Magnum 1/8" Tapered T3-S HSS Cut Off Blade (COBT18)
Standardizing parting operations for larger workpieces, the Magnum COBT18 1/8" Tapered T3-S Cut Off Blade provides the structural width required for high-stability cuts. The 1/8" (3.18 mm) cutting edge allows for aggressive material removal while maintaining a rigid profile that resists deflection. Featuring the T3-S tapered design, this blade clears the side-walls of the groove automatically as it advances, preventing the common issue of blade seizure in deep parting tasks. Precision-ground from high-speed steel (HSS), it is the go-to tool for parting out carbon steel, cast iron, and tough alloys on heavy-duty manual lathes .
Features
- High-stability parting - 1/8" width provides rigidity for larger diameter workpieces .
- T3-S Taper - Side-wall clearance ensures trouble-free deep grooving and parting .
- Thermal integrity - HSS substrate maintains hardness during high-heat friction cycles.
Specifications
- Thickness: 1/8" (3.18 mm)
- Profile: Tapered T3-S
- Material: HSS
- Supplier Part Number: 363-5035
- KMS Product Code: MAG-COBT18
Common Shop Applications
- Parting off round stock in manual lathes
- Deep grooving operations
- Narrow slotting in non-ferrous and alloy steels
Recommended Shop Add-Ons
- Don't forget: Parting Tool Holder – required for stable cut-off operations.
- Most Machinists also grab: Cutting Fluid – extends tool life and improves finish.
Frequently Asked Questions
Q: Will this fit a standard tool post? A: These blades require a dedicated cut-off/parting tool holder sized for the specific blade height.
Q: Can I use this for deep parting cuts? A: Yes, the tapered design provides side clearance to prevent binding in deep grooves.