Rigibore's wide range of boring units for roughing, semi-finishing and fine finishing is amongst the widest in the marketplace. It is directly interchangable with a number of other brands of boring unit such as Microbore, Sandvik, Kennametal, Valenite and Stellram.

Rigibore units offer a number of features and benefits that entail superior rigidity and repeatability of cut.

Note: because of the assembly tolerances, it is recommended that units, if damaged, are returned to Rigibore for assessment/repair.

Rigibore MBX Unit

Rigibore MBX boring units are precision units for mounting into standard or special boring tools.

Standard 'R' Unit

The standard unit, used for roughing and semi-finishing operations, it is mounted directly into a tool hole in the bar or holder and has a minimum bore size of 15.87mm / .625".

Top Adjusting 'TR' Unit

The top adjusting 'TR' unit, used for light roughing and fine finishing operations, it is mounted directly into a tool hole in the bar or holder.


Only used for finishing operations, this top adjusting unit is bush mounted, and is designed to fit both new and existing holes in bars or holders.

Top Adjusting MBU Unit

These fine boring units are designed for building into boring bars which are dedicated to (or about) a specific bore size.

Smartbore Bush Units

Smartbore technology applied to bush units, allowing micron accurate digital adjustment, and critical tolerances to be made without compromise.

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