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POWERTEC 70145 4-Inch to 3-Inch Reducer

Q: What is the ID of the 3inch side?

I bought this for my grizzly shaper with a 3" dust port. the 3" end is the same OD as the shaper. What I had to buy was a 3" x 6" piece of dust collector hose. I think Rockler sells it. Good luck.

Q: I need a 2.75 Outer diameter to 4”.. will this fitting work?

Read the specs carefully. It is designed to connect 4" to 3" dia hose.

Product ID: 18731898

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Details

Size
1 Count (Pack
Material
ABS plastic
Brand
POWERTEC
Color
Black
Item dimensions L x W x H
4.14 x 4.14 x
Connector Type
Reducer

⚡Boosts air velocity at dust source

📏4-inch to 3-inch precision fit

🛡️Heavy-duty ABS plastic durability

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Description

🔗 Connect with Confidence — Upgrade Your Dust Collection Game!

BUILT TO LAST - Crafted from premium ABS plastic to resist abrasion, rust, and corrosion in tough workshop environments.
OPTIMIZED AIRFLOW - Tapered port design increases air velocity exactly where your dust collection needs it most.
COMPACT LIGHTWEIGHT - Just 3.21 ounces and under 4.2 inches—easy to install without adding bulk or weight.
UNIVERSAL COMPATIBILITY - Fits standard 4-inch OD hoses and most 3-inch dust collection lines for versatile workshop setups.
SEAMLESS SIZE TRANSITION - Effortlessly connect 4-inch hoses to 3-inch ducts without leaks or fuss.

The POWERTEC 70145 reducer is a precision-engineered dust collection adapter that transitions 4-inch hoses to 3-inch ducts. Made from rugged ABS plastic, it ensures long-lasting durability against abrasive workshop dust and clamp pressure. Its tapered port boosts airflow velocity near your tools, optimizing dust extraction efficiency. Lightweight and compact, it fits standard hose sizes for seamless integration into any dust collection system.

Specifications

Size	1 Count (Pack of 1)
Material	ABS plastic
Brand	POWERTEC
Color	Black
Item dimensions L x W x H	4.14 x 4.14 x 3.44 inches
Connector Type	Reducer
Thread Size	3 inches
Exterior Finish	ABS
Item Weight	91 Grams
Number of Pieces	1
Global Trade Identification Number	00736815005960
Manufacturer	Southern Technology LLC
UPC	736815005960
Part Number	70145
Item Weight	3.21 ounces
Product Dimensions	4.14 x 4.14 x 3.44 inches
Item model number	70145
Is Discontinued By Manufacturer	No
Style	4" to 3" Reducer (1pk)
Item Package Quantity	1
Included Components	4-Inch to 3-Inch Reducer
Batteries Included?	No
Batteries Required?	No

Have a Question? See What Others Asked

What is the ID of the 3inch side?

I need a 2.75 Outer diameter to 4”.. will this fitting work?

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