Komatsu ZJ21 Underground Hard Rock Drills Specs | SMS Equipment

NOW HIRING! Explore a Career at SMS Equipment. View Opportunities

Construction

Forestry

Landscaping

Municipalities

Mining - Surface

Mining - Underground

Road & Aggregate

Waste Management

Attachments

Used Equipment

Rentals

Promotions
Construction Equipment Solutions

Whether you're digging foundations or building communities, our reliable equipment delivers precision for construction work. Select from top brands like Komatsu, BOMAG, and Takeuchi, plus custom attachments to ensure you have the right tools for the job.

See all Construction

Articulated Trucks

Compact Track Loaders

Crawler Carriers

Dozers

Excavators

Graders

Pipelayers

Wheel Loaders

Attachments

Used Equipment

Rentals

Promotions

Promotions

Technologies

Telematics

Financing

Forestry Equipment Solutions

Balancing economic harvesting with sustainable forest management is key to preservation. With rugged, purpose-built forestry equipment from TimberPro and Komatsu, you can manage just that. Our team is ready to assist you no matter how remote your site is.

See all Forestry

Forwarders

Harvesters

Log Loaders

Tracked Feller Bunchers

Attachments

Used Equipment

Promotions

Promotions

Financing

Brands

Landscaping Equipment Solutions

Dense urban areas can limit your ability to work efficiently, but our compact solutions from trusted brands like Takeuchi can help you navigate tightly confined spaces with the horsepower you require.

See all Landscaping

Compact Wheel Loaders

Crawler Carriers

Excavators

Tracked Skid Steers

Attachments

Used Equipment

Rentals

Promotions

Promotions

Technologies

Telematics

Financing

Municipal Equipment Solutions

Reliable equipment keeps communities running efficiently. Whether its for waste management, snow removal, or park maintenance, we supply trusted brands like Komatsu, BOMAG, and Takeuchi, with flexible warranties, on-site support, and smart technology to meet your needs.

See all Municipalities

Articulated Trucks

Cold Milling Machines

Cold Recycling & Soil Stabilizers

Compactors

Dozers

Excavators

Graders

Pavers

Refuse Compactors

Tracked Skid Steers

Wheel Loaders

Attachments

Used Equipment

Rentals

Promotions

Cooperative Purchasing (Canoe/Sourcewell)

Promotions

Technologies

Telematics

Financing

Surface Mining Equipment Solutions

Surface mining operations are increasingly complex. Whether you’re greenfield, brownfield, or fully operational, we have the equipment and technology solutions you need from the world’s leading brands like Komatsu — from haul trucks and dozers to loaders and more.

See all Mining Surface

Dozers

Electric Trucks

Excavators

Graders

Mechanical Trucks

Wheel Loaders

Used Equipment

Rentals

Attachments

Technologies

Decarbonization

Telematics

Financing

Underground Mining Equipment Solutions

Helping meet the world’s need for resources requires reliable equipment and responsive support. With SMS Equipment, you’ll have a trusted partner that delivers both, by working together to maximize your productivity.

See all Mining Underground

Underground Load Haul Dump

Underground Haulage Trucks

Underground Hard Rock Drills

Underground Hard Rock Bolters

Attachments

Decarbonization

Financing

Road Construction Equipment Solutions

In the tough business of road construction, you need industry-leading heavy equipment products from trusted brands like Komatsu and BOMAG. Along with our on-site support teams, we’ll help you get your job done on time and on budget.

See all Road Aggregate

Articulated Trucks

Cold Milling Machines

Cold Recycling & Soil Stabilizers

Compactors

Dozers

Excavators

Pavers

Wheel Loaders

Promotions

Promotions

Technologies

Financing

Waste Management Equipment Solutions

Whether it’s for garbage compaction, landfill management, or transfer stations, we’re proud to offer purpose-built waste management equipment from BOMAG and Komatsu that meets your specific needs.

See all Waste Management

Dozers

Excavators

Refuse Compactors

Wheel Loaders

Promotions

Technologies

Financing

Attachments of Every Type

Whether you’re looking for concrete pulverizers or harvesting heads, we’re proud to offer a complete range of attachments that meet your needs — as well as your standards.

See all Attachments

Concrete Pulverizers

Demolition Shears

Harvester Heads

Hydraulic Hammers

Multi-Jaw Demolition Tools

Pile Drivers

Plate Compactors

Clearance Attachments

Promotions

Financing

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Pre-owned Equipment Solutions

You don’t have to buy new to get the job done right. We’re proud to offer pre-owned equipment from some of the world’s leading brands.

See all Used Equipment

Used Articulated Trucks

Used Compactors

Used Dozers

Used Forwarders

Used Hydraulic Excavators

Used Motor Graders

Used Track Loaders

Used Wheel Loaders

Our Brands

Rentals

Promotions
Buy Parts Online

Attachments

Undercarriage

Ground Engaging Tools & Wear Parts

Remanufactured Parts

Maintenance Parts

Safety Equipment

Clearance

Promotions
Buy Parts Online

We provide support for all areas of your equipment, including powertrain, hydraulic systems, lighting, operator environment, undercarriage, electrical systems, cooling systems and more. Our network of parts and components is fully integrated between our branches and our manufacturers as well as with other distributors throughout North America.

Buy Parts Online

Used & Surplus Parts Store

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Attachments

SMS Equipment holds a unique position in the industry as a one-stop supplier of the most complete range of attachments for your equipment.
We offer only world renowned brand names that meet your standards of reliability and productivity.

Demolition Shears

Plate Compactors

Hydraulic Hammers

Multi-Jaw Demolition Tools

Concrete Pulverizers

Harvester Heads

Pile Drivers

Clearance Attachments

Financing

Promotions

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Undercarriage

SMS Equipment has undercarriage repair centers that perform track pad swaps, turn pins and bushings, rebuild idlers, rollers and re-grouser track pads. We offer a practical management approach to ensure you achieve the best performance and durability from your undercarriage components.

Berco Undercarriage

Komatsu Undercarriage

Financing

Promotions

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Ground Engaging Solutions

Even the harshest construction and mining conditions are no match for our ground engaging tools and parts. Optimize your operation with wear parts designed to endure, saving you both time and money.

View all ground engaging solutions

Edges & Blades

Chutes

Buckets - Excavators & Wheel Loaders

Specialized Wear Parts

Bimetallic Wear Products

Lip Systems & Shrouds

Tooth Systems

Screens

Pins & Bushings

Truck Bed Liners

Shovel Bucket Components

Financing

Promotions

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Remanufactured Parts

Mining Components

Electrical Motors, Generators & Alternators

Powertrains & Suspensions

Hydraulic Components

Custom manufacturing

Promotions

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Consumable Solutions

From oils to filters to batteries, we have the consumables you need to keep your equipment running exactly as it should — including the expertise to keep you one step ahead.

View all consumable solutions

Oils

Grease

Filters

Coolant & Antifreeze

Batteries

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Safety Equipment

At SMS Equipment, one of our core values is to care for each other without exception. We strive to set exceptional standards within our industries to demonstrate care for all internal and external stakeholders. We are proud to distribute and partner with business partners, providing you and your employees with exceptional safety products.

View all safety equipment

Body Blocks

Evolution Super Jack

Heavy Duty Stands

Multi-Handler & Attachments

Stairs & Platforms

Wheel Chocks

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Cost-Saving Solutions

Save big on our selection of clearance parts and attachments at drastically reduced prices. Let us help you find what you need, while keeping more money in your pocket.

View all clearance

Clearance, used, surplus parts

Clearance attachments

Promotions
Maintenance & Repair

Rebuilding & Manufacturing

Rentals

Training

Warranties

Financing

Telematics

Promotions
Maintenance and Repair Solutions

Our range of maintenance and repair services will help you quickly get back on track. Whether emergency repair or preventative maintenance, in-shop or on-site, we will help keep your equipment working exactly as it should.

View all service solutions

Mechanical

Electrical

Welding

Maintenance Programs

Undercarriage

Field Services

Remanufacturing

Financing

Promotions

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Rebuilt Solutions

Your equipment should be designed with your operation in mind. Let us show you what’s possible with our rebuilding and remanufacturing capabilities that build custom equipment solutions tailored to your specific operational goals.

Custom Manufacturing

Parts Remanufacturing

Truck Body Manufacturing

Promotions

Financing

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Rentals

Rentals

Training Solutions

Invest in your job site safety and productivity with the right training and support from our world-class specialists. From best practices to emerging technologies, we’ll make sure your team has everything they need to work safely and efficiently.

View all Training

Operator Training

Technical Support

Technical Training

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Warranty Solutions

Our partnership comes with peace of mind. With comprehensive warranties on equipment and components, we’ve got you covered so you can rest easy knowing your investment is secure.

View all Warranty

SMS Equipment Warranties

OEM Warranties

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Financing Solutions

Enjoy the flexibility of financial options that meet your needs. With competitive rates in both Canadian and US dollars, and rent-to-purchase options, we’ll work with you to determine the best financing solution for your business.

View all Financing

Financing Options

Promotions

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Telematic Solutions

Maximize utilization and limit downtime with real-time data, transmitted from your machines directly to you. Make strategic data-informed decisions, that save time and money, whether your boots are on the ground or on the go.

View all telematics

MyKomatsu

Komtrax

Bomag Telematic

Takeuchi Fleet Management

Technologies

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Promotions
By Industry

By Need

By Solution
Technologies by Industry

No matter your industry, technology will help you work both safer and smarter. Our technology experts will help you discover the latest advancements for your industry and operation.

View technologies by industry

Construction

Mining

Decarbonization

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Technologies by Need

Advanced technologies can be the solution to your specific needs. Whether it’s decarbonization, safety, labour shortage or productivity, our technology experts will help you discover the possibilities.

View technologies by need

Decarbonization

Site Safety

Efficiency

Labour Shortage

Cost Savings

Electrification

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents

Technologies by Solution

Discover the variety of solutions made possible with new and emerging technology. From telematics to autonomous haulage to machine control, our technology experts will help you find a smarter and more efficient way to get it done.

View all technology solutions

Autonomous Haulage Systems

Collision Awareness Management

Machine Control

Telematics

Trolley Assist

Smart Construction Dashboard

Smart Construction Remote

Smart Construction Base & Rover

Decarbonization

Support for IMC

Brands

Komatsu
Takeuchi
BOMAG
TimberPro
KRents
News & Resources
News & Resources

Stay ahead by being in the know with SMS Equipment news and resources. Discover trends, expert insights and latest developments that affect you and your business.

View all news and resources

Customer Stories

Employee Voices

News

Press Releases

Newsletter subscription
Careers

Locations/Contact Us

About Us

News & Resources
Careers

At SMS Equipment, we’re more than machines. Join our team of world-class specialists and build your career with us. Explore our open positions near you and across the country.

View careers

Open Positions

Why work for SMS Equipment

Heavy Equipment Technician Careers

Frequently Asked Questions

Employee Voices

Branch Locations

Connect with us and explore the possibilities. Visit us at any of our branch locations across Canada and Alaska or give us a call. We look forward to hearing from you.

View all branches

Acheson / Corporate

Anchorage

Baie / Comeau

Calgary

Campbell River

Chetwynd

Chicoutimi

Dartmouth

Edmonton

Elkford

Etobicoke

Fairbanks

Fort Frances

Fort McMurray

Fort St. John

Fredericton

Grande Prairie

Hinton

Houston

Kamloops

Kelowna

Laval

Moncton

Paradise

Prince George

Red Deer

Regina

Saskatoon

St. Augustin

St. Bruno

Surrey

Thunder Bay

Timmins

Trois Rivières

Val d'Or

Wabush

Whitehorse

Williams Lake

Winnipeg

Yellowknife

About Us

The right partnership makes everything possible. See what sets us apart as a collaborative growth partner committed to your success with comprehensive solutions unique to your operation.

View about us

Who We Are

Our Partners

Safety Vision

Giving Back

Executive Leadership Team

Your Partner in Productivity

Your Partner in Safety

Your Partner in Service & Support

Your Partner in Sustainability

Your Partner in Technology

Careers

Employee Voices

News & Resources

Stay ahead by being in the know with SMS Equipment news and resources. Discover trends, expert insights and latest developments that affect you and your business.

View all news and resources

Menu

Komatsu ZJ21

ZJ21

Komatsu ZJ21

Boom Quantity

1

Min Drill Power

13 HP10 kW

Max Drill Power

28 HP21 kW

Min Feed Length

7′11″2438 mm

Max Feed Length

16′4879 mm

Gallery

Request a Quote

Give Us a Call At (780)451-2630