What size mounting spindle does this need?

Not sure of the exact size, but it will only fit the Proxxon mini-lathe.

What is the mechanism for tightening on the workpiece. Is it a t type driver or two pins that must be manipulated?

Not a good mechanism. You need to tighten each hold individually, so it is not precise. I have since obtained a new lathe and a better Chuck, that will self center.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Proxxon 27024 Four jaw Chuck for Lathe DB 250, Black

Product ID: 255757943

Details

Brand
PROXXON
Compatible devices
Lathe
Item diameter
67 Millimeters
Item weight
23 g
Material
Metal Alloy

📏Clamps 1.5-35mm inside, 14-67mm outside

🔩M16x1 thread fits DB 250 spindle

⚙️4 jaws, individually adjustable

R1856

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Master every turn with precision and style!

DUAL CLAMPING RANGE - Versatile inside (1.5-35mm) and outside (14-67mm) clamping for diverse projects.
MANUAL LOCKING CONTROL - Full control over clamping pressure for precision turning.
LIGHTWEIGHT YET DURABLE - Metal alloy construction balances strength with easy handling.
SEAMLESS DB 250 INTEGRATION - Direct screw-in M16x1 thread for quick, secure mounting.
PRECISION GRIP FOR ASYMMETRICAL PIECES - Individually adjustable jaws ensure perfect hold on irregular shapes.

The Proxxon 27024 Four Jaw Chuck is a precision tool accessory designed for the DB 250 lathe, featuring individually adjustable jaws that clamp asymmetrical workpieces with a versatile range from 1.5 to 67mm. Its M16x1 threaded mount ensures seamless attachment, while the metal alloy build offers a lightweight yet durable solution for professional and hobbyist machinists alike.

Specifications

ASIN	B0016KJWY8
Best Sellers Rank	#127,087 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #14 in Lathe Chucks
Brand Name	PROXXON
Capacity	6.7 centimeters
Compatible Devices	Lathe
Customer Reviews	3.4 3.4 out of 5 stars (196)
Global Trade Identification Number	04006274270244
Handle Type	manual
Included Components	Proxxon Four-jaw chuck, individually adjustable for DB 250
Item Diameter	67 Millimeters
Item Type Name	Four jaw chuck for lathe DB 250
Item Weight	23 g
Lock Type	Manual
Manufacturer	Proxxon
Manufacturer Part Number	27024
Material Type	Metal Alloy
Model Number	27024
Number of Items	1
Thread Size	M16x1
UPC	767674858992 798256194061

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