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Mini Type SFK Series Ball Screw

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Mini Type SFK Series Ball Screw

Mini Type SFK Series Ball Screw

The Mini type SFK series ball screw is a precision transmission component with an extremely small shaft diameter and a highly compact structure. It inherits the excellent characteristics of ball screws, such as high precision and high efficiency, and condenses them into a miniature size, providing a powerful "micro-power heart" for small-scale automation devices, precision instruments, micro-robots, and consumer electronics.

Technology

The core value of the SFK series lies in "driving the precision world in millimeters." It differs fundamentally from other series in terms of size and performance.

Characteristic Dimensions SFK Series Miniature Standard compact series (SFU1204) Straight-through type (SCA series)
Core Advantages Achieving extreme miniaturisation and lightweight design for precision transmission within micro-spaces. Compact, economical and versatile. Compact structure, flexible installation.
Size Range Shaft diameters typically ≤6mm (e.g., 3mm, 4mm, 6mm), with pitches often 1mm or smaller, resulting in exceptionally compact overall dimensions and minimal weight. Shaft diameter typically ≥12mm, classified as compact standard products. Wide range of sizes, though miniaturisation is not its forte.
Transmission Efficiency High efficiency, though manufacturing tolerances significantly impact performance due to micro-scale dimensions. High. High.
Load Capacity Relatively low load capacity, suitable for light loads (typically several to tens of newtons). Moderate, suitable for routine light loads. Depends on specifications, wide range.
Precision Challenges Manufacturing presents extreme challenges, requiring ultra-precision machining to ensure raceway quality, smooth ball circulation, and uniform preload distribution. Manufactured to standard tolerances with proven processes. Manufactured to standard accuracy.
Application Fields Applications include micro-robotics, precision optical alignment, medical catheter equipment, micro-dispensing valves, and high-end modelling. Compact automated equipment, instrumentation and gauging. Various equipment with limited space.

Main Technical Parameters and Design
Precision Manufacturing: The grinding of the ball screw shaft raceway, the processing of the nut, and the assembly of tiny steel balls (with diameters possibly less than 1mm) require extremely high manufacturing precision.
Structural Innovation: May employ end-cap circulation or special miniature recirculators to accommodate the extremely small internal space.
Materials and Heat Treatment: High-strength alloy steel is often used and subjected to special heat treatment to ensure sufficient strength and wear resistance at miniature sizes.
Accuracy and Performance: Available in C5, C7, and even higher precision grades. Due to its extremely small lead, it can often achieve sub-micron precision displacement control.
Specifications and Selection: Offers extremely small shaft diameters from φ3mm to φ10mm, with leads typically of 0.5mm, 1mm, 2mm, etc. Users need to carefully calculate load, speed, and lifespan.

Applications
The Mini type SFK series ball screw is the ideal power source for the following miniaturized and lightweight cutting-edge equipment:
Micro-automation and Robotics: Desktop micro-robotic arms, micro-motion platforms in chip packaging equipment, joint drives for bionic micro-robots.
Precision Optics and Instruments: Fiber optic alignment equipment, micro-adjustment axes for laser engraving machines, automatic focusing mechanisms for microscopes.
Medical and Laboratory Equipment: Cell manipulators, gene sequencers, precision feeding mechanisms for microfluidic chips, fine end-effectors for surgical robots.
High-end Consumer and Model Products: High-precision 3D printer nozzle lifting, professional camera sliders, rudder control for high-end model aircraft.

The Mini type SFK series ball screw is an outstanding representative of precision engineering's advancement into the microscopic realm. It breaks the limitations of "efficient and precise transmission being difficult to achieve in small spaces," condensing the essence of ball screw technology into a compact design. Choosing the SFK series means equipping your miniaturized innovative products with professional-grade, highly reliable core motion components, which is key to creating differentiated competitiveness and a superior product experience.

Parameters

Model No. d I Da Dimension Load Rating Rigidity Weight
D A B L W H X Y Z Q n Ca(kgf) Coa(kgf) Kgf/um Kg
SFK0401 0.8  10  20  12  15  14  2.9  - - - 1x2 64  97  0.024 
SFK0601 0.8  12  24  3.5  15  18  16  3.4  - - - 1x3 111  224  0.018 
SFK0801 0.8  14  27  16  21  18  3.4  - - - 1x4 161  403  14  0.027 
SFK0802 1.2  14  27  16  21  18  3.4  - - - 1x3 222  458  13  0.026 
SFK082.5 2.5  1.2  16  29  26  23  20  3.4  - - - 1x3 221  457  13  0.038 
SFK1002 10  1.2  18  35  28  27  22  4.5  - - - 1x3 243  569  15  0.056 
SFK1004 26  46  10  34  36  28  4.5  4.5  M6 1x3 468  905  17  0.068 
SFK1202 12  1.2  20  37  28  29  24  4.5  - - - 1x4 334  906  22  0.062 
SFK1402 14  1.2  21  40  23  31  26  5.5  - - - 1x4 354  1053  24  0.081 
SFK1602 16  1.2  25  43  10  40  35  29  5.5  - - M6 1x4 373  1200  26  0.236 

Drawings


Production Capacity

Cyclone Milling Machines

LWN160-6000mm Leistritz Cyclone milling machines imported directly from
Germany, the ball screw shaft precision can be C3, C5, and C7 the max length
can be 7000mm

Rolled Thread CNC Machines

PR-40CNC Profiroll rolled thread ball screw machines imported directly from
Germany the ball screw shaft precision can be C5, C7 -C10

Rolled Thread CNC Machines

ST-20.2 and ST-347.7 rolled thread ball screw machines from TaiWan.
The ball screw shaft precision can be C7 - C10

Ball Screw Assembly Workshop

We conduct nut assembly in a constant temperature workshop,  all workers
having decades of work experience and zero clearance between the screw
and nut.

Ball Screw Assembly Workshop

One ball screw shaft matches one ball screw nut. Because each ball screw
shaft has a very tiny different tolerance. There are dozens of different
ball sizes for different screw shaft.
Our ball screw shaft and nut can be interchanged with the Taiwan
TBI ball screw shaft and nut very well.