ALPHA PSP-158/114 High-Performance Polisher
The ALPHA PSP-158/114 High-Performance Polisher is Alpha’s new flagship pneumatic polishing tool, designed to revolutionize polishing operations with unmatched power and precision speed control. Engineered for professionals who demand excellence, this high-performance polisher delivers consistent results across a variety of surfaces, ensuring a flawless finish every time.
With its robust pneumatic motor and advanced speed regulation, the PSP-158/114 offers superior control, efficiency, and durability, making it an essential tool for any serious fabricator or craftsman looking to elevate their polishing capabilities.
PSP-158/114 High-Performance Polisher Main Features
- Next Generation Polisher from Alpha®
- High-Performance Industrial Pneumatic Polisher
- Powerful New Motor for Demanding Applications
- Comes With 30′ Kink-Free Twin-Air/Water Hose for Better Maneuverability
- All-Weather Hoses with Flexibility Down To -40°F Or +140°F (-40°C Or +60°C)
- Quarter-Turn Switches for Precise Control
- Central Water-Feed System Delivers Ample Water Regardless of Position
- No-Load RPM- 5,500
- Comes In A Reusable Toolbox
- Silicon Gear Head Cover Provides Cushion and Keeps Hands Warm
- One Year Tool Warranty*
ALPHA PSP-158/114 High-Performance Polisher Videos
Next Gen Air Polisher from Alpha that leads the way
Next Gen Air Polisher Features
PSP-158/114 High-Performance Polisher Specifications
| Feature | Value |
|---|---|
| Model | PSP-158 / PSP-114 |
| Air Pressure | 90 PSI (6.2 Bar) |
| Air Consumption | 21 CFM (594L/min) |
| No Load Speed | 5,500 RPM |
| Weight | 3 lbs (1.37 kgs) |
| Air Inlet | 1/4” BSPT |
| Water Inlet | 1/8” BSPT |
| Spindle | 5/8”-11 / M14-2 |
| Max. HP | 0.70 HP |
| Part No. | Maximum RPM | Recommended For | Threads | Color | Description |
|---|---|---|---|---|---|
| PSP-158 | 5,500 | Wet Polishing, Drilling & Profiling | 5/8″-11 | Yellow | Pneumatic Polisher |
| PSP-114 | 5,500 | Wet Polishing, Drilling & Profiling | M14-2 | Yellow | Pneumatic Polisher |
Equipment Included
| Item | Quantity |
|---|---|
| Air/Water Twin Hose Assembly (30ft / 9.1m) | 1 |
| Rust Inhibitor Oil (3.4oz / 100ml) | 1 |
| Exhaust Hose with Clamp | 1 |
| Quick Connect Ball Valve | 1 |
| Reusable Toolbox | 1 |
ALPHA PSP-158/114 High-Performance Polisher Related Documents
| Document Type | Link |
|---|---|
| Manual | PSP-158 Manual v0323 |
| Parts-Schematic | PSP-158 Parts/Schematic v0924 |
| Flyer | PSP-114 Pneumatic Polisher Flyer |
| Flyer | PSP-158 Pneumatic Polisher Comparison Chart |
| Flyer | New From Alpha 2024 |
| Flyer | PSP-158 Pneumatic Polisher Flyer |
| Other | Warranty Information |
Additional Information
| PartNo | UPC Code | Pkg. Weight (lbs) | Package Dimensions | Commodity Code | Country Of Origin |
|---|---|---|---|---|---|
| PSP-158 | 749173430275 | 10.75 | 13.5in x 11.5in x 3.5in | 8467.11.5090 | Taiwan |
| PSP-114 | 749173430282 | 10.75 | 13.5in x 11.5in x 3.5in | 8467.11.5090 | Taiwan |
Frequently Asked Questions
I have a large enough compressor but PSP-158 gets bogged down time to time. What can I do to improve the operation?
If you connect multiple equipment to a compressed airline, you may be short of air flow available from your compressor.
How much do I need to put rust inhibitor oil in the oil port?
Alpha® suggests to put only a few drops of rust inhibitor oil in the oil port at the end of the shift then slowly turn on the air to lubricate the rotor and cylinder. If you blow compressed air in full, rust inhibitor oil will come out from the exhaust that would defeat the purpose.
Can I use PSP-158 for grinding application?
Yes. You can use the PSP-158 for grinding application. The PSP-158 offers you 5,500 No Load RPM with a lot of torque that enhance grinding speed you enjoy.
What is the warranty on the PSP-158?
One year warranty (See manual for details)
How can I get the parts list and schematic for the PSP-158?
It is in the Related Documents section
Can I use PSP-158 as a dry polisher?
Yes you can. Alpha® will release a new Dry Sanding/Polishing Kit in early Summer 2023 so that we recommend using a new dust guard designed for 4” dry polishing pads along with a HEPA vacuum to make yourself compliant with the OSHA silica rule.
Does Alpha® offer a pneumatic high-speed angle grinder with center water-feed system?
Yes. Alpha® offers the PSC-600 with a Center Water Feed System and a PSG-125 Wet Cutting Kit with Exterior Water Feed System for high-speed cutting, grinding and profile application.





Belkis Desanunes –
Excellent Air Polisher
Belkis Desanunes –
Giancarlo Urdaneta –
Powerful, smooth, and easy to control. The water-feed system works great and makes polishing stone surfaces much cleaner and more efficient.
Giancarlo Urdaneta –