炭化タングステンの球グレード：
| 素材/PCT% | YG6(x) | YG8 | YG13 | YG20 | YN6 | YN9 | YN12 |
| タングステン カーバイド |
94% | 92% | 87% | 80% | 94% | 91% | 88% |
| CO | 6% | 8% | 13% | 20% | |||
| ニー | 6% | 9% | 12% |
炭化タングステンの球のサイズ：
| MM | インチ | MM | インチ | MM | インチ |
| 0.5 | 5 | 11.113 | 7/16 | ||
| 0.6 | 5.159 | 13/64 | 12 | ||
| 0.794 | 1/32 | 5.5 | 12.303 | 31/64 | |
| 0.8 | 5.953 | 15/64 | 12.7 | 1/2 | |
| 1 | 6 | 13.494 | 17/32 | ||
| 1.588 | 1/16 | 6.35 | 1/4 | 14.288 | 9/16 |
| 2 | 6.5 | 15 | |||
| 2.381 | 3/32 | 6.747 | 17/64 | 16 | |
| 2.5 | 7 | 16.669 | 21/32 | ||
| 2.778 | 7/64 | 7.144 | 9/32 | 18.256 | 23/32 |
| 3 | 7.5 | 19.844 | 25/32 | ||
| 3.175 | 1/8 | 7.938 | 5/16 | 20.638 | 13/16 |
| 3.5 | 8 | 22.225 | 7/8 | ||
| 3.969 | 5/32 | 8.5 | 28.575 | 11/8 | |
| 4 | 9 | 30.162 | 13/16 | ||
| 4.5 | 9.525 | 3/8 | |||
| 4.763 | 3/16 | 10 |
弊社では、お客様のご要望のサイズに合わせて超硬球を製造することができます。
超硬球の公差：
| 精度 グレード |
バリエーション | スフェリカル | 表面 | 寛容 | ロットバリエーション |
| G3 | 0.0762μm | 0.0762μm | 0.0127μm | ±0.762μm | 0.127μm |
| (0.000003″) | (0.000003″) | (0.0000005″) | (±0.0003″) | (0.000003 “) | |
| G5 | 0.127μm | 0.127μm | 0.02μm | ±1.27μm | 0.254μm |
| (0.000005″) | (0.000005") | (0.0000008″) | (±0.0005″) | (0.00001″) | |
| G10 | 0.254μm | 0.254μm | 0.0254μm | ±2.54μm | 0.508μm |
| (0. 00001″) | (0.00001″) | (0.000001″) | (±0.0001″) | (0.00002″) | |
| G15 | 0.381μm | 0.381μm | 0.0254μm | ±2.54μm | 0.0762μm |
| (0.000015″) | (0.000015″) | (0.000001″) | (±0.0001″) | (0.00003″) | |
| G16 | 0.4064μm | 0.4064μm | 0.0254μm | ±2.54μm | 0.8128μm |
| (0.000016″) | (0.000016″) | (0.000001″) | (±0.0001″) | (0.000032 “) | |
| G24 | 0.6096μm | 0.6096μm | 0.0508μm | ±2.54μm | 1.2192μm |
| (0.000024″) | (0.000024″) | (0.000002″) | (±0.00001″) | (0.000048″) | |
| G25 | 0.635μm | 0.635μm | 0.0762μm | ±2.54μm | 1.27μm |
| (0.000025″) | (0. 000025″) | (0.000003″) | (±0.0001″) | (0.00005″) | |
| G48 | 1.2192μm | 1.2192μm | 0.0762μm | ±0.508μm | 2.4384μm |
| (0.000048″) | (0.000048″) | (0.000003″) | (±0.0002″) | (0.000096″) | |
| G50 | 1.27μm | 1.27μm | 0.0762μm | ±7.62μm | 2.54μm |
| (0.00005") | (0.00005″) | (0.000003") | (±0.0003″) | (0.0001 “) |
超硬球の用途
1.重要なベアリング：高度なCNC工作機械や航空宇宙機器など、高速、高荷重、腐食環境で動作する精密機械に使用されます。
2.オイルバルブ：石油掘削用ポンプに使用され、莫大な圧力と砂や砂利による磨耗に耐える。
3.化学用ポンプとバルブ：研磨性のスラリーや化学液体を移送するポンプやバルブで、鋼球よりもはるかに耐久性がある。
4.ペン先ビーズ：高級ボールペンの先端にある小さなボールが、何十万字書いても滑らかな書き味を実現する。
5.精密測定：精密測定機器のプローブとして使用され、摩耗に強く、長期間にわたって精度を維持する。
Details of tungsten carbide sphere:
FAQ for tungsten carbide spheres:
Q1: What is a tungsten carbide sphere?
A tungsten carbide sphere (also called tungsten carbide ball or cemented carbide sphere) is a precision sintered spherical component made of tungsten carbide (WC) hard grains bonded with cobalt (Co) or nickel (Ni) metal binder. It features ultra-high hardness, exceptional wear resistance, high density and excellent dimensional stability, widely used in high-load precision industrial scenarios including valve sealing, bearings, ball mill grinding media and metrology gauges. Typical density ranges from 14.0–15.0 g/cm³ with hardness HRA 84–94.
Q2: What is the difference between WC-Co and WC-Ni carbide spheres?
WC-Co (YG series): Standard mainstream grade with higher hardness and abrasion resistance, lower production cost. The cobalt binder is vulnerable to strong acid corrosion. Ideal for bearings, general hydraulic valves, and dry grinding media.
WC-Ni (YN series): Cobalt-free formulation with outstanding acid and alkali corrosion resistance, with slightly lower hardness and impact toughness. Designed for chemical fluid valves, marine equipment and corrosive liquid working conditions.
Q3: How to choose the right cobalt binder percentage?
(1) Low cobalt (5–6% Co, YG6 / YG6X): Fine grain, maximum wear resistance, lower impact tolerance. Best for precision gauges, micro bearings and fine powder grinding.
(2) Medium cobalt (8–10% Co, YG8): Balanced toughness and abrasion resistance, the most universal grade. Suitable for hydraulic valve balls and planetary mill grinding media.
(3) High cobalt (13–20% Co, YG13 / YG20): Superior impact resistance, relatively lower hardness. Used for mining high-shock valves and heavy percussion sealing parts.
Q4: Are tungsten carbide spheres acid resistant?
Standard YG cobalt-bonded tungsten carbide spheres are not resistant to strong acids. Hydrochloric acid, nitric acid and aqua regia will dissolve the cobalt binder and cause surface pitting and peeling. For corrosive fluid environments, select YN nickel-bonded corrosion resistant tungsten carbide spheres. WC-Co grades are chemically stable in neutral water, weak acids and weak alkalis under normal temperature.
Q5: Can I customize non-standard tungsten carbide spheres?
Yes, As an experienced tungsten carbide sphere manufacturer in China, we offer full customization services, including:
(1) Dimensions & Tolerances: Non-standard diameters with custom tight tolerances exceeding ISO G3 standards.
(2) Material Formulation: Tailored WC-Co or WC-Ni binder ratios and grain size grades.
(3) Surface Finishes: Optional mirror polish, matte grinding, or as-sintered blanks.
(4) Post-Treatments: Cryogenic treatment to enhance dimensional stability and wear resistance, as well as anti-rust coatings.
Q6: What is the minimum order quantity (MOQ)?
Stock standard YG6/YG8 polished spheres: 0.5 kg for small trial orders acceptable.
Custom non-standard size / YN anti-corrosion grade: MOQ 1–5kg (negotiable).
Q7: How long is the production lead time?
In-stock standard polished tungsten carbide spheres: 2–3 working days.
Custom HIP sintered + precision polishing spheres: 10–15 working days.
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