Manufacture custom parts when you need them—without unnecessary inventory, fixed high-volume commitments, or fragmented supplier management.
ISO 9001:2015 | ISO 13485:2016 | IATF 16949:2016
On-demand manufacturing produces custom parts when they are needed instead of building large inventories in advance. It is commonly used for MRO, replacement parts, urgent replenishment, short-run orders, engineering changes, and irregular repeat demand.
Unlike prototyping, on-demand manufacturing starts from an existing part requirement. Mastars reviews CAD files, drawings, materials, finishes, and specifications to determine the right process, quantity, inspection requirements, and delivery plan.
On-demand manufacturing is suitable when part requirements are known but demand timing or quantity changes over time. Common applications include replacement parts, MRO, service inventory, engineering changes, legacy equipment support, and irregular repeat orders.
By manufacturing when needed instead of holding excess inventory, teams can reduce stock risk, obsolescence, and unnecessary upfront investment.
| Manufacturing Process | Best On-Demand Fit | Typical Lead Time | Suitable Materials | Best For | Tooling |
| CNC Machining | Urgent and repeat custom parts | Days to weeks | Metals & engineering plastics | Replacement parts, brackets, housings, machine components | No dedicated tooling |
| Injection Molding | Repeat replenishment with existing tooling | Weeks after tooling | Production-grade thermoplastics & elastomers | Recurring molded parts | Required |
| Sheet Metal Fabrication | Short-run and repeat structural parts | Days to weeks | Aluminum, stainless steel, carbon steel | Brackets, panels, covers, enclosures | Minimal tooling |
| 3D Printing | Medium to High | Days | Engineering polymers, resins & metals | Fixtures, adapters, complex parts | No tooling |
| Vacuum Casting | Small plastic batches | Days to weeks | Polyurethane materials | Service parts and short-run replacements | Silicone tooling |
| Metal Casting | Recurring metal parts | Project dependent | Aluminum and castable alloys | Complex housings and near-net-shape parts | Process dependent |
On-demand manufacturing means producing custom parts when an actual need or order occurs instead of manufacturing large quantities in advance and holding inventory. It is commonly used for MRO, replacement parts, urgent replenishment, short-run orders, engineering changes, and irregular repeat demand, helping reduce unnecessary stock and obsolescence risk.
Typical parts include replacement components, brackets, mounts, housings, covers, panels, fixtures, jigs, adapters, service parts, and production spares. The best process depends on geometry, material, tolerance, quantity, tooling availability, finish, and expected service conditions.
Sometimes, but the available information must be reviewed first. Existing drawings, dimensions, approved specifications, or samples may help us assess whether a replacement part can be manufactured.
A physical sample alone may not contain enough information to reproduce every functional requirement. Critical dimensions, material, tolerance, finish, and service conditions should be understood before the manufacturing route is confirmed.
No. Mastars supports flexible manufacturing without a fixed MOQ. The practical quantity depends on the process, part requirements, and tooling economics. CNC machining or 3D printing may suit very small quantities, while molding or casting may become more practical when repeat demand justifies tooling.
Repeat orders are easier when the approved manufacturing information is clearly controlled. Drawings, revision levels, materials, finishes, tolerances, and inspection requirements can be referenced to reduce specification errors and unnecessary requalification when the same part is reordered.
If the design changes, the updated revision should be reviewed before the next manufacturing release.
Inspection depends on the part and project requirements. Mastars supports FAI, in-process inspection, dimensional verification, final inspection, CMM, optical measuring equipment, height gauges, and other inspection tools. The inspection scope should focus on critical dimensions, fit, finish, and customer-defined requirements.
Yes, depending on project requirements. Available documentation can include FAI, dimensional inspection, CMM inspection, and production quality records. If you require material certificates, CoC, PPAP, or other specific documents, include those requirements during quoting so availability and scope can be confirmed before manufacturing.
It depends on the process and part requirements. CNC machining, sheet metal fabrication, or 3D printing may start faster when no dedicated tooling is required, while molding, casting, special materials, complex finishes, or detailed inspection can add lead time. Once we review your files, quantity, and requirements, we can confirm the manufacturing route and estimated delivery timeline.
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