STAF Linear Guide
Accuracy Category
| Item | Category | ||||
|---|---|---|---|---|---|
| Normal (N) | High (H) | Precision (P) | Super Precision (SP) | Ultra Precision (UP) | |
| Height tolerance (H) | ±0.1 | ±0.04 | 0 -0.04 | 0 -0.02 | 0 -0.01 |
| Width tolerance (W) | ±0.1 | ±0.04 | 0 -0.04 | 0 -0.02 | 0 -0.01 |
| Height difference (△ H) | 0.03 | 0.02 | 0.01 | 0.005 | 0.003 |
| Width difference (△ W) | 0.03 | 0.02 | 0.01 | 0.005 | 0.003 |
| Deviation of plane C vs. plane A | Please refer to △ C in the diagram below for | ||||
| Deviation of plane D vs. plane B | Please refer to △ D in the diagram below for | ||||
Preload Selection
When rigidity of a linear guide is not strong enough, clearance will exist in between the elements. Preload is the load preliminarily applied to the rolling elements to eliminate a clearance of a linear guide and to increase its rigidity.
| Preload | Clearance/Zero Preload | Light Preload | Medium & Heavy Preload |
|---|---|---|---|
| Conditions | Weak impact 2 Rails in pair Low accuracy Small resistance Small load | Cantilever Single rail Light load High accuracy | Strong impact Strong vibration Heavy machining |
| Applications | Welding machine Chopping machine Feeding mechanism Tool change mechanism Ordinary XY table Packing machine | NC lathe EDM Precise XY table Ordinary Z-axis Industrial robot PCB punching machine | Machine tool NC lathe and milling machine Feeding axis of grinder Tool feeding axis |
Increase of preload will eliminate the vibration and the inertia impact in a reciprocating mechanism. However, increase of preload will increase the internal load and increase the assembly difficulty. Therefore, selection of linear guide must bring into account the preload and balance between the impact of vibration and of preload to life.
Slide Type Coding System
- A
- Block Type
- BGX：Without Cage
- BGC：With Cage
- B
- Height Type
- H：High Assembly
- S：Low Assembly
- X：Special Assembly
- C
- Size：mm
- D
- Length & Flange Type
- BN：Normal Length
- BS：Short Length
- BL：Long Length
- BE：Extra-Long Length
- FN：Flanged Normal Length
- FS：Flanged Short Length
- FL：Flanged Long Length
- FE：Flanged Extra-Long Length
- E
- Block Quantity
- G
- Rail Type
- L：Counterbore Hole
- C：Tapped Hole
- H
- Rail Length
- I
- Precision
- N：Normal
- H：High
- P：Precision
- SP：Super Precision
- UP：Ultra Precision
- J
- Preload Type
- ZF：Clearance
- Z0：No Preload
- Z1：Light
- Z2：Moderate
- Z3：Heavy
- K
- 2 Rails in parallel
- F
- Dust protection category
- Bottom + End Seals
- UU：End Seals
- SS：End Seals + Top + Bottom Seals
- DD：Double Seals
- ZZ：With Scrapper
- KK：Double Seals + Scrapper
- EE：Double Seals + Top Seals + Bottom Seals
- FF：End Seals + Top Seals + Bottom Seals + Scrapper
- GG：Double Seals + Top Seals + Bottom Seals + Scrapper + LS
- F
- Self-Lubricate Assembly (LS)
- AA：End Seals + Bottom Seals + LS
- UA：End Seals + LS
- SA：End Seals + Top Seals + Bottom Seals + LS
- DA：Double Seals + Bottom Seals + LS
- ZA：End Seals + Bottom Seals + Scrapper + LS
- KA：Double Seals + Bottom Seals + Scrapper + LS
- EA：Double Seals + Top Seals + Bottom Seals + LS
- FA：End Seals + Top Seals + Bottom Seals + Scrapper + LS
- GA：Double Seals + Top Seals + Bottom Seals + Scrapper + LS