NSK

The full NSK ball screw range — from standard series to customized end machining. Nahshon provides one-stop spec selection, special machining coordination and lead-time management.

Ball Screw

Series Overview

The NSK ball screw range covers machine-tool (SA/SS), small-equipment (conventional FA/FS), miniature fine-lead (MA/MS), stainless (KA) and transfer (VFA/RMA/R) models, plus the separate Compact FA standard-stock family (PSS/USS/FSS).

Customization — Nahshon's Core Value

Spec selection based on load, travel, speed and accuracy
Custom end machining to your drawings, matching your bearing housings and motors
Lead-time coordination directly with the factory, including urgent orders

Typical Applications

Machine tool feed axes
Semiconductor and panel equipment positioning
Automation lines and special-purpose machines
Metrology and medical devices

Selection & Support

Add your travel, load, speed and mounting conditions (or drawings) to the inquiry cart — our engineers will finalize the spec and quote with the factory.

Understanding Accuracy Grades (C0–C5 / Ct7–Ct10)

Under JIS B 1192, ball screw lead accuracy falls into two systems: the C series for positioning and the Ct series for transport. NSK precision-ground ball screws come in five grades — C0, C1, C2, C3 and C5 (there is no C4) — where a smaller number means higher accuracy; rolled ball screws come in Ct7 and Ct10 (no C6/C9). In the table below, υ₃₀₀ is the permissible travel variation over any 300 mm of stroke, the most intuitive figure for comparing grades (values from NSK General Catalog E3162, Tables 1.3/1.4, pages B37–B38):

Grade	Travel variation υ300 (µm / 300 mm)	Process	Typical applications
C0	3.5	Precision ground	Ultra-precision machine tools, laser processing, nanometer-level positioning stages
C1	5	Precision ground	High-precision machine tools, optical equipment
C2	7	Precision ground	Precision machine tools, high-end metrology equipment
C3	8	Precision ground	Semiconductor/panel equipment, metrology instruments (most common precision grade)
C5	18	Precision ground	General automation positioning, industrial machinery feed axes
Ct7	52	Rolled	Transfer and conveying mechanisms (standard grade of the Compact FA series)
Ct10	210	Rolled	General transfer and open/close mechanisms with low positioning demands

Selection guide: the first question is the application — for feed and positioning axes that must guarantee accuracy, choose from the C series; for transfer and handling mechanisms, the Ct series is the appropriate fit. Typical correspondence: C3 for semiconductor, panel and metrology equipment; C5 for general automation positioning; Ct7 for transfer mechanisms (the NSK Compact FA series is built to Ct7 as standard, axial play 0.010 mm or less). Note that cumulative travel error (±ep) grows with thread length — e.g. at 1,300 mm, C3 is ±29 µm vs. C5 ±54 µm (E3162 p. B39). Share your travel and positioning requirements with the Nahshon engineering team and we will help you select the grade that best balances performance and cost.