Airtac LGC Series Cross Roller Guide Rail LGC3R40
The AirTAC Airtac LGC Series Cross Roller Guide Rail LGC3R40 is a crossed roller guide using Ø3.0 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 asRoller cage assembly (spare part)
- SizeLGC3
- Roller diameterØ3.0 mm
- Rollers in cage40
- 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 LGC3R40
LGC3R40 is the roller cage for an AirTAC size 3 crossed roller guide, supplied on its own: 40 rollers of 3.0 mm diameter in a caged, crossed arrangement. No rail is included and it is not a complete guide - it is the parts-table subassembly you order when the cage is the worn item and the matched rails are still good. The non-recirculating design means travel is fixed by the rail length already installed, so this cage simply reinstates the original motion in the same stroke envelope.
Per roller, this size carries manufacturer ratings of 640 N dynamic and 610 N static. The 40 rollers give more shared line contacts than smaller cages of the same size, which is one reason capacity scales with the roller count - a figure the catalogue deliberately publishes only per roller. Fitting the new cage means re-centring it through the stroke and re-checking with a dial indicator, so plan the same fitted, indicator-guided process as the original build.
Airtac LGC Series Cross Roller Guide Rail LGC3R40 Technical Specifications
| Model | Airtac LGC Series Cross Roller Guide Rail LGC3R40 |
|---|---|
| Series | LGC Series Crossed Roller Guide |
| Supplied as | Roller cage assembly (spare part) |
| Construction | Crossed precision rollers in a cage, NON-recirculating, line contact |
| Size code | LGC3 |
| Roller diameter | Ø3.0 mm |
| Rollers per cage | 40 |
| Rail material | Stainless steel |
| Travel | Limited by rail length — the cage travels about half the stroke |
| Basic dynamic load rating C | 640 N per roller |
|---|---|
| Basic static load rating C0 | 610 N per roller |
| 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, matched by the pairing code |
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. This item is a roller cage only — neither a rail nor a complete guide.
Model Code: Airtac LGC Series Cross Roller Guide Rail LGC3R40
| LGC | LGC Series Crossed Roller Guide. |
|---|---|
| 3 | Size code — sets the roller diameter (Ø3.0 mm). |
| R40 | Cage carrying 40 rollers. |
| -H / -P | Accuracy grade: H high, P precision. |
What Is In The Box
| This order | Roller cage assembly (spare part) |
|---|---|
| Rail | No — not supplied with this item |
| Rollers and cage | Yes, 40 rollers |
This is the cage-and-rollers subassembly sold as a spare. It is NOT a rail and NOT a complete guide. 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 LGC3R40 Is Used
Equipment field service
A field engineer servicing X-ray equipment or optical instruments on customer sites carries size 3 cages so a worn roller set can be replaced without hauling the machine back to base.
Automated test handler
The short-travel axis of a component test handler keeps its original rails and gains new life from a fresh 40-roller cage plus a re-check of clearance and preload.
Production line spares kit
Plant stores list LGC3R40 among critical spares for high-rigidity slide axes, so a failed cage does not idle a production line while parts are sourced.
Is the Airtac LGC Series Cross Roller Guide Rail LGC3R40 the Right Guide?
Confirm first that this is the correct form: LGC3R40 is a cage spare with no rail, so it suits a repair where the existing rails remain within tolerance - if they do not, buy a complete matched set, since accuracy is controlled set by set and different sets must never be combined. Check size 3 (3.0 mm rollers) and the 40-roller count against the cage being replaced. Where the application needs travel longer than the roughly half metre that stocked LGC rails reach, move to recirculating LSH; where the load is modest and space minimal, LRM is the leaner choice. For new LGC installations, decide rail length from the maximum-stroke table with the working stroke set slightly shorter, take accuracy grade H from stock or P to order, choose between adjusting screws, a pressure plate or a taper block for clearance and preload, and reserve build time for the dial-indicator setup.
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 LGC3R40 FAQ
This is a size 3 crossed roller cage with 40 rollers, each 3.0 mm in diameter, rated 640 N dynamic and 610 N static per roller. The cage code defines no row type, rail length or accuracy grade, and it comes with no rail. A complete guide's capacity scales with the number of rollers, but no per-guide total is published - size from the per-roller figures or ask us to verify the duty.
When the rails are undamaged, the cage is usually all that needs replacing - it is the least expensive item in a crossed roller guide, a fraction of the cost of a full set. The cage walks about half the stroke with the slide and is the part most exposed to drift and drop damage, so holding a spare is cheap insurance. Remember that a dropped guide can bruise the raceways; if a drop is suspected, inspect the rails before reusing them.
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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 LGC3R40
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