Sumitomo BSTJOR062 3/8in Shank Right-Hand Boring Bar Toolholder
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The Sumitomo BSTJOR062 (catalog/item# 81909178) is a new, right-hand steel boring bar designed for internal turning and boring operations on CNC and manual lathes. Decoding the MPN: B = boring bar, S = steel shank, T = screw clamp (top clamp) insert clamping, J = insert shape code compatible with STJO-style 35° rhombic (V-shaped) inserts, O = 0° clearance angle, R = right-hand cutting direction, 062 = 3/8 in (0.375 in) shank diameter. The bar accepts VBMT/VBGT-style inserts secured by a Torx T-10 clamping screw, which is included along with a T-10 Torx key wrench. Sumitomo steel boring bars in this series feature a through-coolant-ready body with high-precision ground shank for accurate boring in tight-tolerance ID work on steel, cast iron, and non-ferrous materials.
Product Specifications
| Brand | Sumitomo Electric Carbide |
| MPN | BSTJOR062 |
| Item Number | 81909178 |
| Tool Type | Boring Bar (Internal Turning Toolholder) |
| Shank Material | Steel |
| Clamping Method | Screw Clamp (Top Clamp) |
| Compatible Insert Shape | V (35° Rhombic) — VBMT/VBGT series |
| Insert Clearance Angle | 0° (O-type) |
| Cutting Direction | Right-Hand |
| Shank Diameter | 3/8 in (0.375 in) |
| Insert Screw Wrench Size | T-10 Torx |
| Included Accessories | T-10 Torx key wrench |
| Condition | New |