Large Diameter Bores? You may already own what you need.

Criterion’s large diameter boring system increased the production of one of our customers in Wisconsin from one part per hour to fourteen parts per hour! This production increase reduced the boring machining cost by 93% of what it had been. Criterion’s modular boring system will PAID FOR ITSELF in 1 week!

The LCB1.5 modular boring system is designed around Criterion’s standard 1-1/2” diameter Cri-Bore modular boring head, a series of extender bars  and a tool holder. 

By using Criterion modular boring heads, that you may already have in your shop, you can use the extender bars to machine larger bores and even install the heads 180 degree around and machine the OD of a boss.


Did you catch that? That means that the LCB1.5 boring heads can also be positioned so they turn a boss on a part–eliminating the need for additional set-ups on other machines.


The use of counterweights allows the system to operate at the recommend SFPM for the carbide inserts. Doing this extends the carbide life—as well as decreases the production times required for carbide boring.

So the bottom line is this: If you have some of our CB1.5 boring heads in your shop, you only need to purchase our extender bars in many cases.


Go out on your floor and take a look around and see if you've got some of our modular boring heads already. Here's what to look for:

CODE NO.	TOOL NO.	A MAX. BORE	B MIN. BORE	C OVERALL LENGTH	D BAR DIA.	INSERT I.C.	INSERT STYLE	THREAD
25337	CB1.5-BD-TP	2.700	1.585	2.480	1.500"	.375	TPGT/TPGW	7/8-20
25341	CB1.5-BD-CP/DI	2.700	1.585	2.480	1.500"	.375	CC or CP	7/8-20

Download our complete LCB1.5 Boring System information in PDF format.