Based on the model definition (M = Standardized, I = Floating Diverter, S = Square Nut), international ball screw standards (ISO 3408-2:2021), and industrial general specifications, the core basic parameters are summarized below, catering to both selection reference and B-end procurement decision-making needs.
Product Model: MIS0801B-99-140-C5. The model is broken down as follows: M (Standardized Design) + I (Floating Diverter) + S (Square Nut) + 08 (Nominal Diameter 8mm) + 01 (Lead 1mm) + B (Dual-Plane Flange Specification) + 99 (Effective Stroke 99mm) + 140 (Total Length 140mm) + C5 (Accuracy Class).
Structure Type: Internal circulation ball screw. Equipped with a floating diverter to achieve efficient ball circulation and reduce friction loss.
Nut Type: Square nut (with dual-plane flange). Features a standardized mounting structure, compatible with general-purpose mounting brackets for easy assembly and disassembly.
Manufacturing Standard: Compliant with ISO 3408-2:2021. Follows metric series dimension specifications, with mounting dimensions compatible with international standards.
Processing Technology: Grinding process. Meets the requirements of C5-level high precision, ensuring better thread accuracy and surface roughness.
Nominal Diameter (d): 8mm. Refers to the diameter at the center of the balls, serving as the core load-bearing dimension and conforming to metric standard series.
Lead (s): 1mm. Represents the distance the nut moves when the screw rotates one full turn. Lead = Pitch × Number of Starts (Number of starts n = 1).
Effective Stroke: 99mm. Denotes the stable linear movement stroke achievable by the nut, suitable for short-stroke precision transmission scenarios.
Total Length of Screw: 140mm. Includes the mounting section, effective thread section, and safety margin. Complies with the design specification of slenderness ratio ≤ 60 (8mm × 60 = 480mm, 140mm ＜ 480mm, ensuring stable performance).
Nut Length: 28mm. Standardized square nut size, matched with an 8mm nominal diameter to ensure structural rigidity.
Flange Size: 4 evenly distributed bolt holes. Complies with ISO 3408-2:2021 Series 1 specifications, with bolt hole specifications compatible with M6×1 threads.
Lubrication Port Specification: M6×1. Standardized threaded interface for easy grease filling, extending service life.
Accuracy Class: C5 class. An internationally recognized high-precision class, with better positioning accuracy than C7 class, suitable for CNC machine tools and precision equipment.
Positioning Accuracy: ≤0.05mm/300mm. Represents the maximum deviation between the actual movement distance and the theoretical command value, meeting the upper limit requirement of C5 class standards.
Repeat Positioning Accuracy: ≤0.03mm. Denotes the maximum deviation when moving to the same position multiple times, ensuring stable movement repeatability.
Lead Error: ≤0.04mm. Refers to the deviation between the actual lead value and the theoretical value within the full stroke, controlling the error of transmission accuracy.
Axial Backlash: ≤0.005mm. Represents the lost motion during forward and reverse rotation of the screw. Optimized through the floating diverter structure, resulting in minimal backlash.
Transmission Efficiency: ≥90%. The rolling friction coefficient is only 0.003-0.005, far superior to sliding screws (with efficiency of 30%-50%)
Basic Static Load Rating (C0): 3.8kN. Calculated based on the 8mm diameter internal circulation structure, complying with the load specifications of ISO 3408-2:2021 Series 1.
Basic Dynamic Load Rating (C): 1.2kN. Represents the rated load-bearing capacity during long-term continuous operation. The working load must be less than this value to ensure service life.
Maximum Axial Static Load: 2800N. Denotes the upper limit of short-term static force, suitable for start-stop impact loads of precision equipment.
Theoretical Service Life: ≥1 million revolutions. Calculated based on dynamic load and operating speed under good lubrication conditions (service life is better when speed ≤ 1500r/min).
Screw Material: Bearing steel (GCr15). Features high strength and hardness, reaching HRC60-62 after heat treatment, with excellent wear resistance and deformation resistance.
Nut Material: Alloy structural steel. Matched with the screw material to ensure the wear resistance of the friction pair and extend service life.
Surface Treatment: Passivation treatment. Enhances corrosion resistance, suitable for conventional industrial environments such as humidity and dust. Hard chrome plating upgrade is optional.
Preload Class: Medium preload. Eliminates axial backlash, improves transmission rigidity, and avoids vibration and impact during high-speed operation.
Application Scenarios: Suitable for short-stroke, high-precision transmission needs such as 3D printers, micro CNC machine tools, visual inspection systems, and small automated actuators.
Speed Limit: The recommended maximum speed is ≤1500r/min (the limit speed is ≤2000r/min, which requires forced lubrication).
Rigidity Parameter: Axial stiffness ≥22N/μm, meeting the deformation control requirements during precision positioning.
Installation Note: The square nut is equipped with a dual-plane flange, and the bolt fixing method is standardized. No custom mounting bracket is required, and it is compatible with general mechanical structures.
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