HJG-S
Enclosed-Tube Single Nut
Single-nut ball screw whose return tube stays inside the nut outside diameter. Catalog symbols FC2, FC2(Z), and FC2B.
HJG-S Enclosed-Tube Single Nut
This HJG-S construction is the single nut with an enclosed external return tube, catalog type C2. Symbols are FC2, FC2(Z), and FC2B. The tube height does not exceed the nut outside diameter, which is larger than on the exposed-tube nut, so the support does not need a notch. The catalog recommends it when radial space is available and a notch is not allowed.
Accuracy, diameter, and efficiency are the HJG-S portfolio: ground C3 and C5, rolled C7, diameters 8–100 mm, DIN 69051, efficiency 90–95%. Grade 3 travel variation over 300 mm is 12 µm and grade 5 is 23 µm in the catalog table. Preload on these symbols is none, oversize ball (Z), or offset lead (B). The exposed-tube single nut is type C1. Double-nut external returns are FYC1D and FYC2D.
Download Catalog Get a QuoteDetailed Parameters
| Family | HJG-S |
| This construction | Single nut, enclosed external tube (type C2) |
| Catalog symbols | FC2, FC2(Z), FC2B |
| Preload on these symbols | None; oversize ball (Z); offset lead (B) |
| Accuracy supplied | Ground C3 and C5; rolled C7 |
| V300p in the catalog | 12 µm grade 3; 23 µm grade 5 |
| Diameter | 8–100 mm family range; see the C2 size table |
| Mounting note | No notch in the nut support; nut outside diameter is larger than type C1 |
| Standard | DIN 69051 |
| Efficiency | 90–95% |
| Catalog | HJG linear-motion catalog PDF |
Available Options & Customizations
- Ground C3 or C5, or rolled C7
- Positioning (P) or travel (T) screw
- Preload: none, offset lead (B), oversize ball (Z), or spacer (D), as the construction allows
- Right- or left-hand thread
- Flange or cylindrical nut where that construction lists it
- Shaft diameter 8–100 mm; exact sizes in the HJG-S tables
HJG-S accuracy
The published line is ground C3 and C5 plus rolled C7, diameters 8–100 mm, single and double nuts, DIN 69051.
HJG-S family
One ball-screw family, with the construction chosen from the catalog.
Ground C3 and C5
Catalog travel variation over 300 mm is 12 µm for grade 3 and 23 µm for grade 5.
Rolled C7
Rolled C7 is the published transport grade.
90–95% efficiency
The catalog states mechanical efficiency of 90–95%.
DIN 69051
Single and double nuts are supplied to DIN 69051.
Diameter 8–100 mm
The published diameter range. Each construction has its own size table.
Specify an HJG-S ball screw
Send diameter, lead, construction, accuracy (C3, C5, or C7), and travel length. We will match the catalog symbol.
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