Hammer Strength Plate Loaded Ground Base Jammer | GB-J
Was | Now $3,413.00
Save : $300
About
Built for raw power and explosive performance, the Hammer Strength Plate Loaded Ground Base Jammer | GB-J is the real deal—no imitations, no compromises. While racks try (and fail) to mimic its movement, only the Jammer delivers the perfect blend of converging and diverging motion, unlocking true athletic drive.
Designed in the ‘90s and still unmatched today, it’s the gold standard for developing force, power, and on-field dominance. When it comes to training like an athlete, there’s no substitute—there’s only the Jammer.
Hammer Strength
Built To A Higher Standard
We share a commitment to excellence. Through purposeful engineering and lasting partnerships, we empower those who possess the discipline to train like champions to transform ambition into greatness.
Tested beyond industry Standards
Our commitment to quality is non negotiable. We certify our products to ASTM and EN standards, then surpass these standards up to 10x. You need confidence when you train, our diligent stress testing in the lab results in the performance you deserve.
Coach-approved. Athlete-validated.
As the needs of performance strength training continue to evolve, our products do too. With collaborations and partnerships with coaches and athletes, we continue to innovate – helping champions achieve their goals.
Join the Elite
Being trusted by teams across premiere sports leagues including the NFL, NBA, and MLB means that when you choose Hammer Strength, you’re stepping on the field, court, or diamond with the same winning edge as the elite.
Functionality through simplicity
At the core of our philosophy lies a profound belief in the power of simplicity. Resulting in designs that are purposeful and fluid with no sensation of linkage between user and machine. This belief has led us to pioneer over 30 patents and we’re not stopping there.
| Warranty | |
| Frame: | 10 Years |
| Pillow Blocks, Pulleys, Weight Plates & Guide Rods | 5 Years |
| Bearings, Grips, Cables & Belts | 1 Year |
| Upholstery: | 90 days |
| Specifications | |
| Dimensions (L x W x H): | 66 in x 79 in x 83 in (167 cm x 202 cm x 212 cm) |
| Machine Weight: | 370 lb (168 kg) |
| Max Load Capacity (per arm): | 4 x 45 lb plates (4 x 20 kg plates) |
| Starting Resistance (per arm): | 8 lbs (3.6 kg) |
| Storage Weight Horns: | 6 |
| Recommended Plate Mix: | 4 x 45 lb plates, 4 x 25 lb plates, 4 x 10 lb plates |
FEATURES
Hammer Strength Plate Loaded Ground Base Jammer | GB-J Key Features:
- Two independent arms follow a natural arc, enabling powerful unilateral or bilateral pressing with balanced muscle development and athletic force transfer
- Trains total-body force output—activating legs, hips, core, and upper body—ideal for sport-specific, on-field-like movements
- Angled grips optimize wrist alignment and leverage, supporting natural pressing trajectories
- Accommodating resistance setup via band pegs enhances loading through the concentric phase, perfect for speed and power training
- Constructed from 11-gauge steel with powdered finish and anchoring-ready feet
Converging / Diverging Arms
The key to the Jammer’s unmatched power transfer lies in its converging and diverging arm path. Unlike rigid, linear pressing arms, this design follows the body’s natural movement patterns, delivering a more athletic, explosive, and functional pressing motion that translates directly to sport and strength performance.
Ergonomic Handles
The Jammer’s angled, ergonomic handles provide a natural and powerful grip position, reducing wrist strain and maximizing force output. Whether driving through a press or loading up for explosive reps, the handles put the athlete in total control—allowing for optimal leverage and peak performance.
Band Pegs
Take your power development to the next level. The built-in band pegs allow athletes to add accommodating resistance, increasing tension through the full range of motion and reinforcing explosive strength at the top of each rep. Perfect for athletes who need speed, power, and controlled force production.
BUILT FOR EXPLOSIVE POWER
Athletes don’t just lift—they drive, push, and explode. The Ground Base® Jammer trains force production in the most athletic way possible, mimicking the powerful pressing movements seen in sport. Whether it’s linemen battling in the trenches or sprinters driving out of the blocks, the Jammer builds the kind of strength that translates to real performance.
UNMATCHED SINCE THE ‘90S
The Ground Base® Jammer isn’t new—it’s legendary. While other companies try to replicate its movement with half-measures, only Hammer Strength delivers the true Jammer experience. Designed in the mid-90s and still dominating weight rooms today, it remains the ultimate training tool for explosive strength.
PLATE LOADED MACHINES
Built for Strength, Designed for Results
Equipment for exercisers looking to bridge the gap between selectorized equipment and free weights. Simple mechanics create a smooth and reliable defined path of motion and offer effective strength training.
BUILT TO LAST, BUILT TO PERFORM
HAMMER STRENGTH PLATE-LOADED
Hammer Strength Plate-Loaded the #1 brand of plate-loaded equipment in the world. Hammer Strength has spent decades perfecting machines that move as you move, challenging you to reach your full potential with every rep. Choosing Hammer Strength is a declaration. It’s a statement that you refuse to settle for mediocrity. It’s about pushing your limits, embracing the burn, and emerging stronger, and more confident than ever before.
FRAME COLORS
Related Products
- Sale!
$2,888.00 Hammer Strength Plate Loaded T-Bar Row | PL-TBR
- Sale! $3,938.00
Hammer Strength Iso-Lateral Shoulder Press | IL-SP
- Sale! $4,673.00
Hammer Strength Plate Loaded Pullover | PL-PO
- Sale! $3,488.00
Hammer Strength Plate Loaded Seated Dip | PL-DIP
- Sale! $2,573.00
Hammer Strength Plate Loaded 4-Way Neck | PL-4W
- Sale! $5,198.00
Hammer Strength Iso-Lateral Chest / Back | IL-CB
- Sale! $2,573.00
Hammer Strength Plate Loaded Seated / Standing Shrug | PL-SH
- Sale! $3,518.00
Hammer Strength Plate Loaded Lateral Raise | PL-LR
- Sale! $4,800.00
Hammer Strength Plate Loaded Super Fly | PL-FLY
- Sale! $3,938.00
Hammer Strength Iso-Lateral Super Incline Press | IL-FMP
Fast Delivery
Always on Time. In-Home Delivery & Assembly Services Available.
Lower Price Guarantee
Lowest Prices with the Top Manufacturers.
Customer Service
Phone and Online Specialists.
(800) 771-2730
Fast Delivery
Always on Time. In-Home Delivery & Assembly Services Available.
Lower Price Guarantee
Lowest Prices with the Top Manufacturers.
Customer Service
Phone and Online Specialists.
(800) 771-2730