Structural Features

The nut body is typically made of high-strength alloy steel or an engineering plastic composite.
NSFI
The internal recirculation design allows the steel balls to circulate through the nut's internal return path. Its compact structure and small size make it suitable for installations with limited space and medium-to-high-speed operation.
NSFNI
The improved internal recirculation design optimizes the steel ball return path while maintaining a compact size, reducing friction and noise. It is suitable for precision equipment requiring smoother operation and lower noise levels.

Symbol Meaning

1. NSFI
N: Indicates Nut.
S: Indicates Standard Series.
F: Indicates Flange-Type Nut.
I: Indicates Internal Circulation. The steel balls circulate through the nut's internal circulation components, resulting in a compact design.
2. NSFNI
N: Indicates Nut.
S: Standard Series.
F: Flange-Type.
N: Indicates New/Reinforced Design or Optimized Design, typically indicating improvements in the circulation method or structure.
I: Internal Circulation.

Matching Screw model
1204# 1604# 1605# 2005G 2505G 2510# 3205G 3210# 4010# 5010#
Notes:
#: SCR heavy-duty screw,
*: SSR light-duty silent screw,
G: Both types available.