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PARAPARA Drill & Zebra Drill

A Solution to the chipping problem!

Original breaker for chip separation!
Versatile drills with breaker

  • High chip breaking capacity
  • Eliminates chip entanglement and residues
  • No need to rebuild breakers when regrinding

“Amazing Ideas / Facts!”

The GHI Series Reamers for cast iron and steel:

  • Excellent roundness and surface roughness due to the optimized unequal spacing 6 cutting edges.
  • Highly efficient machining at high feed rates contributes to shorter cycle times.
  • Type T for thin-wall and Type R for through-hole are also available.
 

“Amazing Ideas / Facts!”

The Parapara Drill has an original shape of breaker on the flute, resulting in a high chip breaking capacity and eliminating the problems of chip entrapment and residues.
Contributes to the elimination of post inspection processes.
No need to re-add the breaker and thus can easily be reground.

Chip shape

Conventional drills

PARAPARA drill

Elimination of inspection process.

POINT! high chip breaking capacity with the original breaker shape.

Background / Point for Development

Background

  • Problems such as chips winding around, remaining on the workpiece/jig and accumulating on the fixture occur during the drilling process.
    Regular cleaning and additional inspection processes are required.
  • Conventional drills with nicks or breakers do not have sufficient chip breaking ability, and the breaker shape needs to be recreated for regrinding, which poses issues in “versatility”, “chip breaking ability”, and “regrinding”.

Point for Development

  • The PARAPARA Drills solved these problems by adopting an original shape of breaker and developed a drill with both ‘high chip breaking capacity’ and ‘ease of regrinding’.

Example

ToolParapara drill
WorkpieceCylinder head
MaterialAC2C-T6
Tool Diameterø25mm
Cutting Conditions
  • Cutting speed: V=393m/min
  • Cutting feed: f=0.15mm/rev

Chip comparison

Product Specification

Parapara drill

Tool Specification

Process coveredTap prehole, Knock prehole,aluminum general hole
Diameterø8 – 26
Standard conditions
  • Cutting speed: V=50 – 400m/min
  • Cutting feed: f=0.3mm/rev(MAX)
PerformanceIT9
 

Example of applicable work