Connect a Bosch GCM12SD miter saw port to a Fein Turbo 35 mm hose
How to join a Bosch GCM12SD miter saw port to a Fein Turbo 35 mm hose, and what stops it leaking dust.
Not a direct fit. Joining the Bosch GCM12SD miter saw port to a Fein Turbo 35 mm hose needs a 1-1/4 in to 35 mm step reducer.
Rings drawn to scale from the measured diameters in the table below.
The two ends
| End A | Bosch GCM12SD miter saw port (1-1/4 in ID) |
|---|---|
| End B | Fein Turbo 35 mm hose (1-3/8 in ID) |
| Fit type | hose cuff into female socket |
| Reducer needed | 1-1/4 in to 35 mm step reducer |
Shop notes
Measured across the joint between the Bosch GCM12SD miter saw port and the Fein Turbo 35 mm hose, the hose tip (35 mm) is 3 mm larger than the port socket (32 mm), so it will not seat. A 1-1/4 in to 35 mm step reducer closes that 3 mm step so the two hold together instead of leaking at the gap.
A 3 mm mismatch feels close enough to force, and it will hold for a minute before it works loose under airflow. Fit the step ring rather than trusting friction on a gap this size.
The reducer to buy
Search Amazon for 1-1/4 in to 35 mm step reduceraffiliate searchRelated connections
- Bosch GCM12SD miter saw portrear approx 1-1/4 in ID (32 mm)
- Fein Turbo 35 mm hose35 mm diameter
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