Indexable Boring Bar Heads for CNC Shops

Boring heads for anti-vibration boring bars. The head screws onto the front of the bar, carries the insert and sets the minimum bore — so one bar can take a roughing head, a finishing head and a back boring head. Prices online, no quote needed.

Match the coupling size to the bar: 20 mm heads for the 20 mm bar, 25 mm for the 1" bar, 32 mm for the 32 mm bar, 40 mm for the 2" bars. All heads take standard CCMT, DCMT, DNMG or VNMG inserts, sold separately.

20 mm 25 mm · 1" bars 32 mm 40 mm · 2" bars Anti-Vibration Boring Bars →

Total found: 5

Only new

Coupling Size, mm: 40

Part #, name	Holder Style	Insert Size	Coupling Size, mm	excl. taxes
D40-SCLCR12Made to order CCMT 43 Boring Head for Anti-Vibration Boring Bars, 40 mm Dia., Right Hand	Standard Boring	CCMT 43	40	CA$252.22
D40-SDUCR11Made to order DCMT 32.5 Boring Head for Anti-Vibration Boring Bars, 40 mm Dia., Right Hand	Standard Boring	DCMT 32.5	40	CA$252.22
D40-DDUNR1504Made to order DNMG 43 Boring Head for Anti-Vibration Boring Bars, 40 mm Dia., Right Hand	Standard Boring	DNMG 43	40	CA$280.22
D40-DVUNR16Made to order VNMG 33 Boring Head for Anti-Vibration Boring Bars, 40 mm Dia., Right Hand	Standard Boring	VNMG 33	40	CA$280.22
D40-SDZCR11Made to order DCMT 32.5 Back Boring Head for Anti-Vibration Boring Bars, 40 mm Dia., Right Hand	Back Boring	DCMT 32.5	40	CA$280.22

How a boring head fits the bar

An anti-vibration boring bar is sold as a body. The cutting end is a separate head that screws onto a serrated coupling at the front of the bar, carries the insert and sets the minimum bore. Coolant runs through the bar and out through the head. Changing the head takes a few minutes and turns one bar into a roughing tool, a finishing tool or a back boring tool.

These are heads for lathe boring bars. They are not the adjustable offset boring heads used on milling machines.

The coupling size on the head has to match the bar. On bars larger than 40 mm, including the 2" bars, the 40 mm coupling sits off-centre, so the insert reaches past the bar diameter.

Off-Centre 40 mm Head Coupling on a 2 inch Anti-Vibration Boring Bar

Which head for which bar

Bar diameter	Coupling	Heads	Minimum bore
20 mm (0.787")	20 mm	CCMT 32.5 · DCMT 32.5 right and left hand	0.945" (24 mm)
1"	25 mm	CCMT 32.5 · DCMT 32.5 · DCMT 21.5 back boring	1.181" (30 mm), back boring 1.260" (32 mm)
32 mm (1.26")	32 mm	CCMT 32.5 · DCMT 32.5 · DCMT 32.5 back boring	1.575" (40 mm)
2"	40 mm	CCMT 43 · DCMT 32.5 · DNMG 43 · VNMG 33 · DCMT 32.5 back boring	2.362" (60 mm), VNMG 2.480" (63 mm)

Which head for the job

CCMT, 95° — the general boring head. The 80° corner is strong, and the 95° lead lets the same head face the bottom of a blind bore.
DCMT, 93° — light cuts, finishing and profiling. The 55° point follows a shape — a step, a radius, a chamfer — where an 80° corner would rub.
DNMG, 93° — roughing on the 2" bars. A negative insert under a top clamp takes heavier cuts, and its double-sided design gives twice the edges per insert.
VNMG, 93° — profiling into tight contours with a 35° point. It needs a slightly larger bore than the other 40 mm heads.
Back boring — cuts on the pull-out stroke, to face the back of a shoulder or bore a recess behind a narrower entry, without turning the part around.

A smaller nose radius pushes the bar less sideways, so at full reach a 0.016" radius is safer than 0.031".

Inserts

Every head takes a standard ISO insert, sold separately — the same CCMT, DCMT, DNMG and VNMG sizes many OD turning tools use, so one insert stock covers both. Find them in turning inserts.

Buying boring heads from CNCmarket

Every EASYCUT boring head has its price on the product page — order online, no quote and no waiting for a sales rep. If you need an insert style or a hand that is not listed, send us the bar, the bore and the material.

How a boring head fits the bar

These are heads for lathe boring bars. They are not the adjustable offset boring heads used on milling machines.

The coupling size on the head has to match the bar. On bars larger than 40 mm, including the 2" bars, the 40 mm coupling sits off-centre, so the insert reaches past the bar diameter.

Off-Centre 40 mm Head Coupling on a 2 inch Anti-Vibration Boring Bar

Which head for which bar

Bar diameter

Coupling

Heads

Minimum bore

20 mm (0.787")

20 mm

CCMT 32.5 · DCMT 32.5 right and left hand

0.945" (24 mm)

25 mm

CCMT 32.5 · DCMT 32.5 · DCMT 21.5 back boring

1.181" (30 mm), back boring 1.260" (32 mm)

32 mm (1.26")

32 mm

CCMT 32.5 · DCMT 32.5 · DCMT 32.5 back boring

1.575" (40 mm)

40 mm

CCMT 43 · DCMT 32.5 · DNMG 43 · VNMG 33 · DCMT 32.5 back boring

2.362" (60 mm), VNMG 2.480" (63 mm)

Which head for the job

CCMT, 95° — the general boring head. The 80° corner is strong, and the 95° lead lets the same head face the bottom of a blind bore.

DCMT, 93° — light cuts, finishing and profiling. The 55° point follows a shape — a step, a radius, a chamfer — where an 80° corner would rub.

DNMG, 93° — roughing on the 2" bars. A negative insert under a top clamp takes heavier cuts, and its double-sided design gives twice the edges per insert.

VNMG, 93° — profiling into tight contours with a 35° point. It needs a slightly larger bore than the other 40 mm heads.

Back boring — cuts on the pull-out stroke, to face the back of a shoulder or bore a recess behind a narrower entry, without turning the part around.

A smaller nose radius pushes the bar less sideways, so at full reach a 0.016" radius is safer than 0.031".