<BORING SYSTEM>FIRSTCUT [Small-hole Boring Tool]
NEWPrecision Tuning Small-holeBoring Tool
A Higher Level of Stability
A Higher Level of Stability

Adjustment dialHigh feeding precision

Auxiliary ring
Eliminates dimension matchingerrors.

ColletAllows the operator to change thediameter of the boring bar handle.

Lock bolt
Can be locked with light force.

Throwaway jig borer tool
The tip is mounted so as to minimize cutting resistance.
Ensures that hole diameters will not diverge.

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DIMENSIONS

BT P.72 HSK P.135 ST P.150

DIMENSIONSJIG BORER TOOLS, COLLET, INSERTS P.73, 136

DIMENSIONSEXTENSION, REDUCTION P.74, 137

High Rigidity Pre-balanced Design
Square slide, through feed screw, steel balls on bothsides of feed screw, feed screw fixed with double
screws, and backlash-adjusted internal thread: very
robust structure without any gaps.

Slide lock bolt

Square slide
Steel ball

The feed screw is polished at high precision and thus
moves smoothly, allowing for accurate dimensional
adjustment with the dial scale (backlash-free).
The dial is calibrated to 0.01 mm for FIC2NJ, 0.005 mm
for FIC1NJ.

O-ringBacklashadjustment bolt

FIC2NJ

With auxiliary ring
An auxiliary ring is placed on the outer circumference ofthe dial. Rotating this manually makes dimensional
adjustment easier and eliminates reading errors.

Standard line
Auxiliary ringThrowaway Boring Tool
We utilize our own proprietary design for our throwaway
boring tools. These tools are designed to minimize
cutting resistance and fully utilize the tip features, inorder to avoid making trumpet-shaped machined holes.
ISO tips can be used. The shank has a coolant hole thatallows the reliable supply of through coolant to the bladeedge.
The heads can be used with through coolant systems,
provided that you use our dedicated throwaway tools.

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<BORING SYSTEM>FIRSTCUT [Machining diameter Ф25-Ф73]
NEW

Adjustable Boring for Ultra-precision Finish
Adjustable Boring System for Ultra-precision Finish
Achieved by High-precision Feeding

Maintenance HoleThe body has an opening for cleaning and filling.
Air for cleaning is injected and oil is supplied
via the maintenance hole, ensuring continuous
stable movement of the slide.

Lock bolt
Stable locking withinserted locking pad

The slight clearance between
the slide and the body hole isproperly adjusted.

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DIMENSIONS

BT P.71 HSK P.134 ST P.150

DIMENSIONSTHROWAWAY SQUARE SHANK TOOLS, INSERTS P.73, 136

DIMENSIONSEXTENSION, REDUCTION P.74, 137

Eliminating the Staggering of Blade Edge Dimensions

Reinforced Machining Stability

The blade edge does not stagger evenwhen the slide is locked.

A guide groove on the body ensures
stable machining.

The slight clearance between the slide and the body hole isproperly adjusted. In addition, a locking pad is placed betweenthe lock bolt and slide, preventing torsional action on the slide attightening. Moreover, the lock is set in a slanting direction so as
to deal with both the main and feeding force components of thecutting resistance force. These measures thus eliminate staggering of the blade edge when locking the slide.

In order for the body to securely absorb thecutting resistance force, it is equipped witha polished guide groove to keep the blade
fixed, thus absorbing the component force
and improving machining stability.

Slide

Body

Locking padSlide

Lock bolt

Lock boltTightening
direction

Coolant hole
Main cutting
resistanceforce component
Cutting resistancefeeding
force component

BladeBlade
Guide groove

Body

Tip

Backlash-free Dial Calibrated to 0.01 dia.
Direct reading accuracy of 0.01 dia.

<Standard>

The dial is very easy to read because a gear is incorporated to widen the calibration pitch.
In addition, its structure eliminates backlash, thereby improving its operability.

High Feeding Precision
Accurate feeding is maintained via the high-precision feed screw.
The feed screw, an essential point of feeding precision, has been polished with highprecision after heat treatment.
For this reason, it will maintain a highly accurate feed, allowing the user to reliably correct
dimensions on the machine.

Support for through coolant
Coolant is reliably supplied to the blade edge.
Through a steady supply of coolant, chippings are easily
expelled and both the blade edge and machined area ofworkpieces can be prevented from heating up. This has thefollowing benefits:❶ Improved tip lifetime❷ Higher cutting speed/cutting feed
❸ Improved surface roughness of workpieces❹ Improved dimensional accuracy of workpieces
As a result, you can expect accurate machining at highefficiency.

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<BORING SYSTEM>FIRSTCUT [Machining diameter Φ70-Φ360]
NEW

Adjustable Boring for Ultra-precision Finish
Adjustable Boring System for Ultra-precision Finish
Achieved by High-precision Feeding

Blade edge/tip
60° Triangular tip
80° Rhomboid tip

Coolant hole/nozzle
Allows reliable feeding
to the blade edge.

Radial adjustment screw
Direct reading 0.01 dia.

Slide
Dovetail structureHigh-rigidity clamp holding type

25Tool/Blade90° square shank tool

DIMENSIONS

BT P.71 HSK P.134 ST P.150

DIMENSIONSTHROWAWAY SQUARE SHANK TOOLS, INSERTS P.73, 136

DIMENSIONSEXTENSION, REDUCTION P.74, 137

High-rigidity clamp holding structure
Holding clamp bolt

The body and slide part are integrated with a hand-finisheddovetail that is aligned to the actual workpiece and held fixedwith clamp bolts. Since it is constrained in two places (thetaper area of the dovetail and the bottom surface) a highly rigid
assembly is ensured.

Use of Precision Screws

Two-face
constraint

FIC150N, FIC220N, FIC290N use polished worms/worm wheels,
allowing fine-tuning with a precision of 0.01 dia. by direct reading.

Wide Variety of Blade Edges
We adopt 90°square shank tool, and when choose L-type squareshank tool, then back boring is available.
We adopt ISO insert chip so according to the work you can selectfrom chips made by any tool manufacture.
※L-type square shank tool for back boring and back cover to bequoted separately.
Square shank tool type L

Back cover (option)

FIC150N、220N、290N head
Back boring machining

Wide Machining Range
By using square shank tools, wider machining range that cannot
normally be achieved with a normal boring head can be obtained
not only by moving slide but by projecting square shank tools.
Moreover, well balanced machining can be achieved by mainly
adjusting the projection of shank tool and then decreasing theslide opening for the tuning.

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