---
product_id: 181162198
title: "Earl Diamond Super Heavy Duty Drill Chuck 5/8\" Capacity with R8 Shank Precision Integrated & Chuck Jaw Tightening Key (R8-B18)"
brand: "earl diamond"
price: "$3384"
currency: MXN
in_stock: true
reviews_count: 13
category: "Earl Diamond"
url: https://www.desertcart.mx/products/181162198-earl-diamond-super-heavy-duty-drill-chuck-5-8-capacity
store_origin: MX
region: Mexico
---

# 5/8" (16mm) Clamping Range Precision 0.005" T.I.R. R8 Shank Compatibility Earl Diamond Super Heavy Duty Drill Chuck 5/8" Capacity with R8 Shank Precision Integrated & Chuck Jaw Tightening Key (R8-B18)

**Brand:** earl diamond
**Price:** $3384
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your drill press game with precision and power that professionals swear by!

## Quick Answers

- **What is this?** Earl Diamond Super Heavy Duty Drill Chuck 5/8" Capacity with R8 Shank Precision Integrated & Chuck Jaw Tightening Key (R8-B18) by earl diamond
- **How much does it cost?** $3384 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/181162198-earl-diamond-super-heavy-duty-drill-chuck-5-8-capacity)

## Best For

- earl diamond enthusiasts

## Why This Product

- Trusted earl diamond brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Mill-Grade Precision:** Achieve ultra-tight 0.005" runout for flawless metal and woodworking projects.
- • **Super Heavy Duty Build:** Crafted from hardened 40CR steel (HRC60) for unmatched durability and longevity.
- • **Complete with Chuck Key:** Includes a precision chuck jaw tightening key for secure, slip-free bit holding every time.
- • **Versatile 5/8" Capacity:** Clamps bits from 3mm up to 16mm (1/8"–5/8") to handle a wide range of drill sizes.
- • **Seamless R8 Shank Integration:** Perfectly fits drill presses and lathes with R8 spindle for professional-grade stability.

## Overview

The Earl Diamond Super Heavy Duty Drill Chuck (R8-B18) is a precision-engineered tool accessory featuring a hardened 40CR steel body with HRC60 hardness, a 5/8" (16mm) clamping range, and ultra-low 0.005" total indicated runout for mill-like accuracy. Designed for R8 shank drill presses and lathes, it includes a chuck jaw tightening key for secure bit clamping, making it an essential upgrade for serious metalworking and woodworking professionals.

## Description

Earl Diamond Super Heavy Duty Drill Chuck 5/8" Capacity with R8 Shank Precision Integrated & Chuck Jaw Tightening Key (R8-B18) - desertcart.com

Review: Great value and fits Porter Cable PCB660DP - The stock chuck in my Porter Cable PCB660DP was never that great to begin with (runout) and over the years started clamping unevenly. I worked around it by unclamping/reclamping the bit and it was good enough for woodworking. Lately I've gotten into metal working and need a DP with mill-like accuracy. A relatively cheap, big-box store drill press isn't a mill and has a lot more driveline slop. Bought this chuck and arbor combo based on the reviews, to just replace the entire stock assembly and it was a good gamble. Arbor comes packed in it's own hard plastic sleeve and the chuck well-greased up in a plastic bag. Quality of both is very good. Surfaces are clean, smooth and free of tooling marks. The chuck is a little stiff to open/close, but it will loosen up with use. Overall, I think this is a great value.
Review: Works well - Works well on my Jet lathe 1224.

## Features

- Material: 40CR, Hardness HRC60.
- Clamping Range: 3-16mm (1/8"~5/8").
- R8 Shank: Suitable for drill presses or lathes spindle accepts R8 shank.
- Maximum T. I. R. does not exceed,accuracy: 0.005".
- Component: Chuck jaw tightening key.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B081SSSLPV |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #72,142 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #47 in Power Drill Chucks |
| Capacity | 0.63 Inches |
| Color | R8-b18 |
| Customer Reviews | 4.5 4.5 out of 5 stars (555) |
| Cutting Diameter | 0.63 Inches |
| Date First Available | January 6, 2020 |
| Global Trade Identification Number | 00034948681748 |
| Included Components | Chuck Key |
| Item Weight | 2.77 pounds |
| Manufacturer | Earl Diamond |
| Product Dimensions | 4.65 x 2.33 x 3.55 inches |
| Thread Size | 1-8 UNC |
| UPC | 034948681748 |

## Product Details

- **Brand:** Earl Diamond
- **Compatible Devices:** Drilling Machine
- **Item Diameter:** 0.63 Inches
- **Item Weight:** 1.26 Kilograms
- **Material:** 40CR

## Images

![Earl Diamond Super Heavy Duty Drill Chuck 5/8" Capacity with R8 Shank Precision Integrated & Chuck Jaw Tightening Key (R8-B18) - Image 1](https://m.media-amazon.com/images/I/61sNAq96+8L.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great value and fits Porter Cable PCB660DP
*by C***O on July 22, 2022*

The stock chuck in my Porter Cable PCB660DP was never that great to begin with (runout) and over the years started clamping unevenly. I worked around it by unclamping/reclamping the bit and it was good enough for woodworking. Lately I've gotten into metal working and need a DP with mill-like accuracy. A relatively cheap, big-box store drill press isn't a mill and has a lot more driveline slop. Bought this chuck and arbor combo based on the reviews, to just replace the entire stock assembly and it was a good gamble. Arbor comes packed in it's own hard plastic sleeve and the chuck well-greased up in a plastic bag. Quality of both is very good. Surfaces are clean, smooth and free of tooling marks. The chuck is a little stiff to open/close, but it will loosen up with use. Overall, I think this is a great value.

### ⭐⭐⭐⭐⭐ Works well
*by R***D on August 31, 2025*

Works well on my Jet lathe 1224.

### ⭐⭐⭐⭐⭐ Solid chuck. Taper fit holds tight. Drill bits didn't slip.
*by E***O on July 22, 2022*

I bought the 1/2" chuck with R8 shank to use on a Bridgeport mill. I'm using this in a low use application, not a production shop. It smoothly opens and closes across the range. I didn't notice any issues seating the tapered shank. I degreased the mating chuck taper and shank taper. I then deburred both tapers with fine stones (this probably wasn't necessary). I warmed up the chuck in the oven and put the shank in the freezer. I put the two together and quickly gave it a whack with a lead hammer. I drilled some 1/4" holes in aluminum and cold rolled steel so far. I spot drilled first with a collet and then drilled with the chuck. The old mill held under 0.002" on size, and location between holes. No complaints so far. I'll update this review if something comes up. So far I'm happy I took a chance on this affordable option.

## Frequently Bought Together

- Earl Diamond Super Heavy Duty Drill Chuck 5/8" Capacity with R8 Shank Precision Integrated & Chuck Jaw Tightening Key (R8-B18)
- Mitutoyo 050101, Edge Finder, 3/8" Dia. Shank, .200" Dia. Tip
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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-03-08*