Custom sleeve components with accurate milled features
SleeveMFG provides CNC milling services for industrial sleeves that require more than standard turning operations. We machine keyways, radial holes, flats, slots, grooves, and complex profiles while maintaining their relationship to the sleeve bore and outer diameter.
Integrated manufacturing
Milling that stays aligned with precision turning
Sleeve components frequently transition from a CNC lathe to a machining center. Our facility uses multi-axis CNC milling to add functional features to turned sleeves while maintaining control over the geometric relationship between the internal bore, external surfaces, and milled details.
Coordinating these operations in-house helps support demanding designs where feature position, concentricity, and fit are critical to the finished assembly.
Keyway sleeves
Locking shaft components for power transmission assemblies.
Indexed sleeves
Precisely positioned radial holes for set screws, lubrication ports, or locking pins.
Flatted sleeves
Parallel or angled wrench flats and orientation surfaces for assembly and tool engagement.
Notched and slotted sleeves
Features for snap-ring retention, alignment, and application-specific interfaces.
CNC milling capabilities
Built for prototypes, repeat production, and complex sleeve geometries
Our vertical and horizontal machining centers support precision requirements across low-volume prototypes and mass production. Milling parameters, work-holding, and finishing cycles are selected according to the sleeve geometry and material.
Machining performance
- Axis configuration: 3-axis and 4-axis indexing for circular hole patterns and radial features.
- Positional accuracy: Milled features are controlled to ±0.02 mm or better, depending on geometry.
- Feature complexity: Pockets, grooves, cross-holes, slots, and complex profiles on thin-wall and heavy-duty sleeves.
- Surface finish: Optimized milling cycles to minimize burrs, with secondary deburring included in the finishing cycle.
Precision features we machine
Keyways
Internal and external keyway broaching or milling.
Cross-drilling and tapping
Located holes for set screws, grease fittings, or sensors.
Flat machining
Parallel or angled flats for tool engagement or orientation.
Profile milling
Custom outer-diameter shapes for housing interfaces.
Snap-ring grooves
Milled or turned grooves with high depth control.
Material compatibility
Machining parameters matched to the material
We machine a wide range of industrial metals. Milling parameters are calibrated to the material grade to support dimensional stability, tool life, and the specified finish.
Stainless steel
304, 316, 17-4PH, 15-5PH
Carbon and alloy steel
1018, 1045, 4140, 42CrMo
Tool and bearing steel
D2, 52100, GCr15
Aluminum alloys
6061, 7075
Copper alloys
Brass, bronze, aluminum bronze
Nickel alloys
Inconel, Monel, Hastelloy
Process selection
The right process for every sleeve feature
Not every sleeve feature requires CNC milling. Our team reviews customer drawings and models to determine the most efficient manufacturing path. Simple radial holes may be drilled on a lathe with live tooling, while complex slots or pockets require a milling center.
By analyzing your drawing or 3D model, we select the optimal process flow to minimize part handling and setup time, preserve critical dimensions such as bore concentricity, and reduce overall per-piece costs for production runs.
Review the drawing or model
Choose the efficient process flow
Protect fit and production cost
Quality assurance
Inspection focused on feature position and fit
Every milled feature is verified against the customer’s drawing to ensure conformance. Our inspection workflow addresses positional accuracy, profiles, bore and thread fit, and surface roughness.
Coordinate measuring machines
Complex positional measurements relative to the sleeve axis.
Profile projectors
Verification of slots, keyways, and external profiles.
Bore and thread gauges
Confirmation that secondary milling operations preserve fit tolerances.
Surface roughness testers
Checking finish requirements on critical surfaces.
Request a quotation
Send your sleeve requirements for review
SleeveMFG manufactures custom sleeves from technical drawings, 3D models, or physical samples. We support single-piece prototypes through high-volume production.
Please provide your PDF, STEP, DWG, or DXF files along with the material specification, quantity, and any special tolerance or surface treatment requirements.
SleeveMFG
Share your engineering files and production requirements through our inquiry channel.