Balance reamer
Excellent deep hole finishing accuracy due to the outstanding balance shape!
“Excellent guiding ability” + “outstanding rotational balance”, ideal for deep hole finishing!
High precision machining with an outstandingly balanced shape and optimal guide arrangement
Prevents workpiece scratches with special coolant design
Amazing facts!
── Introducing ideas and technologies ──
The balance reamer consists of a 4-point guide pad + 1 PCD edge.
This flute design considers the rotational balance of the reamer and suppresses run-out during rotation even when the tool protrusion is long. Guide arrangement considers cutting resistance and realises ‘high precision machining’ in deep hole drilling.
Special coolant hole design ensures lubrication during cutting and prevents workpiece damage.
Excellent roundness
Good!
Roundness
Stable hole diameter
Good!
Diameter variation
This is the point!
High precision due to optimum guide arrangement and outstanding rotational balance
Excellent!
Balance reamer's guide arrangement considers cutting resistance
Balance reamer's flute shape design with rotational balance in mind
Conventional reamer: large runout during rotation
Balance reamer supresses runout during rotation
Stability of bite means stable machining and excellent processing accuracy!
This is the point!
Special coolant design tailored to the workpiece shape prevents workpiece scratches
Excellent!
Special coolant design are supplying coolant to the cutting edge and the guide
Development / product concept
“Current status and challenges”
- In deep hole drilling, the tool protrudes to a long depth, so the rotational balance (misalignment of the centre of gravity) is large, and the centrifugal force during rotation causes the tool to misbehave, resulting in unstable machining accuracy and welding due to insufficient coolant supply to the guide section, resulting in scratches on the workpiece surface.
“Development points”
- The Balance Reamer uses a special flute shape with balanced rotation to suppress run-out during rotation and an optimised guide pad arrangement to stabilise the machining accuracy of deep hole drilling.
Furthermore, by supplying coolant to the entire guide, the lubricity is improved, which prevents welding to the guide and scratches on the workpiece surface.
Machining example
deep hole
Tools used
Balance reamer
Machining work
Valve body spool hole
Work material
JIS ADC12 / ENAC-AlS11Cu2(Fe)
Tool diameter
ø12 mm
Cutting conditions
Cutting speed: Vc = 280 m/min
Feed: f = 0.07 mm/rev
Machining allowance
ø0.25 mm
Required accuracy
Cylindricity
Hole diameter variation
Product specification
- Tool specification
Tool name
Balance reamer
Target process
Setting diameter
ø8 mm ~
Standard conditions
Cutting speed: Vc = 100~300 m/min
Feed: f = 0.05~0.1 mm/rev
Machining accuracy
Hole tolerance IT7 grade
- Applicable workpiece shape
Cylinder head
