Airtac LGC Series Cross Roller Guide Rail LGC6B250R25-H
The AirTAC LGC Series Cross Roller Guide Rail LGC6B250R25-H is a crossed roller guide using Ø6.0 mm precision rollers. Rollers are held in a cage in alternating orientation between hardened V-raceways, giving line contact instead of point contact — much higher rigidity and accuracy than a ball guide of similar size. It does NOT recirculate, so travel is set by rail length and the cage travels about half the stroke.
- SeriesLGC
- Supplied asComplete guide set
- SizeLGC6
- Roller diameterØ6.0 mm
- Rollers in cage25
- Rail length50 mm
- AccuracyH — high grade
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac LGC Series Cross Roller Guide Rail LGC6B250R25-H
The LGC6B250R25-H is a complete four-row crossed roller guide from AirTAC's LGC series: a size 6 set built around 6.0 mm hardened cylindrical rollers held in a cage between the V-raceways of a 250 mm stainless steel rail. Because the rollers sit at crossed angles and meet each race along a line rather than at a point, the guide resists deflection far better than a ball guide of comparable size. Nothing recirculates: every roller stays in its cage for life, so travel stops where the rail ends instead of running endlessly.
The catalogue rates these rollers at 3175 N per roller dynamic and 2550 N per roller static, and this cage carries 25 of them, so total capacity grows with the roller count through load distribution rather than being a fixed per-guide figure we publish. The four-row B arrangement is the more symmetric layout in the range, a good match for loads arriving from several directions. Two practical points follow from the design: the cage travels with the slide by roughly half the stroke, so rail length must be taken from the maximum-stroke table with the working stroke set shorter, and the set is fitted and adjusted in place with a dial indicator rather than bolted on.
Airtac LGC Series Cross Roller Guide Rail LGC6B250R25-H Technical Specifications
| Model | Airtac LGC Series Cross Roller Guide Rail LGC6B250R25-H |
|---|---|
| Series | LGC Series Crossed Roller Guide |
| Supplied as | Complete guide set |
| Construction | Crossed precision rollers in a cage, NON-recirculating, line contact |
| Size code | LGC6 |
| Roller diameter | Ø6.0 mm |
| Rollers per cage | 25 |
| Rail material | Stainless steel |
| Travel | Limited by rail length — the cage travels about half the stroke |
| Rail length | 50 mm |
| Basic dynamic load rating C | 3175 N per roller |
|---|---|
| Basic static load rating C0 | 2550 N per roller |
| Accuracy grade | H — high grade |
| Mounting screws | Per catalogue tightening-torque table |
| Lubrication | Per catalogue; adjust clearance and preload before use |
| Interchangeability | LGC carriages fit LGC rails of the same model |
Specifications follow the official AirTAC LGC catalogue. Load ratings are stated PER ROLLER, not per guide — total capacity depends on how many rollers the cage carries, which is why the roller count is part of the order code. Maximum stroke and tightening torques are given in the catalogue tables; ask us for the figure for your size.
Model Code: Airtac LGC Series Cross Roller Guide Rail LGC6B250R25-H
| LGC | LGC Series Crossed Roller Guide. |
|---|---|
| 6 | Size code — sets the roller diameter (Ø6.0 mm). |
| A / B | Row arrangement: A three-row, B four-row. |
| 50 | Rail length in mm. |
| R25 | Cage carrying 25 rollers. |
| -H / -P | Accuracy grade: H high, P precision. |
What Is In The Box
| This order | Complete guide set |
|---|---|
| Rail | Yes, 50 mm |
| Carriage | Yes |
Rail and carriage(s) supplied together, matched as a set. If you are not sure which form you need, send us the machine or the original part number and we will confirm it before you order.
Where the Airtac LGC Series Cross Roller Guide Rail LGC6B250R25-H Is Used
PCB microvia drilling
A drilling spindle stepping between board positions needs short, rapidly repeated moves with zero deflection at the tool point. The line-contact rollers hold the slide on line, provided the rail is long enough that the cage never approaches its end.
Optical test instrument
Lens and sensor metrology setups demand straight, repeatable motion over a fixed travel. The stiff crossed-roller geometry keeps the optical path stable, and an H-grade set trimmed by careful fitted adjustment is usually accurate enough for the bench.
Optical bench alignment carriage
Carrying filters or mirror mounts along an optical bench is a finite, precise stroke. The non-recirculating cage keeps all 25 rollers engaged throughout, so plan the layout so its half-stroke walk stays comfortably inside the 250 mm rail.
Is the Airtac LGC Series Cross Roller Guide Rail LGC6B250R25-H the Right Guide?
Choose LGC when the duty is short travel with high rigidity and the guide can be assembled and adjusted on the machine itself. Step across to AirTAC LSH when travel must run beyond roughly half a metre or a sealed, bolt-on recirculating unit is preferred; step down to LRM when the load is light and the envelope tight. Before ordering, work the checklist: confirm the form is a complete guide rather than a spare cage; select the size by roller diameter and cage roller count together; fix the row arrangement (here four-row B); take the rail length from the maximum-stroke table and keep the working stroke slightly shorter; pick the accuracy grade (H is the standard offering, P available to order); and decide how clearance will be tuned, because adjusting screws, a pressure plate and a taper block give rising rigidity and each shapes the surrounding machining. Finally, reserve build time for the dial-indicator setup and screw torquing. Accuracy is controlled as a matched set, so never combine rails from different sets, and do not chase stiffness with excessive preload, which can damage the raceway or twist a rail.
Quick checklist
- ✓ Complete set, carriage only, or rail only?
- ✓ Worst-case moment, not just straight load
- ✓ Travel length and mounting space
- ✓ Stroke shorter than the rail allows for cage travel
- ✓ Clearance method: screws, plate or taper block
- ✓ Pairing code, if replacing a part
Installation & Maintenance Notes
- check Mounting surface must be ground or finish-milled.
- check Torque the rail screws per the recommended figures, in sequence.
- check Keep the mounting corner radius inside the stated R maximum.
- check Centre the roller cage on the rail during assembly.
- check Adjust with a dial indicator over the full stroke.
- check Never mix rails from different sets — accuracy is matched per set.
- check Installation by qualified personnel per AirTAC docs.
Airtac LGC Series Cross Roller Guide Rail LGC6B250R25-H FAQ
Size 6 means 6.0 mm diameter rollers, rated by the catalogue at 3175 N per roller dynamic and 2550 N per roller static - note the static figure is the smaller, the reverse of a ball guide where C0 dominates. The set comprises a 250 mm stainless steel rail, a four-row (B) arrangement, a cage of 25 rollers and H (high) accuracy. Total guide capacity scales with the roller count through load distribution, so no single per-guide number is published; send us the load case and we will size it.
Less than 250 mm. Because the rollers never recirculate, the cage rides with the slide and moves by about half the stroke, so the rail must be chosen from the manufacturer's maximum-stroke table and the working stroke set slightly shorter than that maximum. If the cage drifts, from high acceleration, vibration or uneven preload, running several full strokes brings it back near centre; on a vertical axis leave extra margin, since gravity accumulates the drift in one direction.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac LGC Series Cross Roller Guide Rail LGC6B250R25-H
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