Manmaru Z reamer
Stable & excellent finishing accuracy
even in intermittent cutting!
- ‘Excellent guiding properties’ + ‘PCD cutting edge’ for
high precision and intermittent holes
- Excellent machining accuracy due to all-round guide + single PCD edge
- Improved welding resistance by DLC coating
“Amazing Ideas / Facts!”
The True Circle (manmaru) reamer consists of an all-round guide + a single PCD edge.
The all-round guide provides excellent guiding performance even in intermittent cutting and enables stable machining.
In addition, the single PCD edge + DLC coating improves resistance against welding and results in ‘high-precision machining’.
Excellent RoundnessGood !
Stable Hole DiameterGood !
Improved Welding Resistance with DLC CoatingGood !
POINT!
High guiding properties provides high accuracy.Excellent !
Background / Point for Development
Background
- When there are side holes or grooves in the machined hole, intermittent cutting occurs, and the hole diameter and roundness are not stable with conventional two-edge PCD reamers, making high-precision machining difficult.
Point for Development
- All-round guide + single PCD edge prevents the tool from making undesired behaviour during machining, which results in an excellent machining accuracy even in intermittent cutting.
- DLC coating prevents aluminium welding, which was a concern with all-round guides.
ExampleIntermittent Hole
| Tool | Manmaru Z reamer |
|---|---|
| Workpiece | Cylinder head (Lifter hole) |
| Material | AC2C-T6 |
| Tool Diameter | ø31mm |
| Cutting Conditions |
|
| Machining allowance |
ø0.3 |
| Required accuracy |  |
Lifter Hole
Roundness
Hole Diameter
Product Specification
Tool Specification
| Process covered |
Valve seat, guide press-fit holes, spool holes, lifter holes and aluminum high-precision holes |
|---|---|
| Diameter | ø5 - |
| Standard conditions |
|
| Performance | IT7 |
Applicable work example
