2.5" Threaded Vacuum Hose Adapters (Straight Slip & Tapered Ports)
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Vacuum hose adapters designed to thread securely into standard 2.5” flexible dust collection and shop vac hoses
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A set of robust threaded hose adapters tailored specifically for standard 2.5” flexible dust extraction hoses. The integrated coarse thread screws directly into the inner spiral of the hose for a tight, mechanical lock that won't pull loose under vacuum pressure or shop movement.
Whether you're hooking up a table saw, router table, or shop vac accessory, these adapters eliminate loose fittings and air leaks. Available in both standard slip and smoothly tapered outer profiles to fit various shop tools and accessories.
Specifications & Dimensions
Threaded Base (Hose Side): Sized for standard 2.5” flex hose | 1.00” height with 0.35” deep end cup.
Straight Slip Adapter Port: 2.49" OD / 2.25" ID | 2.175” port height | 0.24” wall thickness
Tapered Adapter Port: Features a smooth outer taper from 2.49” (0.625" straight) down to 2.285” across the height of the outer port for a wedge friction fit.
Total height: 2.272”
Upon request, 57mm outer diameter:
Threaded Base (Hose Side): Sized for standard 2.5” flex hose | 1.25” height with 0.35” deep end cup.
Straight Slip Adapter Port: 57mm (2.24409")OD / 50.6476mm (1.994") ID | 2” port height | 0.24” wall thickness
Print Settings & Recommendations
Because these are functional workshop fittings subject to vibration, hose strain, and suction, follow these recommendations for long-term durability:
Material: PETG, ABS, or ASA are strongly recommended for impact resistance, flex tolerance, and temperature stability in hot shop environments. (PLA works fine for light-duty, but may deform under constant spring-tension from flex hoses).
Walls / Perimeters: 4 or more walls (Tip: Adding extra perimeter walls dramatically increases torsional strength on cylindrical parts far better than high infill alone).
Infill: 20% or higher (Gyroid or Grid pattern recommended).
Layer Height: 0.12mm to 0.20mm (lower layer heights help smooth out the thread geometry for easier threading).
Supports: Turn off auto-generation in your slicer. Import the support STL alongside the main body, align/center both models, and assign the support geometry as a custom support/modifier mesh.
Custom Sizing Need a different port diameter or specific taper angle for your setup? Drop a comment below with your exact measurements, and I’ll be glad to generate and upload a custom variant!
Don't feel like dealing with supports, look here for version 2, a two-piece design to eliminate those pesky supports.
Explore More Workshop Upgrades
Browse my full catalog of custom adapters, dust collection fittings, and workshop jigs here:
Workshop Tools and Jigs: https://www.printables.com/@DPs_Designs_4882792/collections/3599922
Workshop Dust Collection Fittings: https://www.printables.com/@DPs_Designs_4882792/collections/3599928