Airtac LGC Series Cross Roller Guide Rail LGC4R36
The AirTAC Airtac LGC Series Cross Roller Guide Rail LGC4R36 is a crossed roller guide using Ø4.0 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)
- SizeLGC4
- Roller diameterØ4.0 mm
- Rollers in cage36
- 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 LGC4R36
This is the spare roller cage from AirTAC's LGC crossed roller guide range, size 4, carrying 36 rollers of 4.0 mm diameter. The ordering code LGC4R36 describes only the cage-and-roller assembly: no rail is supplied, and it is neither a rail-only item nor a complete guide. The manufacturer lists it separately precisely because a cage can be renewed on its own - a dropped guide, a drifted cage or contaminated rollers need not write off the whole matched rail set.
Each roller is rated 1230 N per roller dynamic and 1170 N per roller static, with total capacity growing through roller count and load distribution in ways the catalogue does not publish, so route specific sizing questions to us. Because LGC does not recirculate, travel is set by the rail length of the guide this cage belongs to, and the cage itself walks along that rail by about half the slide's travel. Fitting a fresh cage is a bench job done with a dial indicator and a proper preload check, not a swap-and-go.
Airtac LGC Series Cross Roller Guide Rail LGC4R36 Technical Specifications
| Model | Airtac LGC Series Cross Roller Guide Rail LGC4R36 |
|---|---|
| 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 | LGC4 |
| Roller diameter | Ø4.0 mm |
| Rollers per cage | 36 |
| Rail material | Stainless steel |
| Travel | Limited by rail length — the cage travels about half the stroke |
| Basic dynamic load rating C | 1230 N per roller |
|---|---|
| Basic static load rating C0 | 1170 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 LGC4R36
| LGC | LGC Series Crossed Roller Guide. |
|---|---|
| 4 | Size code — sets the roller diameter (Ø4.0 mm). |
| R36 | Cage carrying 36 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, 36 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 LGC4R36 Is Used
Coordinate measuring stage repair
A measuring machine's short-travel stage depends on cage position for its repeatability. When the 36-roller cage of a size 4 guide shows wear or will not stay centred, a replacement cage plus a dial-indicator re-adjustment returns the stage to service.
Optical test instrument rebuild
Lens and sensor test benches use crossed roller slides for sub-millimetre travels. During a rebuild, fitting a new LGC4R36 cage into the existing guide, centring it over several strokes and re-checking alignment with indicators restores the smooth, rigid motion the optics need.
Vision inspection station maintenance
The focus axis of a machine-vision inspection station makes constant short moves under an eccentric camera load, a classic cause of cage drift. Keeping a size 4 cage spare on the shelf turns a drifted or damaged cage into a fast, low-cost fix.
Is the Airtac LGC Series Cross Roller Guide Rail LGC4R36 the Right Guide?
Start by checking that you actually need a cage: if the slide is being built new, the order you want is a complete guide code carrying row arrangement (A three-row or B four-row), rail length and accuracy grade. LGC4R36 exists for servicing - match the 36-roller count and the size 4 roller diameter to the cage already in the guide, and treat rails and cage as one matched set that must never be mixed between sets.
Sizing a complete guide from scratch: pick the size by roller diameter and cage roller count together, take the rail length from the manufacturer's maximum-stroke table and set the working stroke slightly shorter to allow for cage travel, and choose the clearance method early - adjusting screws, a pressure plate or a taper block - since it affects the surrounding machining. Where travel is long or a sealed recirculating bolt-on guide is preferred, look at LSH; for light duty in a tight envelope, LRM is the smaller answer.
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 LGC4R36 FAQ
It is a size 4 cage: rollers of 4.0 mm diameter, 36 of them in the cage. Ratings are quoted per roller - 1230 N dynamic and 1170 N static per roller, with the static figure slightly below the dynamic one, unlike a ball guide. The code contains no row type, no rail length and no accuracy grade; those belong to the complete guide it was bought to match, and accuracy on LGC is controlled as a matched set, so never mix rails between sets. We do not publish a per-guide total because it depends on roller count and load distribution - ask us with your exact guide code.
Neither. LGC4R36 is the cage-and-roller subassembly only - no rail is supplied, and it cannot function on its own. The manufacturer sells it separately because it is the natural service part: rollers and cage can wear, drift or be damaged while the matched rails remain sound, and a new cage costs a fraction of a complete guide. To rebuild the slide, fit the cage into the existing guide, centre it over several full strokes, and re-adjust clearance and preload with a dial indicator before returning the machine to service.
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 LGC4R36
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