth flanks and the fine sandblasted face remain visibly distinct after finishing.

Machining Challenges and Control Strategy

The main risks are tooth-pitch variation, tooth-position runout, vibration and flatness distortion. A stable center datum and well-supported workholding help maintain the relationship between the tooth ring, center bore and mounting pattern. Balanced material removal, controlled cutting loads and staged roughing and finishing reduce stress on the thin structure. Tooth-profile finishing from a consistent datum allows pitch accuracy and rotational runout to be controlled together, while critical interfaces must account for the dimensional effect of hard anodizing.

Quality Control Focus

Key control points include tooth-profile and pitch consistency, runout relative to the center bore, mounting-hole position, overall flatness, edge condition and anodized appearance. These features should be evaluated against the approved drawing and acceptance requirements without applying unnecessary tolerances to non-critical surfaces.

Project Value

The combined control of tooth geometry, rotational accuracy, structural flatness and surface finishing supports stable chain engagement and more consistent fit across repeat production batches. The result is a lightweight sprocket that is easier to assemble, verify and reorder with lower dimensional and finish-related risk.

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