TECHNICAL SCHEMATIC / 结构示意图 — 本条为目录条目，尚无经核验的实拍图。该图按类别原创绘制，仅示意结构，非产品照片、不作为验收依据；实拍图与尺寸图随报价单提供 [待补实拍]。
Bearings & Power Transmission · 轴承与传动件HS 8483.90SKU YB-IND-004RFQ · 询价条目
Keyless Locking Assembly / Shrink Disc (胀紧联结套)
A friction-based shaft-to-hub connection that replaces keys and splines, used where torque is high or indexing must be adjustable.
价格、起订量、交期与关税 / Commercial terms
Price on request（按询价确认）· MOQ by RFQ · Lead time confirmed per order · Pakistan duty per current 8-digit PCT [待核验]。
本页不发布未经确认的 FOB 价格、MOQ 数字、库存状态或税率；一切以正式报价单 / PI 为准。
Price on request（按询价确认）· MOQ by RFQ · Lead time confirmed per order · Pakistan duty per current 8-digit PCT [待核验]。
本页不发布未经确认的 FOB 价格、MOQ 数字、库存状态或税率；一切以正式报价单 / PI 为准。
资料口径：本条规格为公开标准型号的工程参数；产地为公开产业集群信息（典型供货产业带），实际厂家、原产地证与材质证明以报价单为准 [待确认]。本页不声称任何进口排名、需求热度、市场份额或库存。
At a glance · 快速对照
简要用途 / Brief useA friction-based shaft-to-hub connection that replaces keys and splines, used where torque is high or indexing must be adjustable.
典型应用场景 / Typical applicationsLarge conveyor pulleys · Mixers & heavy rotors · Wind / hoist drives · Retrofits replacing worn keyways
供应与产地 / Typical sourcing base典型供货产业带：浙江宁波、山东聊城、江苏无锡（轴承与链传动产业带）。该产业带为公开产业集群信息；实际供货厂、产地与原产地证以报价单为准 [待确认]。
HS 归类 / Classification8483.90（国际 HS 6 位品目）；巴基斯坦 8 位 PCT 子目与当期税率由清关代理确认 [待核验]。
可筛选标签 / Filter tags
Key specifications · 关键规格参数
| Parameter | Specification |
|---|---|
| Type | Internal clamping / external shrink disc / flange type |
| Shaft diameter | Per series table, e.g. 20-120 mm ranges |
| Transmissible torque | Per manufacturer rating table for the selected series |
| Clamping | Tightening bolt circle, specified torque from datasheet |
| Tolerance | Shaft h8 / hub H8 typical, confirm per series |
| Material | Alloy steel, phosphate or black-oxide finish |
| Standards | Interchangeable with common RfN / KTR / Z-series designations |
上表为标准型号 / 通用工程参数，用于选型比对；实际供货型号、公差、材质与等级以厂家数据表（datasheet）及正式 PI 为准 [待确认]。
Product detail · 详情说明
A locking assembly creates a press-fit by wedging tapered rings with a bolt circle, so no keyway is cut in the shaft. It is the standard remedy when a keyway has fretted or when a pulley must be angularly indexed during commissioning.
The rating depends on shaft diameter, hub wall thickness and bolt tightening torque — not on the nominal size alone. Provide the shaft and hub dimensions plus transmitted torque; we select the series from the manufacturer table and supply the tightening sequence.
选型与验收要点 / Selection & acceptance points
- No keyway machining and no shaft weakening
- Adjustable angular indexing during commissioning
- Reversible — can be disassembled without damage
- Selected from torque / hub-wall rating, not nominal bore alone
Applications · 典型应用场景
Large conveyor pulleysMixers & heavy rotorsWind / hoist drivesRetrofits replacing worn keyways
Supply, origin & documents · 供应产地与单据
典型供货产业带 / Typical sourcing base典型供货产业带：浙江宁波、山东聊城、江苏无锡（轴承与链传动产业带）。该产业带为公开产业集群信息；实际供货厂、产地与原产地证以报价单为准 [待确认]。
包装与装箱 / Packing
- 按型号与订单量确定，装箱单于出运前确认 / Confirmed on the packing list before shipment
可提供的文件 / Documents available on request
- 厂家数据表 (factory datasheet) on request
- 材质 / 检测证明 (material & test certificate) on request
- 商业发票、装箱单、提单 / 空运单、原产地证、HS 编码技术数据表（每单随附）。
Data basis & open items · 资料口径与待确认项
为什么纳入这个品类 / Why this category is listed
HS 84 machinery is among Pakistan's largest non-fuel import chapters (UN Comtrade 2024, 5.1%); PBS FY2024 machinery group +46.3%. Power-transmission wear parts are the recurring replacement side of that installed base. 单品需求热度 [待核验]。
HS 84 machinery is among Pakistan's largest non-fuel import chapters (UN Comtrade 2024, 5.1%); PBS FY2024 machinery group +46.3%. Power-transmission wear parts are the recurring replacement side of that installed base. 单品需求热度 [待核验]。
口径说明 / Scope: The figures above are HS 2-digit chapter totals or a national commodity group from official / intergovernmental trade statistics. They identify which industrial chapters are large in Pakistan's import basket; they do NOT give an import ranking, demand volume, market share or growth rate for any individual part listed on this page. UN Comtrade (calendar-year goods basis, US$56.5B) and PBS (fiscal-year basis, US$54.779B) use different scopes and must not be compared directly. 任何单品的进口排名、需求热度与精确数值均 [待核验]，需以 HS 8 位清关数据 / 采购记录为准。
本条明确待确认 / Explicitly open items
- 价格、数量阶梯、MOQ、交期与付款条件 → 以正式报价单 / PI 为准 [待业务确认]。
- 巴基斯坦 8 位 PCT 子目、当期关税与销售税 → 由清关代理按进口当日税则核验 [待核验]。
- 实际生产厂、品牌、原产地与材质 / 检测证明 → 以报价单和原产地证为准 [待确认]。
- 产品实拍图、尺寸图与批次检测报告 → 随询价提供 [待补实拍]。
- 单品进口排名、需求热度、市场份额与任何精确数值 → 本页不作声称 [待核验]。
Frequently Asked Questions
Send the part number, a photo of the nameplate / old part, or the machine model and required dimension. We reply with the applicable standard designation and a factory datasheet; the final specification is fixed on the proforma invoice.
Commercial invoice, packing list, certificate of origin, bill of lading or AWB, and an HS-coded technical datasheet. The HS 6-digit heading shown on this page is the international classification; your clearing agent confirms the Pakistan 8-digit PCT subheading and the duty rate applicable on the date of import.
No. The location named under 'Typical sourcing base' is a publicly known industrial cluster, given to help you understand the supply chain. The actual factory, country of origin and any mill / test certificate are confirmed in writing on the quotation and the certificate of origin. Treat it as [待确认] until then.
Often yes — the hub must have enough wall thickness for the clamping pressure. Send the hub OD and material and we check it against the series rating before quoting.
Not answered here?Ask the sales engineer for a datasheet, dimensional drawing, cross-reference or a mixed RFQ covering several lines.
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