China Tungsten Solid Carbide Round Bars Supplier & Suppliers

Batch stability begins at the powder stage. We control raw tungsten grain reduction directly in-house, preventing mixed-scrap contamination. Each sintered batch undergoes magnetic saturation (Cobalt-magnetization) and coercive force (Hc) testing to guarantee that the carbon balance stays strictly within the non-eta phase zone, ensuring uniform tool grinding behavior.

Our centerless grinding lines provide tolerances ranging from standard ISO h6 (0 / -0.008mm for Ø6-10mm) to ultra-precision ISO h5 (0 / -0.005mm) or customer-specified -0.005mm limits. Ground surface roughness is held to Ra ≤ 0.1 μm (mirror ground upon request) with circularity runout verified at under 0.002mm.

Yes. We produce both single straight axial coolant bars and twin helical coolant hole bars with standard helix angles of 30° and 40°, or custom pitches tailored to your drill flute drawing. Precision extrusion dies guarantee accurate pitch spacing and central screw alignment throughout the entire rod length.

For standard inventory sizes (such as unground 330mm blanks and popular h6 ground diameters from Ø3.0 to Ø20.0mm), our Minimum Order Quantity is 1 piece to facilitate testing. Standard custom production runs ship within 7 to 25 days depending on chamfering, step grinding, or Weldon milling requirements.

Every precision ground bar is coated in protective corrosion-inhibiting oil and packaged in individual high-impact plastic tubes or compartmentalized shock-absorbent trays. Cartons are sealed with vapor-barrier foil and crated in fumigated solid wooden boxes, preventing mechanical impact or rust contamination during maritime shipping.