ZX Modular Boring Tools

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Boring just became interesting

ZX Modular Boring Tools (MBT) offer versatility and economy when machining bores, counter-bores, tapers, threads, and complex contours inside components, over a wide range of diameters. These tools offer the highest cutting speeds and material removal rates available.

The MBT series is available in single-slide (MBT-S) and twin-slide (MBT-T) versions. All MBT tools feature 2:1 actuation ratio for easy programming.

MBT50 back-end

The unique modular design makes adjustment of length and configuration not only fast and easy, but cost effective too. The MBT range can simply be converted for valve seat pocket machining, bottle boring or other extended-reach applications with the addition of extensions and pilot supports – adding to their versatility and adaptability, whilst eliminating the need for additional tools. With a long tool slide stroke, that is supplemented by using different cartridges, they can cover an even wider diameter range – no need to change the tool slide(s) or remove the head from the machine. The tools can perform versatile forward and back boring operations, such as back counter-bores, internal grooves, faces, and bottle bores. Stepped and tapered bores are machined without tool changes offering exceptional concentricity. Accuracy is maintained as the tool slide(s) adjusts for various diameters whilst the tool stays on the same bore centerline.

Product features:

  • Bottom-facing capability available for blind bores.
  • Twin-slide tools offer balanced cutting forces for high feeds and speeds and high material removal rates.
  • Internal through-tool coolant is standard.
  • Fully enclosed actuation mechanism: No chip packing.
  • Internal forward hard stop and anti-torque features protect the tool in case of mishaps.
MBT50 Cartridge
Set of MBT with bonnet
Valve seat Pocket
ZX Seat Pocket Machined
MBT250 on machine

Modular Design. Increased Functionality.

From short bores to long components with one extendable modular system.

ZX Tooling Stacker
Modular Boring Tool Grooving
MBT50 modular connection
Bottle Boring process
Seat Pocket Component
MBT75 on machine
MBT Single Cartridge
Modular Boring Tool Burnishing Slide

Modular Boring Tools video highlights:

To see the full range of ZX videos please visit YouTube

Cogsdill MBT75 boring and profiling

Cogsdill MBT Bottle Boring tool on HBM

Cogsdill MBT Seat Pocket Machining

We hold standard Modular Boring Tools in stock – other sizes available upon request.

MBT50 side-on

MBT 50

MBT-50-S Modular Boring Tool (single slide)

  Standard end cap
Tool Diameter ⌀50mm
Maximum Stroke 23mm
Standard Capacity
(default configuration)
⌀50mm – ⌀96mm
Maximum Capacity
(extended cartridge
with extended slide)
⌀72mm – ⌀118mm
Work Length 305mm
MBT75 side-on

MBT 75

MBT-75-S Modular Boring Tool (single slide)

Through-style end cap Bottoming-style end cap
Tool Diameter ⌀75mm ⌀75mm
Maximum Stroke 32mm 22mm
Standard Capacity
(default configuration)
⌀75mm – ⌀139mm ⌀75mm – ⌀119mm
Maximum Capacity
(extended cartridge
with extended slide)
⌀150mm – ⌀214mm ⌀150mm – ⌀194mm
Work Length 350mm < ⌀86mm
414mm < ⌀125mm
454mm < ⌀155mm
622mm < ⌀214mm
386mm < ⌀86mm
450mm < ⌀125mm
490mm < ⌀155mm
658mm < ⌀194mm
MBT100 side-on

MBT 100

MBT-100-S Modular Boring Tool (single slide)

Through-style end cap Bottoming-style end cap
Tool Diameter ⌀100mm ⌀100mm
Maximum Stroke 45mm 23mm
Standard Capacity
(default configuration)
⌀100mm – ⌀190mm ⌀100mm – ⌀146mm
Maximum Capacity
(extended cartridge
with extended slide)
⌀184mm – ⌀274mm ⌀184mm – ⌀230mm
Work Length 454mm < ⌀125mm
486mm < ⌀155mm
654mm < ⌀274mm
483mm < ⌀125mm
515mm < ⌀155mm
684mm < ⌀230mm
ZX125 Modular Boring Tool to suit HBM machine

MBT 125

MBT-125-S Modular Boring Tool (single slide)

  Through-style end cap Bottoming-style end cap
Tool Diameter ⌀125mm ⌀125mm
Maximum Stroke 54mm 30mm
Standard Capacity
(default configuration)
⌀125mm – ⌀233mm ⌀125mm – ⌀185mm
Maximum Capacity
(extended cartridge
with extended slide)
⌀212mm – ⌀320mm ⌀212mm – ⌀272mm
Work Length 524mm < ⌀155mm
692mm < ⌀320mm
556mm < ⌀155mm
725mm < ⌀272mm

Comparison Table

Boring tool diagram
TECHNICAL DATA UNITS MBT50 MBT75 MBT100 MBT125
A – Nominal tool diameter  mm 50 75 100 125
B – Tool diameter (first stage) mm N/A 86 N/A N/A
C – Tool diameter (second stage) mm N/A 125 125 N/A
D – Tool diameter (third stage) mm 155 155 155 155
Through type End Cap Radial Stroke mm 23 32 45 54
Bottoming End Cap Radial Stroke mm 12 22 23 30
Total Range of tool with mm 50–118 75–194 100–230 125–272
Slide and Cartridge change
L1 – Maximum working length ⌀A mm 305 350 454 524
L2 – Maximum working length ⌀B mm N/A 414 486 N/A
L3 – Maximum working length ⌀C mm N/A 454 N/A N/A
L4 – Maximum working length ⌀D mm 521.3 622 622 692
L5 – Maximum working length ⌀D (Bottoming style) mm 557 658 684 725
Maximum speed RPM 800 800 800 800
Stoke ratio 2 to 1 2 to 1 2 to 1 2 to 1
Repeatibility accuracy mm 0.003 0.003 0.003 0.003
Backlash mm +/- 0.025 +/- 0.025 +/- 0.025 +/- 0.025
Boring accuracy H7 H7 H7 H7
Max. chip removal on 080M46 steel
Facing D.O.C./mm 3 3 3 3
Boring D.O.C./mm 3 6 7 7
Rapid traverse M/min 100 100 100 100
Roughness Ra 0.8 0.8 0.8 0.8

Special MBT Tools are also available in larger and smaller diameter sizes or equipped with special tool slides operating in bi-directional ways (for roughing and finishing without need to change the cartridge).

Insert Cartridges Diagram

Insert Cartridges and Toolslides

Broad size range: Each tool has a long tool slide stroke that is supplemented by using different cartridges and toolslides to cover an ever wider diameter range. No need to change the toolslide(s) or remove the head from the machine.

Other special cartridge designs available on request: e.g. Burnishing Slide.

Twin-Pocket Insert Cartridge ZX Tools

Twin pocket insert cartridge

Twin-slide ZX-MBT Modular Boring Tools

Twin slide MBT

Roller Burnishing Tool Cartridge

Roller burnishing cartridge

ZX MBT Modular Boring Tools pick-up Station Automated Tooling

MBT pick up station

We’ll design tools specifically for your needs

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