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Stainless Steel Grooved Ring Mandrel – US 0–16 & UK A–6 Ring Sizing Tool

Stainless Steel Grooved Ring Mandrel – US 0–16 & UK A–6 Ring Sizing Tool

$28.99 USD
$28.99 USD
Sale Sold out

Made from high-grade stainless steel, this 14-inch ring mandrel features a smooth, polished surface and clear laser-marked US 0–16 and UK A–6 sizes. CNC machined for consistent measurements, it includes a curved handle for a comfortable grip and a sturdy plastic carry case for easy storage. 

 

Raw Material

Every tool is crafted using quality raw materials to ensure its durability and longevity.

Value Added

Our tools are designed with careful consideration to ensure they deliver exceptional value to you.

Quality Checked

Each tool passes through a meticulous quality inspection procedure.

Well packed

All our tools are carefully packed to ensure they arrive in perfect condition.

Shipping

Free shipping and returns available on all orders!

We ship all US domestic orders within 1-3 business days!

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Trusted by 20,000+ Jewelers
Across the United State
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Ships in 1–3 Days
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What Is a Grooved Ring Mandrel US 0-16 & UK A-6?

The stainless steel grooved ring mandrel from Splenor Tools is a professional jewelry tool for jewelers, metalsmiths, and silversmiths who form, shape, and resize rings. It covers US ring sizes 0–16 and UK sizes A–6, making it useful for jewelry workshops that work with different ring-sizing systems.

The center groove provides clearance for raised settings and other ring details while working on suitable ring designs. The 14-inch mandrel features dark laser-marked size measurements, CNC machining, a curved handle, and a plastic carry case for storage.

Whether you make custom rings or work on ring repairs, this grooved ring mandrel provides clearly marked sizing references in a practical workshop tool.

Technique

How to Use Stainless Steel Grooved Ring Mandrel – US 0–16 & UK A–6 Ring Sizing Tool

Using a grooved ring mandrel is straightforward once you understand what each part of the tool is doing. The laser-marked sizes tell you where you are on the shaft, and the taper itself is what actually shapes or holds the ring.

1
Pick the right size reference
Slide the ring down the mandrel until it stops at the point matching its size. Use the US scale for most American customers, and switch to the UK A–6 markings when a client's ring was purchased or sized abroad.
2
Check an existing ring's size
Before you touch a repair job, slide the ring onto the mandrel and note where it seats. This single step can save you from resizing a ring that didn't need it or from misjudging how much material you'll need to add or remove.
3
Shape or form the ring
Position the ring over the section of the mandrel that matches your target size, then work it with controlled, even hammer strikes. Rotate the ring as you go rather than striking the same spot repeatedly - that's how you get a round, even band instead of an oval one.
4
Resize with care
For resizing work, place the ring at the target size and gradually stretch or shape the metal, checking the fit against the scale as you go. Stop and recheck often rather than trying to get there in one pass.
5
USE THE GROOVE WHEN YOU'RE CUTTING
Need to saw, file, or solder a ring? Slide it onto the mandrel and let the groove give your blade or file a little room to work. Go slowly and keep the ring from shifting so it doesn't warp.
6
CHECK THE FIT AND KEEP IT CLEAN
When you're done shaping, slip the ring back on to make sure it's round and fits your size. After you finish, wipe the mandrel down and keep it dry so the size markings stay easy to read.

Product Details

Features & Technical Specifications

Features

  • Precision-made stainless steel with an even taper for accurate sizing every time
  • Covers both US 0-16 and UK A-6 sizes in one tool
  • Deep laser-marked sizes that stay easy to read for years
  • 14-inch shaft with a curved handle for comfortable bench work
  • Hard plastic carry case included for safe storage and travel
  • Trusted by 20,000+ jewelers across the US

Technical Specifications

Product Type Grooved Ring Mandrel
Material High-grade stainless steel
US Ring Sizes 0–16
UK Ring Sizes A–6
Length 14 inches
Markings Deep, laser-engraved size lines
Handle Curved for a secure grip
Finish Smooth, shiny surface
Included Hard plastic carry case
Primary Uses Sizing, shaping, forming, and resizing rings
Suitable For Jewelers, metal smiths, silversmiths, jewelry makers, repair professionals
Brand Splenor Tools
Returns 7-day hassle-free returns

Buying Guide

Specs, Sizing & What to Order With It

Before you add a stainless steel ring sizing mandrel to your cart, it helps to think through what your bench actually needs.

Who this mandrel is for
  • Professional jewelers and repair shops
  • Metalsmiths and silversmiths
  • Independent jewelry makers and Etsy sellers
  • Jewelry-making students learning to size and form
  • Workshops that handle a steady stream of custom or resized rings
What to order with it

A ring mandrel for shaping rings works best as part of a small kit. Consider adding:

  • A rawhide or nylon mallet for gentler forming
  • A ring-making hammer for heavier shaping work
  • A ring sizer for quick customer measurements
  • Jewelry files and sanding tools for finishing
  • A ring clamp to hold pieces steady while you work
Ring size range
  • US sizes: 0–16
  • UK sizes: A–6

Why Choose

Why Choose Our Stainless Steel Grooved Ring Mandrel?

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A US size range that actually covers your bench
Sizes 0 through 16 mean you're not turning away petite rings or plus-size custom orders. The UK A–6 markings are included on the same shaft, so cross-referencing between sizing systems doesn't require a second tool.
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Deep, laser-marked sizing you can trust
The size lines are laser engraved, not stamped or printed, so they hold up to years of contact with metal, polish, and shop dust. You're reading an accurate mark years into ownership, not a worn guess.
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Solid stainless steel, CNC machined
Every mandrel is cut on a CNC machine for consistent, accurate taper and true roundness - details that matter when you're forming a ring that has to sit flush and even. The steel is hard enough to form rings without denting or distorting under normal hammer work, and the surface finish is smooth enough that it won't scratch soft metals.
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Built for professional and everyday use
At 14 inches long with a curved handle, this professional ring mandrel is sized for real bench work, not a starter kit. It's a tool jewelers, metalsmiths, silversmiths, repair shops, and serious hobbyists can rely on for years.
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Quality Checked Before It Leaves
Every block passes a physical inspection. We check cavity smoothness, surface flatness, and rubber base adhesion before packing.
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Free US Shipping, 7 Days Return
We hold stock. No waiting weeks for a tool you needed yesterday.

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