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Delta 40K 3D Printed Bottom

Transform your workout experience with the "Delta-40K 3D Printed Bottom" from Hephaestus Athletica. Designed to replace the standard cast iron base of the D40K, this innovative shell drops the starting weight to just 6kg (13.2 lbs.).

Delta 40k Starting Weight - 14kg (30lbs)

Delta 40k starting weight w/ 3d Printed Bottom - 6kg (13lbs)

$40.00
$40.00

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Availability: 15 in stock
Color: Red

What's included

3D Printed Spacer for your Delta 40K

Gear Specs

  • Colors: Red or Grey
  • Delta 40k Starting Weight - 14kg (30lbs)
  • Delta 40k starting weight w/ 3d Printed Bottom - 6kg (13lbs)

Why the Delta-40K Shell?

  • Ultimate Accessibility: By significantly lowering the entry weight, we’ve made high-level kettlebell training accessible to everyone—from beginners building their foundation to athletes focusing on high-volume technique.
  • Precision Progression: Don’t let heavy jumps stall your progress. This shell allows you to scale up in small, manageable increments, ensuring a safe and consistent path to your strength goals.
  • The "Lifetime" Implement: With the Delta-40K Shell, your kettlebellbecomes a true lifetime tool. It evolves with you, providing the versatility needed for everything from rehab and warm-ups to elite-level strength conditioning.
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Product FAQS

Will this work with the Delta-32K?

Short answer, no this is designed for the Delta-40K

Why the Delta-40K Shell?

  • Ultimate Accessibility: By significantly lowering the entry weight, we’ve made high-level kettlebell training accessible to everyone—from beginners building their foundation to athletes focusing on high-volume technique.
  • Precision Progression: Don’t let heavy jumps stall your progress. This shell allows you to scale up in small, manageable increments, ensuring a safe and consistent path to your strength goals.
  • The "Lifetime" Implement: With the Delta-40K Shell, your kettlebellbecomes a true lifetime tool. It evolves with you, providing the versatility needed for everything from rehab and warm-ups to elite-level strength conditioning.

Do I really need the 3D-printed bottom?

  • Because the starting weight of the Delta 40k is 14kg (30lbs) Mark Wildman wanted to offer a kettlebell that not only loaded to 40kg (88lbs) but also have a starting weight that was manageable for anyone just starting their kettlebell journey.
  • Having the 3D printed spacer gives you the opportunity to have 1 kettlebell that will last you a lifetime of training. 

Why starting light is important

  • The most important position to understand and master is the rack position. With a starting weight of 6kg or 13 lbs it gives everyone no matter your size the opportunity to master the rack position at a light entry weight while minimizing injury. 

Elevate Your Training with the "Delta-40K" 3D Printed Bottom

Transform your workout experience with the "Delta-40K 3D Printed Bottom" from Hephaestus Athletica. Designed to replace the standard cast iron base of the D40K this innovative shell drops the system's starting weight to just 6kg (13.2 lbs.).

Why the Delta-40K Shell?

  • Ultimate Accessibility: By significantly lowering the entry weight, we’ve made high-level kettlebell training accessible to everyone—from beginners building their foundation to athletes focusing on high-volume technique.

  • Precision Progression: Don’t let heavy jumps stall your progress. This shell allows you to scale up in small, manageable increments, ensuring a safe and consistent path to your strength goals.

  • The "Lifetime" Implement: With the Delta-40K Shell, your kettlebellbecomes a true lifetime tool. It evolves with you, providing the versatility needed for everything from rehab and warm-ups to elite-level strength conditioning.

Redefine your limits. Start lighter, finish stronger.

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Everything you need to know

Delta 32K vs. Delta 40K vs. Cast Iron Kettlebell: What's the Difference?

Explore the why behind the different style of kettlebells, to pick the one that best fits your needs.
Adjustable, Competition-Style Design
The Delta 32K and Delta 40K are both adjustable kettlebells that load in precise 0.25-kilogram (0.55 lb) increments — the finest micro-loading available on the market today. No other company currently offers this level of granularity. Both bells are also built to competition specifications, meaning the handle diameter, window (the space between the handle and the globe), and globe dimensions stay identical at every weight setting. This consistency removes variables as you progress, so your technique stays sharp through swings, cleans, rack position, and snatches — you're only changing the load, never the feel of the bell.
Built to save space - and money
If space is a priority, an adjustable kettlebell is the smarter choice. The upfront investment is higher, but when you break it down by price per weight setting, adjustable bells actually cost less than building out an equivalent rack of fixed-weight kettlebells: Delta 32K — $4.50 per weight setting (81 settings) Delta 40K — $7.00 per weight setting (104 settings)
Where Cast Iron Still Wins
Cast iron kettlebells vary in size and shape from brand to brand, but they remain the standard in most local gyms. Their geometry — particularly the flared handle — offers a real advantage in certain movements, like the kettlebell halo and goblet squat, where that flare gives you a more secure grip.
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