ZX Modular Boring Tools

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.

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.

Modular Design. Increased Functionality.

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

Modular Boring Tools video highlights:

To see the full range of ZX videos please visit

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.

MBT 50

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

MBT-50-S		Through end cap	Bottoming end cap
Tool Diameter		⌀ 50 mm	⌀ 50 mm
Maximum Stroke		23 mm	18 mm
Standard Capacity (default configuration)		⌀ 50–96 mm	⌀ 68–104 mm
Maximum Capacity (extended cartridge/slide)		⌀ 72–118 mm	⌀ 76–112 mm
Work Length	L1 ⌀ A	315 mm : ⌀ 50 mm	340 mm : ⌀ 68 mm
Work Length	L4 ⌀ D	531 mm : ⌀ 155 mm	557 mm : ⌀ 155 mm

Capacity Diagram » | Compare the tools »

MBT 75

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

MBT-75-S		Through end cap	Bottoming end cap
Tool Diameter		⌀ 75 mm	⌀ 75 mm
Maximum Stroke		32 mm	22 mm
Standard Capacity (default configuration)		⌀ 75–139 mm	⌀ 75–119 mm
Maximum Capacity (extended cartridge/slide)		⌀ 150–214 mm	⌀ 150–194 mm
Work Length	L1 ⌀ A	350 mm : ⌀ 75 mm	386 mm : ⌀ 75 mm
	L2 ⌀ B	414 mm : ⌀ 86 mm	450 mm : ⌀ 86 mm
	L3 ⌀ C	454 mm : ⌀ 125 mm	490 mm : ⌀ 125 mm
	L4 ⌀ D	622 mm : ⌀ 155 mm	658 mm : ⌀ 155 mm

Capacity Diagram » | Compare the tools »

MBT 100

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

MBT-100-S		Through end cap	Bottoming end cap
Tool Diameter		⌀ 100 mm	⌀ 75 mm
Maximum Stroke		45 mm	23 mm
Standard Capacity (default configuration)		⌀ 100–190 mm	⌀ 100–146 mm
Maximum Capacity (extended cartridge/slide)		⌀ 184–274 mm	⌀ 184–230 mm
Work Length	L1 ⌀ A	454 mm : ⌀ 100 mm	483 mm : ⌀ 100 mm
	L2 ⌀ B	486 mm : ⌀ 125 mm	515 mm : ⌀ 125 mm
	L4 ⌀ D	654 mm : ⌀ 155 mm	684 mm : ⌀ 155 mm

Capacity Diagram » | Compare the tools »

ZX125 Modular Boring Tool to suit HBM machine

MBT 125

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

MBT-125-S		Through end cap	Bottoming end cap
Tool Diameter		⌀ 125 mm	⌀ 125 mm
Maximum Stroke		54 mm	30 mm
Standard Capacity (default configuration)		⌀ 125–233 mm	⌀ 125–185 mm
Maximum Capacity (extended cartridge/slide)		⌀ 212–320 mm	⌀ 212–272 mm
Work Length	L1 ⌀ A	524 mm : ⌀ 125 mm	556 mm : ⌀ 125 mm
Work Length	L4 ⌀ D	692 mm : ⌀ 155 mm	725 mm : ⌀ 155 mm

Capacity Diagram » | Compare the tools »

MBT Comparison Table

TECHNICAL DATA	UNITS	MBT50		MBT75		MBT100		MBT125
⌀ A : Nominal Tool Diameter	mm	49.8		73.0		100.0		123.8
⌀ B : Tool Diameter (first stage)	mm	–		86		–		–
⌀ C : Tool Diameter (second stage)	mm	–		125		125		–
⌀ D : Tool Diameter (third stage)	mm	155		155		155		155
RS : Max. Radial Stroke (through / bottoming)	mm	23	18	32	22	45	23	54	30
⌀ X : Min. Standard Capacity (through / bottoming)	mm	50	68	75	75	100	100	125	125
⌀ Y (through) / ⌀ Z (bottom) : Max. Extended Range *	mm	118 *	112 *	214 *	194 *	274 *	230 *	320 *	272 *
CL : Cartridge Length	mm	35.0		44.4		50.8		63.5
L1 (through) / L5 (bottom) : Max. Working Length ⌀ A	mm	315	340	350	386	454	483	524	556
L2 (through) / L6 (bottom) : Max. Working Length ⌀ B	mm	–	–	414	450	486	515	–	–
L3 (through) / L7 (bottom) : Max. Working Length ⌀ C	mm	–	–	454	490	–	–	–	–
L4 (through) / L8 (bottom) : Max. Working Length ⌀ D	mm	521	527	622	658	622	684	692	725
AL : Adapter Length 4-pin (standard) / 2-pin (option)	mm	95.3	104.3	95.3	104.3	95.3	104.3	95.3	104.3
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).
* Maximum Range requires Slide and Cartridge changes (see Insert charts).

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

Twin slide MBT

Roller burnishing cartridge

ZX MBT Modular Boring Tools pick-up Station Automated Tooling

MBT pick up station

Inserts Comparison Table

TECHNICAL DATA	MBT50		MBT75		MBT100		MBT125
CL : Cartridge Length	35.0		44.4		50.8		63.5
RS : Max. Radial Stroke (through end)	23		32		45		54
RS : Max. Radial Stroke (bottoming end)	18		22		23		30

Through End Maximum Range (⌀ X–⌀ Y)
SR : TOOLSLIDE SLIDE RADIUS	CR : CARTRIDGE CUT RADIUS
SR : TOOLSLIDE SLIDE RADIUS	16.5 mm	21 mm	23 mm	35.5 mm	23 mm	35.5 mm	27 mm	44 mm
8.5 mm	50–96 mm	59–105 mm
15.0 mm	63–109 mm	72–118 mm
14.5 mm			75–139 mm	100–164 mm
27.0 mm			100–164 mm	125–189 mm	100–190 mm	125–215 mm
39.5 mm			125–189 mm	150–214 mm	125–215 mm	150–240 mm
56.5 mm					159–249 mm	184–274 mm
35.5 mm							125–233 mm	159–267 mm
52.5 mm							159–267 mm	193–301 mm
62.0 mm							178–286 mm	212–320 mm

Bottoming End Maximum Range (⌀ X–⌀ Z)
SR : TOOLSLIDE SLIDE RADIUS	CR : CARTRIDGE CUT RADIUS
SR : TOOLSLIDE SLIDE RADIUS	16.5 mm	21 mm	23 mm	35.5 mm	23 mm	35.5 mm	27 mm	44 mm
15.0 mm	68–104 mm	76–112 mm
14.5 mm			75–119 mm	100–144 mm
27.0 mm			100–164 mm	125–189 mm	100–146 mm	125–171 mm
39.5 mm			125–189 mm	150–214 mm	125–171 mm	150–196 mm
56.5 mm					159–205 mm	184–230 mm
35.5 mm							125–185 mm	159–219 mm
52.5 mm							159–219 mm	193–253 mm
62.0 mm							178–238 mm	212–272 mm