Package Price:
$91.60/10 per eachUsually ships within 3-5 business days
The Walter 01B507 SST+ Jobber Drill Bit (Size #7) represents the pinnacle of drilling technology for industrial maintenance and fabrication. Engineered to address the common failure points of standard high-speed steel bits, the SST+ series utilizes a proprietary cobalt blend that maintains hardness at high temperatures. This is critical when drilling materials with low thermal conductivity, such as stainless steel, where heat localization can rapidly degrade the cutting edge. The #7 size, with a diameter of 0.2010 inches, is the standard tap drill size for 1/4"-20 threads, making this a consumable staple in any machine shop or maintenance department.
Beyond the metallurgy, the geometry of the 01B507 is designed for efficiency. The bit features a "High Flow" flute design which significantly improves the rate of chip evacuation. In deep hole drilling, chip packing is a primary cause of bit breakage and poor surface finish; the SST+ geometry ensures that swarf is ejected rapidly, keeping the cutting zone cooler. Furthermore, the body of the drill is back-tapered. This subtle reduction in diameter behind the cutting head prevents the shank from rubbing against the hole walls, reducing friction torque and eliminating the risk of the bit binding or seizing in the material.
The surface of the bit is treated with an exclusive bronze SST coating. Unlike standard black oxide, this treatment serves a tribological function, acting as a solid lubricant to further mitigate friction and heat generation. The tip utilizes Walter's "Speed Tip" design, a self-centering geometry that eliminates the need for center punching. This allows for immediate engagement with the workpiece, even on round or curved surfaces, ensuring precise hole location and reducing cycle times in production environments. For professionals requiring reliable, high-performance tooling that minimizes downtime and maximizes throughput, the Walter SST+ #7 is the superior choice.
| Additional Information |
|---|
| Packaging Description:10 per each, 10 per pack |
| Brand:Walter |
| Item:Drill Bit |
| Drill Size:#7 |
| Decimal Equivalent:0.2010" |
| Material:Cobalt Blend |
| Point Type:Speed Tip (Self-Centering) |
| Flute Design:High Flow |
| Application:Mild Steel, Non-Ferrous Metal, Stainless Steel |
| Tap Drill Size For:1/4"-20 |
