HJG-DB
4-Row Ball Linear Guide
HJG-DB is the four-row ball guide catalogued in sizes 45 and 55 mm, with a mounting pitch that differs from HJG-DA at the same nominal size.
HJG-DB 4-Row Ball Linear Guideway
HJG-DB uses the same four-row circular-arc ball construction as HJG-DA: 45° contact, equal load in four directions, resin return, end seals, scrapers, and an oil cup. The catalog lists HJG-DB in nominal sizes 45 and 55 mm.
At size 45 the rail mounting pitch F is 105 mm on HJG-DB, against 100 mm on HJG-DA. Block codes are the same family: high flange A, low flange B, rectangle C, threaded or plain holes, and extended block suffix L. Preload is H0 to H3. Accuracy grades are P, H, and SP. Use the catalog tables when the mounting pitch must match an existing bed.
Get a QuoteDetailed Parameters
| Series | HJG-DB (HJG-D family, ball) |
| Rolling element | Four rows of balls, circular-arc contact |
| Contact angle | 45°, equal load in four directions |
| Accuracy grades | P, H, SP |
| Preload | H0 micro, H1 light, H2 medium, H3 heavy |
| Rail sizes | 45 mm and 55 mm |
| Mounting pitch | Size 45: hole pitch F = 105 mm (HJG-DA size 45 is 100 mm) |
| Block forms | High flange A, low flange B, rectangle C; extended block suffix L |
| Raceway hardness | Not less than HRC 58 |
| Lubrication and sealing | Oil cup and flow path; end seals and scrapers |
| Catalog | Dimensions and loads in the HJG linear-motion catalog |
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
Why HJG-DB
Choose HJG-DB when the axis is 45 or 55 mm and the bed is drilled to the HJG-DB mounting pitch.
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 an HJG-DB guide
Send the rail size, hole pitch, block form, preload, and accuracy grade. We will confirm HJG-DB or HJG-DA from the catalog.
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