Alpha Aluminum Adapter for Diamond Blades
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Description
Description
Alpha® Aluminum Adapter for Diamond Blades (AAH Series)
The Alpha® AAH Aluminum Adapter lets you mount a dry diamond blade with a 7/8" or 20mm arbor onto any angle grinder with a 5/8"-11 spindle. Machined from lightweight, durable aluminum, the AAH ships ready to use and includes everything required to step a standard blade arbor up to the most common North American grinder thread.
Features
- Steps a 7/8" or 20mm diamond-blade arbor up to a 5/8"-11 grinder spindle
- Lightweight, machined aluminum — lower mass than the brass equivalent
- Designed for DRY cutting blades
- Compatible with any angle grinder that has a 5/8"-11 threaded spindle
- Two arbor options: AAH-7/8 (7/8" arbor) and AAH-20 (20mm arbor)
- Ships with all parts required to install — no separate hardware needed
| Part No. | Type | Arbor | Thread | Use | UPC |
|---|---|---|---|---|---|
| AAH-7/8 | Aluminum Adapter | 7/8" | 5/8"-11 | Dry | 749173450754 |
| AAH-20 | Aluminum Adapter | 20mm | 5/8"-11 | Dry | 749173450761 |
- Confirm your grinder spindle is 5/8"-11 (the standard for North American 4" / 4-1/2" / 5" angle grinders).
- Pick AAH-7/8 if your blade has a 7/8" arbor, or AAH-20 if it has a 20mm arbor.
- Remove the existing flange / lock nut from the grinder spindle.
- Thread the AAH body onto the 5/8"-11 spindle and seat it fully.
- Slide the diamond blade onto the AAH boss and reinstall the outer flange / lock nut per the grinder manufacturer's instructions.
- Verify the blade runs true with no wobble before powering up. Use for DRY cutting only.
20mm — Aluminum Adapter — AAH-20
| Part No. | AAH-20 |
| UPC | 749173450761 |
| Size | 20mm |
| Type | Aluminum Adapter |
| Thread | 5/8"-11 |
| Max RPM | — |
| Recommended For | Dry diamond blade mounting |
| Packaged Weight | 0.10 lbs |
| Package Dimensions | 5" x 3" x 1" |
| Commodity Code | 8466.91.0000 |
| Country of Origin | China |
7/8" — Aluminum Adapter — AAH-7/8
| Part No. | AAH-7/8 |
| UPC | 749173450754 |
| Size | 7/8" |
| Type | Aluminum Adapter |
| Thread | 5/8"-11 |
| Max RPM | — |
| Recommended For | Dry diamond blade mounting |
| Packaged Weight | 0.10 lbs |
| Package Dimensions | 5" x 3" x 1" |
| Commodity Code | 8466.91.0000 |
| Country of Origin | China |
| Property | Detail |
|---|---|
| Application | Mounting 7/8" or 20mm arbor diamond blades onto 5/8"-11 angle grinders |
| Material | Aluminum |
| Thread (grinder side) | 5/8"-11 |
| Blade Use | Dry diamond blades |
| Companion Part | BAH-5/8 brass version (20mm arbor) sold separately for heavier-duty applications |
| Commodity Code | 8466.91.0000 |
| Country of Origin | China |
What does the AAH adapter do?
It adapts a 7/8" or 20mm diamond-blade arbor so the blade can be mounted on any standard 5/8"-11 angle grinder spindle.
What is the difference between AAH-7/8 and AAH-20?
The arbor (center bore) the adapter mates with: AAH-7/8 fits blades with a 7/8" arbor, AAH-20 fits blades with a 20mm arbor. Both have the same 5/8"-11 grinder thread.
Aluminum (AAH) or brass (BAH) — which should I use?
AAH is lighter and more economical; BAH is denser and more durable under repeated heavy use. For most stone-shop and contractor work the aluminum AAH is the standard choice.
Can I use the AAH with a wet blade?
The vendor specifies the AAH for DRY blades. For wet cutting, contact us or your dealer for the appropriate accessory.
Does the adapter come with mounting hardware?
Yes — the AAH ships with all the parts required to install.
No product-specific videos are currently available from the manufacturer or DST.
No data sheets currently published by the manufacturer for this product.
⚠ WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov. Always wear appropriate PPE.
