Connections Confirmed by Bosch
The RA1175 page explicitly names the 1618 and 1618EVS. It specifies a connection to 35 mm hoses and to 1-1/4 and 1-1/2 in. hoses with the included VAC002 adapter. These connections apply after the hood is installed; the bare router should not be presented as having that port.
| Your hose | Bosch configuration | Status |
|---|---|---|
| 35 mm | RA1175 | Documented connection |
| 1-1/4" | RA1175 + VAC002 | VAC002 included with RA1175 |
| 1-1/2" | RA1175 + VAC002 | VAC002 included with RA1175 |
| Other size | Separately measured fitting | Not verified |
RA1175 or RA1172AT Kit?
The RA1175 is Bosch’s edge-forming hood. The RA1172AT kit is also listed for the 1618 and 1618EVS; it includes an edge-forming hood, a hood for surface work with the fixed base, and a hose adapter. Choose by operation and base configuration, not by hose diameter alone.
Verify the Actual Fit
Confirm the hood model, installed base and cuff geometry. For a third-party hose, measure ID, OD, taper and engagement depth. Do not force a fitting or let the hose restrict router movement.
Frequently Asked Questions
Does the RA1175 fit the 1618 and 1618EVS?
Yes. Bosch explicitly lists both models on the RA1175 page.
Which adapter is used for a 1-1/4 in. hose?
Bosch specifies the VAC002, included with the RA1175, for 1-1/4 and 1-1/2 in. hoses.
Does the RA1172AT always replace the RA1175?
No. The kit covers multiple fixed-base operations; the right choice depends on the cut and required hood.
Technical Sources
Unplug the router before installing the hood. Make sure the hood and hose cannot contact the bit, collet, workpiece or adjustment mechanism.