Combined with the model meaning (M = Standardized, I = Flow Diverter, C = Cylindrical Nut with Keyway) and ball screw naming conventions, the core parameters of this model are as follows:
Model Composition: MIC0802-51.6-66It consists of M (Standardized Design for strong universality) + I (Flow Diverter for optimized ball circulation) + C (Cylindrical Nut with Keyway for anti-rotation positioning) + 0802 (Core Specification) + 51.6 (Auxiliary Parameter) + 66 (Length Parameter).
Core Characteristics of the Nut:
Nominal Diameter: 8mm (the "08" in the model is a common industry designation, corresponding to an 8mm outer diameter of the screw);
Lead: 2mm (the "02" represents the lead, meaning the nut moves 2mm per full rotation of the screw). It belongs to a medium-small lead, balancing precision and speed.
Structure Type: Cylindrical nut with keyway (marked by "C"). The cylindrical body facilitates installation in compact spaces, and the keyway design enables connection with external structures (e.g., worktables) via a key. This prevents nut rotation, allowing only axial linear movement and enhancing transmission stability.
Matching Screw Specifications:
Length-Related Parameters:
The "66" at the end of the model most likely refers to the nut length or the effective length of the screw (in line with industry practices, a 66mm length matches an 8mm diameter, ensuring balanced structural rigidity);
The "51.6" is an auxiliary parameter, which may represent the keyway size (e.g., 51.6mm keyway length) or the matching section length of the nut. Specific values need to be confirmed by actual measurement, and it primarily affects the connection compatibility with equipment.
Accuracy and Performance:
Accuracy Class: The standardized design (M) typically covers C5-C7 classes (C5 is recommended for precision scenarios, and C7 for general scenarios), with a positioning error of ≤0.05mm/300mm;
Axial Play: ≤0.01mm by default for a single nut (can be optimized to ≤0.005mm via preloading). The flow diverter (I) reduces ball circulation friction, achieving a transmission efficiency of ≥90%;
Rated Load: Referring to parameters of the same specification, the dynamic load is approximately 1.2-2.1kN, and the static load is approximately 2.0-3.8kN, suitable for medium-light load scenarios.
Installation and Compatibility:
Keyway Specification: Usually compatible with standard flat keys (e.g., 3-5mm width, 1.8-3mm depth). Specific details need to be confirmed based on the 51.6mm parameter to ensure matching with the equipment positioning structure;
Standardized Interface: Follows general installation tolerances and can directly replace nuts of the same-specification ball screws, reducing replacement costs.
The "cylindrical nut with keyway + flow diverter" design of this product is mainly suitable for transmission scenarios requiring "nut anti-rotation, compact space, and medium-light load with high precision", including:
Typical Applications: Desktop laser engraving machines, feed axes of small CNC lathes, and displacement mechanisms of precision coordinate measuring machines.
Adaptation Reasons: The cylindrical nut saves installation space, and the keyway prevents rotation to ensure displacement accuracy; the 2mm lead combined with the flow diverter enables low-speed and stable feeding, meeting the 0.01mm-level positioning requirements of laser engraving.
Typical Applications: Lens movement axes of PCB testing machines and feeding mechanisms of electronic component packaging machines.
Adaptation Reasons: The standardized design (M) ensures consistency in batch replacement, and the keyway connection avoids detection position deviation caused by nut rotation; the flow diverter reduces operating noise and protects electronic components from vibration interference.
Typical Applications: Sample pushing mechanisms of blood analyzers and drive axes of laboratory micro-pipettes.
Adaptation Reasons: The cylindrical structure is suitable for the compact space of equipment, and the keyway positioning ensures action repeatability (error ≤0.02mm); the high transmission efficiency (≥90%) reduces motor power consumption, meeting the low-noise and low-energy requirements of medical devices.
Typical Applications: End effectors of collaborative robots and transmission units of small linear modules.
Adaptation Reasons: The keyway connection enhances the rigid connection between the nut and the robotic arm, avoiding loosening during dynamic operations; the flow diverter optimizes ball circulation and supports rapid start-stop (response time ≤0.1s), adapting to dynamic tasks such as picking and placing.
Typical Applications: Feeding mechanisms of small automatic screw-locking machines and label positioning axes of packaging equipment.
Adaptation Reasons: The keyway design simplifies installation (no additional anti-rotation structure is required), and the standardized specifications reduce procurement and maintenance costs; the adaptability to medium-light loads meets the transmission needs of most general equipment, and it replaces sliding screws to extend service life by 3-5 times.
Keyway Matching: Confirm the key size (width, length) of the equipment connection end to match the nut keyway (parameters related to 51.6mm) and avoid positioning errors caused by assembly gaps;
Load Control: The actual load is recommended not to exceed 50% of the rated dynamic load to extend service life;
Environmental Protection: When used in humid or dusty environments, dust covers or sealing rings should be used to protect the keyway and ball circulation system.
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