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Stainless Steel Un-Grooved Ring Mandrel – US Sizes 1–16 Ring Sizing Tool

Stainless Steel Un-Grooved Ring Mandrel – US Sizes 1–16 Ring Sizing Tool

$24.99 USD
$24.99 USD
Sale Sold out

Achieve accurate ring sizing and smooth metal forming with a precision-crafted stainless steel un-grooved ring mandrel. Its polished surface helps measure, shape, resize, and straighten rings without leaving unwanted marks, making it an essential tool for every jewelry bench.

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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What Is a Stainless Steel Un-Grooved Ring Mandrel?

A stainless steel un-grooved ring mandrel (US sizes 1–16) is a tapered bench tool used to measure, shape, size, and straighten rings. Its smooth, polished surface protects gold, silver, platinum, copper, and brass while you're forming the metal, instead of stamping a texture into it the way a grooved mandrel can.

Compared to a grooved mandrel, this un grooved ring mandrel offers more control when you're working close to a piece's final finish—resizing a customer's band, forming a new ring, or checking a size before the last polish. It's a dependable bench tool for both professional jewelers and hobbyists who want accurate, repeatable results.

If you're looking for a reliable stainless steel ring mandrel US sizes 1-16 or planning to order one online, choosing a well-made tool can help improve both the accuracy of your sizing and the overall forming experience.

BUYING GUIDE

Specs, Sizing & What to Order With It

When you're ready to buy, here's what to know so there are no surprises when it arrives.

Surface — Smooth (Un-Grooved)
  • Fully polished shaft, no grooves cut into the surface
  • Won't transfer lines or texture onto soft precious metal
  • The safer choice whenever you're working close to a piece's final finish
Size Range — US Sizes 1–16
  • Covers the complete US sizing range used by jewelers
  • Deep, laser-marked numbers stay legible for years
  • One mandrel replaces a drawer full of single-size tools
Suitable Metal
  • Gold, silver, platinum, copper and brass all work well
  • These are the soft metals standard in jewelry production
  • Avoid using it as a striking surface for hardened steel or titanium blanks
What to Order Alongside This Mandrel
  • A dome-chasing, flat-chasing hammer for tapping a ring round without marking it
  • A ring stretcher or ring reducer, for fine-tuning a size after the mandrel gets you close
  • Ring-sizing gauges, to confirm a customer's size before you start forming
  • A bench block, for a stable steel surface during heavier work
  • A ring clamp, to hold a ring steady for stone setting or engraving

PRODUCT DETAILS

Features & Technical Specifications

Features

  • Manufactured from premium-quality stainless steel for long-lasting durability
  • A smooth, un-grooved polished surface reduces scratches on precious metals
  • Precision-engraved US sizes 1–16 for accurate reading at a glance
  • Ideal for measuring, shaping, resizing and straightening rings
  • Heavy-duty build stays stable during bench work
  • Tapered shaft lets rings slide on and off without forcing
  • Comfortable curved handle for a secure grip during hammering
  • Suitable for gold, silver, platinum, brass, copper and titanium

Technical Specifications

Surface Finish Polished, un-grooved shaft for a clean, mark-free surface
Material Premium Stainless Steel
Product Type Ring Mandrel
Size Range US Sizes 1–16
Length 13″ (approx.)
Metals Supported Gold, silver, platinum, copper, brass & other soft metals
Manufactured By Splenor Tools

TECHNIQUE

How Jewelers Use a Ring Mandrel at the Bench

There's a basic way to use a ring mandrel, and then there's what professional jewelers actually do with it. Here's a practical walkthrough of both.

01
Slide the Ring On
Let the ring slide down the shaft under its own weight until it stops naturally. Never force it — that's how you get a false reading.
02
Read the Size
Check the engraved US size marking where the inside edge of the ring lands on the shank.
03
Shape or Resize
Tap lightly with a nylon or rawhide hammer while rotating the ring evenly around the mandrel—light, consistent strikes beat a few heavy ones every time.
04
Recheck the Fit
Slide the ring back down the shaft and confirm the size and roundness before moving on.
05
Finish Up
Remove the ring and inspect the shape before polishing or setting any stones.

WHY CHOOSE

Why Choose Our Ring Mandrels

There are cheaper ring mandrels out there, and there are more expensive ones. Here's an honest account of where ours sits—and why it's the one we'd choose ourselves.

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Solid Stainless Steel Throughout
Not a thin plated shell; this holds its shape and polish through years of daily bench use.
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Genuinely Polished Surface
Checked by hand for a true un-grooved finish, so it won't telegraph a texture onto your finished piece.
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Full US 1–16 Range
One mandrel covers delicate bands through large statement rings; no second tool needed.
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Deep Laser Markings
Sizes stay easy to read after years of handling, oils, and polishing dust.
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Quality Checked Before It Leaves
Every mandrel is inspected for surface finish and marking depth before it's packed.
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Free US Shipping, 1–3 Day Delivery
We hold stock. No waiting weeks for a tool you needed yesterday.

Frequently Asked Questions

Get answers to common questions about our products and services