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FK/EK/AK Ball Screw End Machining Fixed Side

Home · Products · Ball Screw Brackets · FK/EK/AK Ball Screw End Machining Fixed Side

FK/EK/AK Ball Screw End Machining Fixed Side

FK/EK/AK Fixed Side Machining is a differentiated precision machining service performed on the ball screw shaft ends, based on the respective standards of the FK (high-performance), EK (compact), and AK (miniature) series fixed-end support units. This service ensures that ball screws of different positions and sizes can be quickly and accurately assembled with their corresponding support units and lock nuts with zero risk of incompatibility, maximizing the performance advantages of each series.

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Technology

The core of this service lies in "precise matching and unleashing potential." While the machining requirements vary for different series, the common goal is to ensure system-level performance.

Characteristics	FK Series (High-Performance) Manufacturing	EK Series (Compact) Machining	AK Series (Micro) Machining
Core Objectives	Designed to meet ultra-high rigidity and high-precision requirements, with the strictest manufacturing tolerance controls.	Designed to meet the demands of compact spaces and cost-effectiveness, optimizing machining while ensuring full functionality.	Designed to meet the demands of miniaturization and ultra-lightweight applications, pushing the boundaries of micro-machining.
Accuracy Requirements	The geometric and positional tolerance requirements—including shaft shoulder end face runout, thread accuracy, and keyway symmetry—exceed industry standards to ensure the ultimate performance of FK bearings.	High precision. Adheres to the standard accuracy requirements for compact products, ensuring a balance between reliability and cost-effectiveness.	Extremely high. Achieving high precision at the micro scale places stringent demands on machine tools and cutting tools.
Manufacturing Challenges	This guarantees the absolute reliability of the locking mechanism and uniform transmission of preload under heavy-load and high-speed operating conditions.	Completes machining of all necessary features (shanks, threads, keyways) within a shorter shank length.	Micrometer-level dimensional control prevents machining stress deformation and enables the precision milling of micro threads and keyways.
Key Features	May support larger locking nuts or thicker shaft shoulders to accommodate higher preload forces.	Dimensions differ from the BK Series; thread specifications, keyway positions, and widths must all comply with EK-specific standards.	Extremely small thread sizes such as M3 and M4, as well as micro keyways, are commonly used; in some cases, keyways may even be omitted in favor of special processes using set screws for fastening.
Value Proposition	Ensures the precision and service life of top-tier equipment (such as precision machine tools).	Provides plug-and-play convenience for small and medium-sized equipment with limited space.	Enabling the possibility of precision transmission in micro-scale equipment.

Detailed Machining Content
Despite the different series, the core machining content revolves around the assembly interface of the fixed end:

Precision turning of the shaft shoulder and datum surface: Machining a precise axial positioning surface to ensure complete contact with the inner ring end face of the bearing.

Cutting specified threads: Machining high-precision external threads according to the nut specifications matched to FK/EK/AK (such as different sizes of the RN series).

Milling keyways or machining locking holes:

FK/EK: Typically milling standard keyways for engagement with anti-loosening washers.

AK: May mill miniature keyways, or drill and tap side set screw holes at specific locations.

High-precision chamfering and deburring: Especially for the FK and AK series, perfect edge treatment is crucial for protecting precision bearings and ensuring smooth installation.

Service Applications
FK Ball Screw Shaft End Machining: Serves the manufacturing and maintenance of high-end CNC machine tools, semiconductor manufacturing equipment, and precision measuring platforms.
EK Ball Screw Shaft End Machining: Serves the integration of desktop CNC machines, light automation modules, and educational and research instruments.
AK Ball Screw Shaft End Machining: Serves the research and development and production of miniature robots, precision optical devices, medical catheter equipment, and high-end instruments.

The FK/EK/AK fixed-end machining service is a technical hub that transforms standardized components into customized solutions. It deeply understands the design philosophy of different series products and implements it through precision machining. Choosing this service means you are not only purchasing parts, but also gaining a high-performance assembly experience that matches the product positioning. Whether it's the pursuit of ultimate precision in the FK series, the focus on cost-effectiveness in the EK series, or the challenge of size limitations in the AK series, professional machining services are a crucial step in ensuring the perfect realization of their design intentions.

_Parameters

Model No.			Shaft Support OD	Shaft Support OD					Metric Screw Thread		Ferrule Length
FK	EK	AK	d	D		B	E	F	M	S	C
FK05	EK05	-	8	5	-0.005 -0.012	4	25	6	M5×0.5	7	3.5
FK06	EK06	-	8	6	-0.005 -0.012	4	28	8	M6×0.75	8	5
FK08	EK08	-	10/12	8	-0.005 -0.012	6	32	9	M8×1	10	5.5
FK10	EK10	AK10	12/14/15	10	-0.006 -0.014	8	36	15	M10×1	11	5.5

FK12	EK12	AK12	14/15/16	12	-0.006 -0.014	10	36	15	M12×1	11	5.5

FK15	EK15	AK15	18/20	15	-0.008 -0.015	12	47	20	M15×1	13	10

FK17	-	-	20/25	17	-0.008 -0.015	15	58	23	M17×1	15	10

FK20	EK20	AK20	25/28/30	20	-0.008 -0.017	17	62	25	M20×1	17	11
FK25	-	-	30/32/36	25	-0.008 -0.017	20	76	30	M25×1.5	20	15
FK30	-	-	36/40	30	-0.008 -0.017	25	72	38	M30×1.5	25	9