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Product Series of Automation-Related Precision Ball Screws and Linear Rails – High-Precision Ball Screws

Product Overview

NSK Ball Screw Small Equipment (FS Type)W2521FS-1-C5T20

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Small Equipment (FS Type)/Ball Screw

W2521FS-1-C5T20

Lead20 mm

Product Features

NSK FS series (unfinished shaft ends) standard-stock precision ball screw W2521FS-1-C5T20, shaft dia. 25 mm, lead 20 mm
Accuracy grade C5 (JIS), axial play 0.005 mm or less
Basic load ratings: dynamic Ca 18.6 kN / static C0a 32.6 kN
Effective thread length approx. 2100 mm class (code 21); overall length per NSK dimension tables
Standard stock (W reference number) with short lead times; custom shaft-end machining available

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Product Specifications

Specification	Unit	W2521FS-1-C5T20
Series	-	FS series (unfinished shaft ends)
Shaft diameter	mm	25
Lead	mm	20
Effective thread length class	-	approx. 2100 mm class (code 21) (overall length per NSK tables)
Accuracy grade	-	C5 (JIS)
Axial play	mm	0.005 or less
Preload	-	No preload (clearance type, axial play code T)
Basic dynamic load rating Ca	kN	18.6
Basic static load rating C0a	kN	32.6
Design serial no.	-	1 (NSK internal design number)
Shaft ends	-	Unfinished blank (machined to your drawing)

Product Description

W2521FS-1-C5T20 is an NSK FS series (unfinished shaft ends) standard-stock precision ball screw: 25 mm shaft diameter, 20 mm lead, accuracy grade C5 (JIS), axial play 0.005 mm or less, preload: No preload (clearance type, axial play code T), with basic load ratings of Ca 18.6 kN (dynamic) and C0a 32.6 kN (static). Effective thread length approx. 2100 mm class (code 21); confirm the overall length with NSK dimension tables or with Nahshon. W-reference standard-stock items are standardized with comparatively short lead times.

Not sure about accuracy grades? See our guide: How to choose ball screw accuracy grades (C0–C10) (in Chinese).

Other lengths with the same specification

The FS series with 25 mm shaft dia. × 20 mm lead is also available as: W2513FS-1-C5T20.

Customization

Shaft-end machining to your drawings is available. Add the part number (or your drawing) to the inquiry cart — Nahshon works directly with NSK to confirm specs, quotation and delivery.

Related Files

NSK FS型滾珠螺桿原廠型錄專章.pdfDownload