Will this drll a new hole or just enlarge an existing hole?

If you are referring to the Beadalon drill ... it won't drill a new hole and is very poor at enlarging already existing hole in pearls or hard stones. Buy the cheaper one with "diamond" tips ... which are coated with diamond dust and work fairly well.

What is the largest hole size you can ream with this? I need to ream 3mm diameter holes in a large quantity of stone beads.

HI,,,3mm is pretty big, and I dont have any experience using the reamer for anything other than enlarging existing holes in genuine, not glass, pearls. Why not investigate getting a cordless drill from the hardware store that is designed to take small drill bits. I have one that I use for mother of pearl pieces that come with no holes. Hope this helps. Barb

How can I get tne cup bur bit?

The “Beadalon Wire Rounder Burr Attachment” is sold separately.

Is the tip supposed to be seated so loosely as in the one that I got? Or mine is damaged?

No. It's supposed to be tight. If you zoom in on the picture of the product, the lower right hand side, the tip is metal and there is black rubber on the part that gets inserted into the mechanical part of the reamer. Hope that helps. I love mine!

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Beadalon Wire Rounder Burr Attachment - Fits 16 and 18 Gauge Wire

Product ID: 5824812

Details

Material
Plastic
Color
Blue
Brand
Beadalon
Item Weight
0.06 Kilograms
UPC
798804626815

🎨Multi-material versatility

💎Dual diamond reamer tips

⚙️Battery-powered precision

21220CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Elevate your bead game with precision power!

COMPACT PORTABLE - Handheld, lightweight tool perfect for on-the-go jewelry artists and crafters.
MULTI MATERIAL MASTERY - Works seamlessly on pearls, gemstones, glass, ceramic, and more for flawless results.
DUAL DIAMOND TIPS INCLUDED - Two durable, tapered diamond reamer tips for versatile bead shaping and finishing.
EFFORTLESS PRECISION REAMING - Battery-operated design ensures smooth, controlled bead hole enlargement every time.
PROFESSIONAL FINISH EVERY TIME - Refines bead holes for easier stringing and polished, gallery-worthy jewelry projects.

The Beadalon Battery Operated Bead Reamer is a compact, battery-powered jewelry finishing tool featuring two diamond-coated reamer tips. Designed for precision enlargement and smoothing of bead holes across multiple materials including pearls, gemstones, and glass, it offers professional-grade results in a portable, easy-to-use format favored by jewelry makers and crafters.

Specifications

ASIN	B00VTMIA5U
Best Sellers Rank	#98,995 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #566 in Jewelry Making Wire
Brand Name	Beadalon
Customer Reviews	4.5 4.5 out of 5 stars (431)
Finish Types	Polished
Global Trade Identification Number	00035926127685
Item Dimensions	1.1 x 0.1 x 0.1 inches
Item Highlight	Smooth Wire Finishing Tool for Rounded Ends, Jewelry Findings and Ear Wires, Works with Battery Reamer for Jewelry Projects
Item Weight	9.07 g
Manufacturer	Beadalon
Material Type	silver
Model	208F-004
Part Number	208F-004
UPC	035926127685
Unit Count	1 Count

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