Sutton 4mm Cobalt Jobber Drill Bit - Metric - Colour Temp

Sutton Tools Heavy Duty Cobalt Jobber Drills are industrial quality for drilling materials that have high hardness and tensile strength such as cast iron, bronze, hardened steel & stainless steel. These drill bits feature a thick core for increased rigidity in hard materials. Available through AIMS Industrial Supplies, these tools meet the exacting demands of Australian tradespeople, engineers, and maintenance teams who need quality cutting tools they can depend on shift after shift.

Where this tool is used

• Thick Core - For increased rigidity in hard materials.
• Colour Tempered Surface Finish - Enables identification of cobalt tool material.
• General purpose drilling operations in ferrous and non-ferrous metals, plastics and composite materials.

Key specifications

Selecting the right option

Manufactured from HSS Co, this range offers an excellent balance of toughness and wear resistance suited to general-purpose production and maintenance work. The Colour Temp surface treatment reduces friction, improves chip evacuation and extends service life compared with uncoated tools — particularly valuable in harder or abrasive materials. The 135°° point angle is optimised for the materials and applications this range is designed for. Match the drill diameter to your required hole size and ensure adequate feed rate and coolant for best results. Maximum cutting depth is rated at 5XD — keep within this limit to maintain hole quality and avoid overloading the tool. If you're unsure which size or specification best suits your application, the AIMS team is ready to help — contact us for technical support or to arrange a sample.