PBH Linear Guide FAQ
Everything you need to know — replacement, selection, installation & troubleshooting
PBH guides are fully interchangeable with Hiwin within matching series and size — blocks and rails can be cross-used directly.
PBH PGW..CC ↔ Hiwin HGW..CC
To identify your replacement: share brand, part number, rail width, hole pitch, block width, hole distance, assembled height, and photos.
| SIZE | BLOCK | RAIL | C (kN) | C₀ (kN) |
|---|---|---|---|---|
| 15 | PGH15CA | PBR15 | 11.4 | 25.3 |
| 20 | PGH20CA | PBR20 | 17.75 | 37.85 |
| 25 | PGH25CA | PBR25 | 26.5 | 59.2 |
| 30 | PGH30CA | PBR30 | 38.7 | 83.0 |
C = dynamic load (moving) | C₀ = static load (stationary / shock)
Application: 50 kg horizontal load, 2 rails, 2 blocks per rail, load centrally placed.
Convert to Newtons
50 kg × 9.8 = 490 N
Distribute load
490 N ÷ 4 blocks = 122.5 N = 0.12 kN per block
Check Size 15
C = 11.4 kN ÷ 0.12 = 93x safety factor
Choose block type
PGH15CA or PGW15CC — based on mounting
Do
Best practices for installation
- • Clean, flat, machined surface
- • Tighten bolts evenly in sequence
- • Mount reference rail first
- • Check parallelism at both ends
- • Lubricate before first run
Don't
Common mistakes to avoid
- • Force, hammer, or bend the rail
- • Mount on dirty / uneven surfaces
- • Run without lubrication
- • Remove block carelessly from rail
- • Expose to chips, coolant, sparks
Lubrication Schedule
Grease lubrication is standard. As a baseline:
Shorten interval in dusty, high-speed, or high-duty environments.
Maximum Rail Length
Single piece: 4 metres. For longer travel, use a butt joint (jointed rail) arrangement.
Even Load Design
Equal capacity in all 4 directions — radial, reverse, lateral.
Chrome Steel
Case hardened HRC 58–62 for maximum wear resistance.
Error Compensation
Absorbs minor installation misalignment automatically.
Hiwin Drop-In
PGH↔HGH, PGW↔HGW. Test on your existing rail.
PBH Linear Guide FAQ
Everything you need to know — replacement, selection, installation & troubleshooting
PBH guides are fully interchangeable with Hiwin within matching series and size — blocks and rails can be cross-used directly.
PBH PGW..CC ↔ Hiwin HGW..CC
To identify your replacement: share brand, part number, rail width, hole pitch, block width, hole distance, assembled height, and photos.
| SIZE | BLOCK | RAIL | C (kN) | C₀ (kN) |
|---|---|---|---|---|
| 15 | PGH15CA | PBR15 | 11.4 | 25.3 |
| 20 | PGH20CA | PBR20 | 17.75 | 37.85 |
| 25 | PGH25CA | PBR25 | 26.5 | 59.2 |
| 30 | PGH30CA | PBR30 | 38.7 | 83.0 |
C = dynamic load (moving) | C₀ = static load (stationary / shock)
Application: 50 kg horizontal load, 2 rails, 2 blocks per rail, load centrally placed.
Convert to Newtons
50 kg × 9.8 = 490 N
Distribute load
490 N ÷ 4 blocks = 122.5 N = 0.12 kN per block
Check Size 15
C = 11.4 kN ÷ 0.12 = 93x safety factor
Choose block type
PGH15CA or PGW15CC — based on mounting
Do
Best practices for installation
- • Clean, flat, machined surface
- • Tighten bolts evenly in sequence
- • Mount reference rail first
- • Check parallelism at both ends
- • Lubricate before first run
Don't
Common mistakes to avoid
- • Force, hammer, or bend the rail
- • Mount on dirty / uneven surfaces
- • Run without lubrication
- • Remove block carelessly from rail
- • Expose to chips, coolant, sparks
Lubrication Schedule
Grease lubrication is standard. As a baseline:
Shorten interval in dusty, high-speed, or high-duty environments.
Maximum Rail Length
Single piece: 4 metres. For longer travel, use a butt joint (jointed rail) arrangement.
Even Load Design
Equal capacity in all 4 directions — radial, reverse, lateral.
Chrome Steel
Case hardened HRC 58–62 for maximum wear resistance.
Error Compensation
Absorbs minor installation misalignment automatically.
Hiwin Drop-In
PGH↔HGH, PGW↔HGW. Test on your existing rail.