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Floated Side AF Series Ball Screw Bracket

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Floated Side AF Series Ball Screw Bracket

The AF series is the smallest and lightest floating end unit in the support base product line. It is specifically designed to provide auxiliary support for miniature ball screws (such as the SFK series) with shaft diameters typically ≤12mm, providing stable radial constraint while allowing for slight thermal expansion of the screw shaft. Its extremely compact design allows for easy integration into cutting-edge products with extreme space constraints, such as miniature robots, precision optical equipment, and medical instruments.

Technology

The AF series perfectly inherits the miniaturization genes of the AK series, making it an indispensable "flexible partner" for miniature screw systems.

Product Features AF Series Support End (Floating End) EF Series Support End Standard BF Series Mounting End
Core Positioning Ultra-miniature floating end, designed for miniature lead screws and extremely compact spaces. Compact, economical floating end designed for small to medium-sized lead screws. A versatile and reliable floating end with a wide range of applications.
Dimensions and Weight Extremely compact and lightweight, with the smallest dimensions and weight in the entire series. Compact design, smaller than the BF series. Standard industrial dimensions.
Suitable Lead Screw Diameter Micro-sized (typically φ6–φ12 mm), fully compatible with the AK series. Suitable for small to medium-sized lead screws (typically 12–25 mm in diameter). Suitable for small to large sizes (typically from 15 mm in diameter).
Internal Bearings Micro deep-groove ball bearings enable low-friction floating in extremely confined spaces. Standard deep-groove ball bearings. Standard deep-groove ball bearings.
Installation Features Micro-sized mounting interfaces require extremely high installation precision. Easy to install, with moderate precision requirements. Secure mounting and high versatility.
Typical Applications Surgical robots, fibre-optic devices, cell manipulators, micro-probe stations. Desktop CNC machines and light-duty automated modules. Suitable for general-purpose CNC machine tools and industrial robots.

Main Technical Parameters and Design
1. Miniaturized Integrated Design:
Uses ultra-small deep groove ball bearings to ensure smooth axial floating at the micron level.
The structure is highly integrated, usually omitting external locking components, relying on the precision fit (micro-gap) between the bearing and the shaft to achieve the floating function, and may use elastic retaining rings or circlips for axial limiting.
The housing is made of aluminum alloy or high-strength engineering plastic to minimize weight.

2. Core Function Implementation:
The core of its design is to provide radial support without generating any additional axial constraint force, ensuring that the miniature screw can freely expand and contract when the temperature rises or under load, preventing system jamming or stress.

3. Precision Installation Requirements:
The mounting flange is a miniature design, fixed with M2 or M2.5 screws.
Due to the miniaturization of the system, the flatness, parallelism of the mounting surface, and the alignment accuracy with the screw axis are extremely demanding; even small deviations can lead to rough operation or additional wear.

Applications
The AF and AK series are the golden combination for the following micro-precision fields:
Miniature medical robots: Support for joints or feeding mechanisms in vascular surgery robots and microsurgical equipment.
Precision optics and communication: Internal optical path calibration of tunable lasers, optical switch arrays, and micro-displacement support for fiber optic docking platforms.
Bioengineering and scientific research: Precision moving parts for cell injectors, gene sequencers, and scanning ion conductance microscopes.
High-end consumer electronics: Miniature optical zoom and focusing modules in AR/VR devices. The Floated Side AF Series Ball Screw Bracket is a perfect embodiment of the "combination of rigidity and flexibility" concept in precision engineering at the micro-scale. It demonstrates that even in almost invisible spaces, the fundamental safeguards for motion reliability—support and thermal compensation—remain crucial and must be implemented with precision. Choosing the AF series means your miniature device design takes into account the most subtle thermodynamic effects, laying the foundation for ultimate stability and reliability.

Parameters

Model No. Shaft
Diameter d1
L B H b
±0.02
h
±0.02

B1

H1
P X Y Z Bearing Using C-type
Cramp Ring
Weight
(kg)
AF10 8 20 70 43 35 25 36 35 52 9 14 11 608ZZ S08 0.36
AF12 10  20  70  43  35  25  36  35  52  14  11  6000ZZ S10 0.36 
AF15 15  20  80  49  40  30  41  40  60  14  11  6002ZZ S15 0.44 
AF20 20  26  95  58  47.5  30  56  45  75  11  17  15  6204ZZ S20 0.73 
AF25 25  30  105  68  52.5  35  66  25  85  11  - - 6205ZZ S25 0.95 

Drawings

Model No. Part Name Qty
Housing
Bearing 1set
Snap ring

Bracket Selection

Fixed-side support unit ID (mm) Fixed-side support unit applicable model Supported-side support unit iD(mm) Supported-side support unit applicable model
5 EK05 - - Φ6
FK05
6 EK06 6 EF06 Φ8
FKO6 FF06
8 EK08 6 EFO8 Φ10
FKO8 FFO8
10 EK10 8 EF10 Φ12,Φ14,Φ15
FK10 FF10
BK10 BF10
AK10 AF10
12 EK12 10 EF12 Φ14,Φ15,Φ16
FK12 FF12
BK12 BF12
AK12 AF12
15 EK15 15 EF15 Φ18,Φ20
FK15 FF15
BK15 BF15
AK15 AF15
17 BK17 17 BF17 Φ20,Φ25
FK17 FF17
20 EK20 20 EF20 Φ25,Φ28
FK20 FF20
BK20 BF20
AK20 AF20
25 EK25 25 EF25 Φ32,Φ36
FK25 FF25
BK25 BF25
AK25 AF25
30 FK30 30 FF30 Φ36,Φ40,Φ45
BK30 BF30
35 BK35 35 BF35 Φ45
40 BK40 40 BF40 Φ50
FK40 FF40
50 BK50 50 BF50 Φ63,Φ80
60 BK60 60 BF60 Φ80,Φ100