Product Description
In the fields of industrial automation, robotics and new energy vehicles, motor equipment imposes increasingly stringent requirements on lightweight design and high power density, making Hollow Motor Shaft the optimal choice for high-end motor manufacturing. Our Hollow Motor Shaft is specially developed for motors designed with high-speed response and internal cooling/wiring channels. The hollow shaft structure can significantly reduce rotational inertia, improve motor dynamic response speed, and serve as internal air cooling, liquid cooling or wiring passages. However, the major difficulty in hollow shaft processing lies in eccentricity and uneven wall thickness easily induced during deep hole drilling. We utilize professional deep hole drilling equipment and precise internal & external cylindrical grinding processes to control hollow shaft wall thickness tolerance within 0.03mm, perfectly eliminating eccentric vibration during high-speed operation.
In the processing practice of Taizhou Lihuan Machinery, every Hollow Motor Shaft undergoes strict stress relief annealing after rough machining to prevent deformation caused by internal stress release during subsequent deep hole drilling and cutting. While ensuring lightweight design, we optimize material selection and heat treatment processes to make its torsional stiffness and bending strength fully comparable to solid shafts. We once customized ultra-precision hollow shafts for a robot joint motor manufacturer, helping reduce overall weight of its mechanical arm joints by 18% with a 99.8% dynamic balance compliance rate for complete machines. Our profound precision processing expertise will deliver more competitive technical advantages for your motor products.
Specification Parameters
| Key Parameters | Detailed Specifications |
|
Core Advantages |
Lightweight design, reduced rotational inertia, internal heat dissipation/wiring passage |
|
Deep Hole Machining |
Deep hole drilling diameter φ5mm-φ50mm, wall thickness uniformity ≤ 0.03mm |
|
Common Materials |
Stainless steel (SUS304/316/303), 45# steel, 40Cr, aluminum alloy (6061/7075) |
|
Precision Tolerances |
Internal & external circle coaxiality ≤ 0.015mm, outer circle radial runout ≤ 0.01mm |
|
Surface Roughness |
Outer circle ground area Ra 0.2-Ra 0.4; internal deep hole area Ra 0.8-Ra 1.6 |
Application Fields
Mainly supporting robot joint motors, high-speed servo motors, new energy vehicle drive motors, precision electric spindles, aerospace model motors, liquid pump shafts and other products.
Export Anti-rust & Ocean Shipping Packaging Standards
Targeting the risk of moisture accumulation and rust inside hollow shaft bores, we have formulated special export anti-rust packaging standards. After thorough cleaning and drying, anti-rust oil is evenly sprayed on both internal bores and external surfaces, with outer circles sleeved with anti-collision PE protective nets. Products are neatly stacked in plywood cases lined with VCI anti-rust bags and sealed, with desiccant packs placed inside. Outer cases adopt reinforced fumigation-free plywood export crates sealed with packing tape and covered with waterproof stickers, ensuring products remain free from moisture erosion during cross-ocean shipping spanning dozens of days.
FAQ
Q1: How long is the development cycle for customized hollow shafts?
+
-
A1: Simple ordinary customized parts take 10–15 working days upon drawing and sample confirmation; regular precision hollow shafts require 15–20 working days; products with complex special processes such as carburizing, black oxide finish or hard anodizing usually have a cycle of 20–25 working days.
Q2: Will I receive production progress updates during manufacturing?
+
-
A2: Yes. Our sales coordinators will regularly send on-site photos or videos covering key stages from raw material production, deep hole drilling, precision grinding and heat treatment to packaging and shipment, offering full transparent visibility of the entire process.
Q3: How are non-conforming products handled?
+
-
A3: If dimensional deviations exceeding drawing tolerances are found after goods receipt, we take full responsibility upon mutual verification and arrange priority free re-production and delivery in the shortest time, or refund payment corresponding to the quantity of non-conforming products.
Quality Control & Testing Equipment
We have established a complete quality testing laboratory equipped with coordinate measuring machines (CMM), precision internal micrometers, air gauges, surface roughness meters and surface profile projectors. Before packaging, quality inspectors conduct 100% full inspection on hollow shaft wall thickness uniformity, internal & external circle coaxiality and outer diameter dimensions, with all inspection data recorded and archived to ensure full traceability of every batch of delivered products.
Hot Tags: hollow motor shaft, China hollow motor shaft manufacturers, suppliers, factory, machining fixture components, nitrided parts processing, Servo Motor Shaft, shaft precision manufacturing parts, shaft support end, shaft support journal
