Cleveland Golf
Cleveland Golf Jobber Drill 8.5mm Cobalt 135° NAS 907
An 8.5 mm cobalt jobber drill with a 135° split point meets NAS 907 for stainless, tool, alloy steels and titanium
- TypeAngle, Pitch & Slope Locators
- Split-point tip starts holes cleanly in hard alloys
- 135° point angle reduces thrust on stainless and titanium
- Cobalt steel body resists heat during deep drilling
- NAS 907 Type J certified for aerospace-grade work
- 5 mm diameter with 75 mm flute length reaches deep bores
8.5 mm Cobalt Jobber Drill
This 8.5 mm cobalt jobber drill meets NAS 907 Type J requirements for drilling stainless steel, tool steel, alloy steel and titanium. The 135 degree split point reduces walking and starts the cut cleanly on hard materials. It is suited to professional workshops and maintenance teams that need a reliable bit for tough alloys.
Heavy duty shank and flute geometry
The shank diameter matches the 8.5 mm drill diameter so the bit fits directly into standard drill chucks without a reduced shank adapter. A 75.00 mm flute length clears chips from holes up to that depth while the 117.00 mm overall length keeps the tool rigid in deep cuts. Right hand spiral flutes evacuate material efficiently during continuous drilling.
Straw bronze finish for sustained cutting
The straw bronze surface treatment helps the cobalt steel resist heat build up during extended drilling cycles in stainless steel and titanium. The heavy duty grade construction maintains edge integrity when the bit is used repeatedly without frequent re sharpening. Coolant fed operation is not required, though external coolant can further extend tool life in high volume production.
Highlights
- Split-point tip starts holes cleanly in hard alloys
- 135° point angle reduces thrust on stainless and titanium
- Cobalt steel body resists heat during deep drilling
- NAS 907 Type J certified for aerospace-grade work
- 5 mm diameter with 75 mm flute length reaches deep bores
Specifications
| Brand | Cleveland |
|---|---|
| Type | Angle, Pitch & Slope Locators |
Questions about this item
How long can the 135° split point stay sharp when drilling stainless steel?
The cobalt steel construction and heavy-duty grade are designed for extended tool life in stainless steel, tool steel, alloy steel and titanium, though exact drill count depends on cutting speed, feed rate and coolant use.
Does the straw bronze finish reduce heat buildup during continuous drilling?
The straw bronze finish on the cobalt steel helps identify the tool and provides some surface lubricity, but heat control relies mainly on proper cutting parameters and external coolant since the drill is non-coolant-through.
Will the 8.5 mm straight shank fit my drill press chuck directly?
Yes, the 8.50 mm shank diameter matches the drill bit size, so it fits any standard chuck that accepts an 8.5 mm round shank without requiring a reduced-shank adapter.
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