Airtac LGC Series Cross Roller Guide Rail LGC2R28
The AirTAC Airtac LGC Series Cross Roller Guide Rail LGC2R28 is a crossed roller guide using Ø2.0 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)
- SizeLGC2
- Roller diameterØ2.0 mm
- Rollers in cage28
- 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 LGC2R28
LGC2R28 is a spare roller cage for AirTAC size 2 crossed roller guides: a caged set of twenty-eight 2.0 mm rollers, crossed in alternating orientation so each one carries load through line contact on the hardened V-raceways. Read the code shape honestly - LGC, size digit, R, count - it is a cage and its rollers only, not a rail and not a complete guide, and no rail is supplied. Inside a fitted guide the cage is the component that moves, since the design does not recirculate; it walks along the stainless steel rail and is the part the manufacturer expects to be replaced on its own.
Its rollers are rated 292 N per roller dynamic against 290 N per roller static. Note the reversal: on this crossed roller guide the static figure is the smaller, whereas a ball guide's C0 runs about 1.5 times its dynamic rating - so carry-over sizing habits from recirculating guides do not apply. With twenty-eight rollers the cage sits in the upper half of the size 2 count range, sharing load across many short contact lines. A cage swap costs a fraction of a complete guide, which is precisely why this subassembly exists as a separate order line.
Airtac LGC Series Cross Roller Guide Rail LGC2R28 Technical Specifications
| Model | Airtac LGC Series Cross Roller Guide Rail LGC2R28 |
|---|---|
| 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 | LGC2 |
| Roller diameter | Ø2.0 mm |
| Rollers per cage | 28 |
| Rail material | Stainless steel |
| Travel | Limited by rail length — the cage travels about half the stroke |
| Basic dynamic load rating C | 292 N per roller |
|---|---|
| Basic static load rating C0 | 290 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 LGC2R28
| LGC | LGC Series Crossed Roller Guide. |
|---|---|
| 2 | Size code — sets the roller diameter (Ø2.0 mm). |
| R28 | Cage carrying 28 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, 28 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 LGC2R28 Is Used
Optical test instrument overhaul
During a scheduled overhaul of an optical test instrument, inspecting and replacing the 28-roller cage in the measurement axis restores line-contact smoothness while keeping the instrument's matched rails and calibration baseline intact.
Post-drop inspection recovery
A dropped guide can leave rolling-element indentations in the raceways. If a size 2 axis has been dropped or crashed, fitting this new 28-roller cage after inspecting the rails is the safe route back to rated accuracy.
Toolroom fixture axis rebuild
Rebuilding the reference axis of a toolroom measuring fixture often comes down to the cage: a new 28-roller set, correctly fitted with a dial indicator, returns the slide to the rigidity the fixture was designed around.
Is the Airtac LGC Series Cross Roller Guide Rail LGC2R28 the Right Guide?
Start with the code-shape test: a row-type letter plus a rail length means a complete guide, while a size digit plus R plus a count - as here - means a cage spare for a size 2 guide built around 28 rollers. Keep the count unchanged when replacing, and never combine rails from different sets; accuracy is guaranteed only within a matched set. For a new machine, step across to LSH when travel exceeds roughly half a metre or a sealed recirculating assembly is preferred, and step down to LRM for light-duty, small-envelope slides. An LGC build also demands the maximum-stroke table for rail length (working stroke shorter than the listed maximum), a clearance method chosen at design time - adjusting screws, pressure plate or taper block - and dial-indicator fitting scheduled into the build, since that fitted adjustment sets much of the final accuracy.
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 LGC2R28 FAQ
The cage holds 28 rollers, each 2.0 mm in diameter, rated 292 N dynamic and 290 N static per roller - the unit is N per roller, and no per-guide total is published because capacity scales with roller count in the matched guide. The cage code defines no rail length, row arrangement or accuracy grade; check the complete-guide code it belongs to for those. Ask us to size a specific load rather than multiplying the per-roller figures yourself.
A complete guide such as LGC2A165R28-H carries a row-type letter, a rail length and an accuracy grade, and arrives as the fitted assembly. This code - LGC2R28 - is cage only, with no rail supplied. It exists because the non-recirculating design makes the cage the drift-prone, wear-exposed element, so replacing it alone is the economical repair for a guide whose rails are still sound.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
Request a Quote for Airtac LGC Series Cross Roller Guide Rail LGC2R28
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