Castair Beltguard for A2, A3, A4 & A8 Compressors — Part 2BG
The Castair 2BG beltguard is the OEM safety cover for the A2, A3, A4, and A8 compressor models. It measures 24 inches long by 16 inches wide by 5 inches deep, which tells you exactly what it covers: the drive belt and pulley assembly on these mid-range reciprocating compressors. If the original guard has cracked, been lost during a teardown, or is simply missing on a used machine you picked up, this is the correct replacement. Do not run a belt-drive compressor without a guard — OSHA requires it, your insurance expects it, and an exposed belt is a real injury hazard in any busy shop.
Manufacturer page data was not available at the time of this listing. Specifications below are drawn from the product name and part number. Call 866-217-0063 to confirm fitment before ordering.
What This Part Is
Guard Specifications
- Part Number: 2BG
- Dimensions: 24" L x 16" W x 5" D
- Compatible Compressors: Castair A2, A3, A4, and A8 models
- Function: Encloses the drive belt and pulley assembly to prevent contact with rotating components
- Manufacturer: Cast Air / Castair
Why the Beltguard Matters
- Safety compliance: OSHA 29 CFR 1910.219 requires guards on all mechanical power transmission components — a missing beltguard is a citation waiting to happen
- Belt protection: The guard also keeps debris, shop rags, and other objects away from the belt and pulleys, extending belt life
- OEM fit: The 2BG is sized to the A2/A3/A4/A8 compressor frame — generic guards in this size range may not clear the pulley geometry or mount at the correct attachment points
- Insurance and liability: Running machinery with missing guards can void equipment warranties and create employer liability in the event of an injury
Which Compressors This Fits
Compatible Cast Air Models
- A2: Castair A-series compressor, model A2
- A3: Castair A-series compressor, model A3
- A4: Castair A-series compressor, model A4
- A8: Castair A-series compressor, model A8
If you are unsure whether your specific compressor uses the A2/A3/A4/A8 pump configuration, check the model tag on the compressor or call us with the serial number. The 2BG is specific to these models — it will not fit the larger frame compressors in the Cast Air line.
When Does a Shop Need This vs. a Generic Guard?
A generic sheet metal guard in roughly the right size might seem like a cheaper fix, but belt-drive compressors have specific clearance requirements at the pulley ends and specific mounting hole patterns. The Castair 2BG mounts to the existing guard attachment points on the A2/A3/A4/A8 frame without drilling or fabricating new brackets. If cost is the concern, weigh the price of the OEM guard against the time it would take to fabricate or adapt a generic one — and against the risk of a guard that vibrates loose because it does not sit flush.
What's in the Box
- 1x Castair 2BG beltguard (24" x 16" x 5")
- Mounting hardware may or may not be included — confirm when ordering or have M6/M8 hardware on hand for installation
Technical Specifications
- Part Number: 2BG
- Dimensions: 24" L x 16" W x 5" D
- Compatible Models: Castair A2, A3, A4, A8 compressors
- Component Category: Safety guard / belt drive cover
- Manufacturer: Cast Air
- Price: $106.26
Why Buy From OEM Diagnostic Tools?
- Specialist since 2016 in air compressor components and industrial equipment
- Free shipping on qualifying orders
- Free tech support at 866-217-0063 — call before ordering to confirm the 2BG fits your specific compressor configuration
- Full manufacturer warranty on all Cast Air parts
- Honest guidance: We stock the full Castair parts line and can tell you whether this is the right guard for your machine
Call 866-217-0063 for quick answers and help!
