HJG-DA / DB
Self-Adjusting 4-Row Guide
HJG-DA and HJG-DB are four-row circular-arc guides. The catalog cites low differential slip and self-adjustment. There is no separate V-groove series.
Self-Adjustment on HJG-DA and HJG-DB
Published rail sizes are 15–65 mm for the family. HJG-DA tables list 15 through 65 mm and also 85 mm. HJG-DB is 45 and 55 mm. Preload is H0–H3. Accuracy is P, H, and SP. The raceway in the catalog is the circular-arc profile, not a V-groove wheel rail.
The HJG-D catalog describes the four-row circular-arc contact as having low differential slip, self-adjustment, and high load capacity. HJG-DA and HJG-DB are the ball series built that way. Equal load in four directions comes from the 45° contact angle.
Get a QuoteDetailed Parameters
| Series | HJG-DA and HJG-DB |
| Contact | Four-row circular arc, 45° |
| Catalog properties | Low differential slip, self-adjustment, high load capacity |
| Accuracy grades | P, H, SP |
| Preload | H0, H1, H2, H3 |
| Rail sizes | HJG-DA 15–65 mm published, tables also 85 mm; HJG-DB 45 and 55 mm |
| Not in this catalog | A separate V-groove wheel guide |
| Catalog | HJG linear-motion catalog PDF |
Available Options & Customizations
- Accuracy grades P, H, and SP
- Block form and hole type from the catalog code
- Standard or extended block where the series lists suffix L
- Preload class listed for that series
- Rail length within the catalog G limits
- Full dimensions in the HJG catalog PDF
Circular arc, not a V-groove series
Self-adjustment in the Songju catalog is a property of HJG-DA and HJG-DB, not a second product line.
Equal load, four directions
A 45° contact angle shares the load across four rows of balls.
Catalog block forms
High flange, low flange, or rectangle, with threaded or plain holes.
Preload H0–H3
Micro through heavy preload, matched to impact and accuracy.
Seals and oil cup
End seals, scrapers, and an oil cup with a flow path.
Low-noise return
The resin return path is designed for smooth, quiet travel.
Ground raceways
Raceway hardness is not less than HRC 58.
Specify HJG-DA or HJG-DB
Send rail size, block form, preload, and accuracy. We will quote the four-row circular-arc guide.
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