01K140 - Walter SST+ #40 Cobalt Double-Ended Stub Drill Bit

Maximize Drilling Efficiency with Walter SST+ Double-Ended Stub Drills

The Walter 01K140 #40 SST+ Double-Ended Stub Drill is an industrial-grade cutting tool engineered for professionals who demand longevity and precision in their drilling operations. Designed with a unique double-ended geometry, this bit effectively provides two tools in one. When the primary cutting tip eventually dulls after extensive use, the operator can simply flip the bit in the chuck to utilize a fresh, sharp point. This feature alone significantly reduces tooling costs and downtime associated with bit changes, making it a favorite in high-volume production environments.

Constructed from a state-of-the-art cobalt blend High Speed Steel (HSS), the SST+ series is formulated to withstand the intense heat generated when drilling hard materials. Unlike standard black oxide bits that may anneal and lose their edge under thermal stress, Walter's cobalt blend maintains hardness at higher temperatures. This makes the 01K140 exceptional for drilling through high-tensile alloys, stainless steel, and other tough metals commonly found in aerospace and industrial manufacturing.

The "stub" length design is a critical feature for stability. By shortening the overall flute and shank length, the bit achieves superior rigidity. This reduction in length minimizes the flex and vibration that often leads to breakage in standard jobber-length bits, especially when applying hand pressure or drilling into curved surfaces. The 135-degree split point further enhances performance by ensuring the bit centers itself immediately upon contact, eliminating the need for a center punch and preventing the tool from "walking" across the workpiece. Whether you are drilling out rivets or creating precise holes in thin-gauge sheet metal, the Walter 01K140 delivers clean, round holes with unmatched reliability.

Key Technical Benefits

• Double Economy: Two cutting ends per unit effectively halve your consumable cost per hole.
• Enhanced Rigidity: Short stub profile resists bending and snapping, even under heavy feed pressure.
• Heat Resistance: Cobalt-enriched metallurgy allows for higher cutting speeds in hard metals without premature failure.