Internal Turning Toolholders (Boring Bars)

Steel and carbide-shank boring bars, Ø8–60 mm, top/wedge/lever/screw clamping.

ISO code covers clamping system (A steel bar with internal coolant, C carbide shank, E coolant-through carbide shank, S steel shank), shank diameter, and tool length — e.g. S25T DCLNR-L 12.

Full internal-turning family index — approach angle by code

Code	Approach angle
CKUNR	93°
DCLNR-L	95°
DDUNR-L	93°
DDQNR-L	107.5°
DTFNR-L	91°
DWLNR-L	95°
MVLNR-L	95°
MVPNR-L	117.5°
SCLCR-L	95°
SDQCR-L	107.5°
SDUCR-L	93°
SDWCR	62.5°
STFCR-L	90°
SVJCR	93°
SWUBR-L	93°

CKUNR — representative sizes

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Code No	d	L1	L2	f	D	Insert
S32S CKUNR 16	32	250	60	22	44	KNUX 1604..
S40T CKUNR 16	40	300	70	27	48	KNUX 1604..

DCLNR — representative sizes

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Code No	d	L1	L2	f	D	Insert
S25R DCLNR-L 12	25	200	55	17	32	CNMG 1204..
S32S DCLNR-L 12	32	250	60	22	40	CNMG 1204..
S40T DCLNR-L 12	40	300	65	27	50	CNMG 1204..
S40T DCLNR-L 16	40	300	65	27	50	CNMG 1606..

DDUNR / DDQNR — representative sizes

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Code No	d	L1	L2	f	D	Insert
S20Q DDUNR-L 11	20	180	45	14	27	DNMG 1104..
S32S DDUNR-L 11	32	250	55	22	40	DNMG 1104..
S40T DDUNR-L 15	40	300	65	27	50	DNMG 1506..
S20Q DDQNR-L 11	20	180	45	13	25	DNMG 1104..
S40T DDQNR-L 15	40	300	65	27	50	DNMG 1506..

MVLNR / MVPNR — representative sizes

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Code No	d	L1	L2	f	D	Insert
S25R MVLNR-L 16	25	200	50	17	32	VNMG 1604..
S40T MVLNR-L 16	40	300	60	27	50	VNMG 1604..
S25R MVPNR-L 16	25	200	50	17	32	VNMG 1604..
S40T MVPNR-L 16	40	300	60	27	50	VNMG 1604..