Bosch Power Tool Dust Collection: Ports, Hoses, and Adapters

Bosch uses a 35mm inside diameter port on most of their portable power tools. This is 3mm larger than the 32mm standard used by Milwaukee and DeWalt, and 1mm smaller than Makita's 36mm.

The 35mm port is one of the most common European metric tool port sizes. You see it on Bosch, Metabo, Hitachi (Metabo HPT), and many corded European tools. If you have any of these brands, the same adapters often work across all of them.

Bosch 18V PROFACTOR and Core18V Tools

Bosch to Standard Shop Vac

A standard 1-1/4 inch small shop vac hose has an OD of about 32mm. This is too small to seat in the 35mm Bosch port. A 35mm-to-32mm adapter steps the port down to match the hose end. The adapter fits snugly in the Bosch port on one end and grips the hose on the other.

If your shop vac uses a 1-7/8 inch hose (48mm OD), you need a 35mm-to-48mm adapter. This is a step-up that allows the larger hose to connect to the smaller tool port without leaking air.

Bosch to Festool CT Extractor

The Festool CT hose is 27mm. The Bosch port is 35mm. The adapter reduces from 35mm to 27mm. This is a common cross-brand setup because Festool extractors are popular and many shops use Bosch tools.

Performance with a Festool CT MIDI connected to a Bosch tool is very good. The CT MIDI provides enough suction through the 27mm hose for sanding, routing, and circular saw work.

Bosch Dust Extractors

Bosch also makes their own dust extractors in the VAC series. These use a 35mm hose that matches the tool ports directly. If you use Bosch extractors with Bosch tools, no adapters are needed.

The Bosch VAC090A and CORE18V VAC14 are the most popular Bosch extractors in the US. Both use 35mm hose ends that connect directly to any Bosch tool with a 35mm port.

Connecting Bosch to a Central Dust Collector

If you have a fixed dust collection system with 4-inch duct, you need to step down from 4 inches (100mm) to 35mm. This is a large reduction. The best approach is to run a 4-to-2.5-inch reducer at the duct drop, then a flexible 2.5-inch shop vac hose to the tool with a 63mm-to-35mm adapter at the tool end.

Metabo and Metabo HPT (Hitachi)

Metabo and Metabo HPT both use the 35mm port standard on most models. This means the same adapters that work for Bosch tools work for Metabo tools. If you have a mixed shop with Bosch and Metabo tools, one set of adapters covers both brands.

Quick Reference

Use our configurator to find adapters for your specific Bosch model and vacuum setup.