CB1-FORGED Cavity Back

The grindworks CB-1 FORGED is a smallish cavity back iron designed for players who want a great feeling all around iron. This precision forged S20C one piece cavity will appeal to better players who want control and workability as well as better golfers who don’t mind a bit of forgiveness as well.

We decided that not only should the cavity feel and perform great, but that looks were equally important as well. While many irons today have evolved to have sharper lines and edges in their designs, we focused on keeping gentle curves that keep the iron itself clean and simple.

We implemented a feature we call Horizontal CG Flow which sees the CG change progressively across the set in a horizontal direction. HCF sees a cutaway toe, and more weight towards the heel, allowing the 4, 5, and 6 irons to rotate square faster, helping golfers square to the ball more consistently for better impact and more distance. The 7 iron has neutral weighting while the 8, 9 and PW see progressively more heel relief allowing for more control and workability for attacking the pin. The grindworks CB-1 FORGED is the forgiving all around cavity back with great feel.

Number 4# 5# 6# 7# 8# 9# PW
Loft ( ° ) 23 26 30 34 38 42 46
Lie ( ° ) 60.5 61 61.5 62 62.5 63 63.5
Offset (mm) 3.4 3.2 3 2.8 2.7 2.6 2.5

Shafted Specs for reference – N.S. PRO Modus3 Tour 105 S

Number 4# 5# 6# 7# 8# 9# Pw
Length (inches) 38.25 37.75 37.25 36.75 36.25 35.75 35.25
Balance D1.5 D1.5 D1.5 D1.5 D1.5 D1.5 D1.5
  • CONFORMING to R&A Groove Rule
  • Outer Hosel Diameter: 13.5mm
  • Inner Hosel Diameter: 9.2mm (Taper Tip)
  • Hosel Depth: 30mm
  • Right Handed Only
grindworks CB1-FORGED
Materials S20C Forged Carbon Steel
Finish Chrome Satin
Type Cavity Back
Design Horizontal CG Flow
Characteristics Feel, Stability, Accuracy, Distance
Target Athlete golfer, better player, improving player

As a premium Japanese components brand, this grindworks product is available pre-assembled with a standard shaft and grip (listed below) or custom fit with your choice of shaft and built to your specs by any grindworks authorized dealers.

grindworks original cord grip (round or ribbed)


grindworks original rubber grip (round only)


N.S. Pro ModusTour 105 Steel Shaft


N.S. Pro 950 GH Steel Shaft



Like the MB1-Forged, we wanted the CB1-Forged to feature softer lines and smoother curves. We believe these type of lines have a better visual effect on the golfer not only at address but also when looking at an iron in general. While we believe in the saying “simple is best” we still wanted to implement functional design that would still make the iron unique and help it perform optimally.

Great impact has such a huge bearing on the results of a shot, the feel, the direction, the distance. the spin… so squaring up to the ball for a pure strike is essential. We designed something we call Horizontal Center of Gravity Flow which moves the CG horizontally from heel to toe through the long to short irons, we were able to create a iron with better impact.

A cutaway toe area on the long irons allows the weight and CG to shift more towards the heel of the iron helping long irons square to the ball quicker for stronger more powerful impact. As the irons get shorter, the cutaway shrinks and moves towards the heel side (the 7 iron right in the middle of the set has no toe or heel cutaway).  The short irons feature a CG more towards the toe thanks to a heel cutaway which allows for more control, less misses with pulls or hooks and even more versatility since the cutaway on the sort irons can be worked as heel relief.