---
title: "Low-Volume Manufacturing | Bridge & Short-Run Production | OpenSpindle"
description: "Get low-volume manufacturing quotes from independent shops for runs of tens to a few thousand parts. Compare urethane casting, bridge tooling, CNC, and SLS without committing to a big tooling bill upfront."
canonical: https://openspindle.com/manufacturing/low-volume-manufacturing
---

# Low-volume manufacturing from independent shops

Tens to a few thousand parts without a big tooling bill. Low-volume production is the bridge between a prototype and full production, and the right process depends on your material, geometry, and volume. Upload a part and hear back from independent shops with pricing and lead time.

**10-1,000** typical run size | **Low/no tooling** options | **~48h** to a quote

## Which process for low volume

There is no single "low volume" process. Each of these fits a different combination of material, finish, and run size, and it is common to mix methods across one bill of materials.

| Process | Lead time | Volume | Why it fits |
| --- | --- | --- | --- |
| [Urethane Casting](https://openspindle.com/capabilities/urethane-casting.md) | 1-3 weeks | 10-200 | Molded feel from a cheap silicone tool cast off a master pattern, no steel or aluminum mold needed. |
| [Prototype/Bridge Molding](https://openspindle.com/capabilities/prototype-molding.md) | 3-5 weeks | 100-10,000 | An aluminum tool bridges the gap to production while a hardened steel mold is being cut. |
| [CNC Machining](https://openspindle.com/capabilities/cnc-machining.md) | 1-2 weeks | 1-1,000 | No tooling at all, holds tight tolerances, and runs in nearly any metal or plastic. |
| [SLS](https://openspindle.com/capabilities/sls-3d-printing.md) | 3-7 days | 1-500 | Durable nylon parts with no tooling and no supports, good for complex geometry and nested batches. |
| [Sheet Metal](https://openspindle.com/capabilities/sheet-metal-fabrication.md) | 1-2 weeks | 1-1,000 | Brackets, panels, and enclosures cut and formed with no hard tooling required at this volume. |

## Which route for 10 to 500 parts

At this run size, cost and lead time depend mostly on whether the part needs tooling at all.

| Approach | Best for | Lead time | Cost |
| --- | --- | --- | --- |
| [Urethane casting](https://openspindle.com/capabilities/urethane-casting.md) | Molded-feel parts at low volume | 1-3 weeks | $$ |
| [Bridge tooling](https://openspindle.com/capabilities/prototype-molding.md) | Ramping to real injection molding | 3-5 weeks | $$$ |
| [CNC](https://openspindle.com/capabilities/cnc-machining.md) | Precision parts in any material | 1-2 weeks | $$$ |
| [SLS](https://openspindle.com/capabilities/sls-3d-printing.md) | No tooling, complex geometry | 3-7 days | $$ |

## Choosing a low-volume route

- **Tooling pays off only past a break-even volume:** A mold or hard tool has a fixed cost that gets divided across every part it makes. Below a certain volume, a no-tooling process like CNC or SLS almost always costs less per part, even though its per-part price looks higher.
- **Bridge tooling buys time while a steel tool is cut:** An aluminum bridge tool lets you sell real, injection-molded parts for months while a hardened production mold is machined, instead of waiting for the final tool before you can ship anything.
- **Mixing methods across a BOM is normal and fine:** A single assembly might combine a cast urethane housing, a CNC machined bracket, and an SLS printed bracket. Sourcing each part by what it actually needs beats forcing one process on the whole BOM.
- **Order what you need, when you need it:** You do not have to commit to one large run. Order in smaller batches as demand firms up, or set a release schedule, so you are not tying up cash in inventory that sits on a shelf.

## Low-volume shops on OpenSpindle

Independent shops that regularly run short batches, from cast urethane parts and bridge-tooled moldings to CNC and 3D printed runs, without a high minimum order.

[Browse all CNC machining shops](https://openspindle.com/manufacturers?capability=CNC%20machining)

## Frequently Asked Questions

### What counts as low volume?

Low volume generally means roughly tens to a few thousand parts, above a one-off prototype but below the volume where a hardened production tool pays for itself. The exact line depends on the part: a small simple part might make sense to mold at a few hundred pieces, while a large or complex part might stay on CNC or casting well into the thousands.

### What is the cheapest way to make 100 parts?

For 100 parts, a no-tooling process such as CNC machining or SLS 3D printing is usually cheapest overall, since there is no tool to pay off. If the part needs to look and feel like an injection-molded plastic part, urethane casting from a low-cost silicone tool is often the next cheapest option. The right answer still depends on material, geometry, and finish, so it helps to get quotes across a couple of processes.

### What is bridge production?

Bridge production uses a faster, cheaper tool, typically an aluminum injection mold, to run real parts while a hardened steel production tool is being machined. It lets you sell or field-test actual molded parts during the weeks or months a final tool takes to build, instead of waiting on the production tool before shipping anything.

### When is it worth investing in tooling?

Tooling is worth it once the volume is high enough that the per-part savings from a molded or stamped process outweigh the fixed tool cost. Below that break-even point, no-tooling processes like CNC or 3D printing usually cost less overall. Ask shops to quote your part both ways, at your current volume and at your expected volume a year out, to see where that crossover lands.

### Can I reorder the same parts later?

Yes. Parts you have made are saved to your OpenSpindle parts library, so a reorder is a couple of clicks rather than a fresh request, and it can be routed back to the same shop for consistency. For molded or cast parts, the tool stays with the shop that made it, so repeat runs skip the tooling cost and pick up where the last run left off.

## Related

- [Rapid Prototyping](https://openspindle.com/manufacturing/rapid-prototyping.md)
- [High-Volume Manufacturing](https://openspindle.com/manufacturing/high-volume-manufacturing.md)

## Get low-volume quotes

Upload a part once and compare low-volume pricing across urethane casting, bridge tooling, CNC, and 3D printing from independent shops.