Cleveland Twist Drill Q Cobalt Drills

Performance Tests Vs. Competing Drills

We've tested the Series 2075 Q Cobalt drill (uncoated) against its closest competitors. In alloy steel and stainless steel, the Q Cobalt drilled more holes than its competitors with more reliability and accuracy. The drills also showed superior hole size tolerance in high volume production runs, giving more consistency in the finished product.

Test In Alloy Steel (1) In Stainless Steel (2)

Number of Holes

A test for toughness and durability under typical production conditions

Q Cobalt Drills produced

17% more holes than
Competitor A
3.5% more holes than
Competitor B

Q Cobalt Drills produced

40% more holes than
Competitor A
37% more holes than
Competitor B

Consistent Reliability

A test for performance consistency in the number of holes produced,
drill-to-drill

Q Cobalt Drills were

15% better than
Competitor A
45% better than
Competitor B

Q Cobalt Drills produced

57% better than
Competitor A
53% better than
Competitor B

Hole Size Accuracy

A test for consistency
in hole size tolerance,
hole-to-hole

Q Cobalt Drills were

equal to Competitor A
.0015" more accurate than Competitor B

Q Cobalt Drills were

equal to Competitor A
.0025" more accurate than Competitor B

1 Test in alloy steel workpiece:
Material: 4340 alloy steel
Hole depth: 0.938" (blind)
SFM: 60
RPM: 917
IPR: .004"
IPM: 3.7
2 Test in stainless steel workpiece:
Material: 304 stainless steel
Hole depth: 0.938" (blind)
SFM: 50
RPM: 764
IPR: .005"
IPM: 3.8

 

Chip Control

Chips are controlled more easily than those produced from competitors' tools. The parabolic design's wider flute spacing disperses chips away from the cutting edge more rapidly. This results in tighter, more manageable chips, reduces chip packing, prevents scratching of the work surface and increases volume of coolant flow. There is more uptime and less scrap because less time is required to remove chips and refinish the workpiece. Surface finish requirements are met more consistently.

 

Chip control in 4340 alloy steel

Left to right, Q Cobalt 2075, Competitor A, Competitor B. In 4340 alloy steel, the 2075 produced the smallest chip for better chip evacuation.

 

Chip control in 304 stainless steel

Left to right, Q Cobalt 2075, Competitor A, Competitor B. The 2075 produced a flatter, more controllable chip in 304 stainless steel. The longer chips are normal in stainless.