Chicago Pneumatic Angle Grinder | CP3650-120AB45 | 12000 RPM | 4-1/2" Wheel Size

Built for 4-1/2" wheel grinding, cutting, and surface preparation, the Chicago Pneumatic CP3650-120AB45 angle grinder delivers 12,000 RPM free speed for fast work with compatible abrasive wheels. Its 2.4 HP / 1800 W governed pneumatic motor helps maintain wheel speed under load, which matters when removing weld seams, cleaning edges, cutting body panels, or preparing metal surfaces for repair and finishing. The 4-1/2" / 115 mm wheel capacity gives operators a compact wheel size for tighter access than larger 7" grinders, while the 5/8"-11 UNC spindle thread matches common North American grinder wheel hardware when the accessory, guard, and speed rating are correct.

The CP3650-120AB45 is part of Chicago Pneumatic's CP3650 Series, built for productive pneumatic grinding with safety-focused handling features. The keyless pull-and-turn swiveling guard allows quick guard repositioning as the grinding or cutting angle changes, while the spindle lock button helps speed up abrasive disc changes. A steel swiveling air inlet helps reduce hose drag around fixtures and workpieces, and the aluminum body with composite over-sleeve gives the operator a manageable grip surface during repeated grinding, cutting, and surface preparation work.

Type: Angle Grinder | Series: CP3650 | Model: CP3650-120AB45 | SKU: 6151607840 | Free Speed: 12,000 RPM | Power: 2.4 HP / 1800 W | Max Wheel Capacity: 4-1/2" / 115 mm | Spindle Thread: 5/8"-11 UNC | Auto Balancer: No | Air Consumption at Free Speed: 37.3 CFM / 17.6 l/s | Air Consumption at Load: 63.1 CFM / 29.8 l/s | Air Inlet: 3/8" BSP | Working Pressure: 90 PSI / 6.3 bar | Min. Hose Diameter: 1/2" / 13 mm | Length: 9.74" / 247.5 mm | Height: 4.02" / 102 mm | Width: 5.12" / 130 mm | Side to Center: 1.34" / 34 mm | Weight: 4.85 lb / 2.2 kg | Sound Pressure: 90 dB(A) | Sound Power: 101 dB(A) | Vibration Level: 7.0 m/s² | Vibration Uncertainty K: 2.1 m/s² | Guard Rotation: 360° | Guard Positions: 15 | Guard Type: Keyless Pull and Turn | Main Material: Aluminum with Composite Over-Sleeve | Spindle Lock: Yes | Starting System: Safety Lever

Features:

• 12,000 RPM free speed supports fast grinding and cutting with compatible 4-1/2" abrasive wheels.
• 2.4 HP / 1800 W governed motor helps maintain productive wheel speed during surface preparation, weld cleanup, and cutting tasks.
• 4-1/2" / 115 mm wheel capacity provides a compact abrasive format for access around panels, brackets, frames, and fabricated parts.
• 5/8"-11 UNC spindle thread supports compatible wheel hardware when the correct guard and accessory are selected.
• Keyless pull-and-turn swiveling guard offers 360° rotation with 15 guard positions for faster guard adjustment.
• Spindle lock button allows faster abrasive disc changes and helps reduce downtime between grinding or cutting operations.
• Steel swiveling air inlet helps reduce hose pull while the tool is moved around workpieces and fixtures.
• Aluminum body with composite over-sleeve provides a durable tool housing with a more manageable grip surface.

Applications:

• Metal fabrication: grinding weld seams, cleaning cut edges, removing burrs, and preparing steel or aluminum parts for finishing.
• Body shop and vehicle repair: cutting panels, cleaning brackets, grinding repair sections, and preparing metal before refinishing.
• Industrial maintenance and MRO: surface cleanup, rust removal, wheel-based cutting, and repair work on guards, covers, fixtures, and plant hardware.
• Frame and equipment service: grinding mounts, supports, tabs, and repair components where a compact 4-1/2" wheel is preferred.
• Workshop and field service: pneumatic grinding and cutting for users with a compressor system capable of supporting the tool's air demand.

FAQs:

• Q: What wheels can be used with the CP3650-120AB45?
  A: Use compatible 4-1/2" / 115 mm grinding or cutting wheels that match the 5/8"-11 UNC spindle setup, guard configuration, and work application. The wheel's maximum operating speed must equal or exceed the grinder's 12,000 RPM free speed.
• Q: What air supply does this angle grinder require?
  A: Chicago Pneumatic lists 63.1 CFM / 29.8 l/s air consumption at load and 37.3 CFM / 17.6 l/s at free speed. Use a compressed-air system that can maintain 90 PSI / 6.3 bar at the tool through a minimum 1/2" / 13 mm hose.
• Q: How is the CP3650-120AB45 different from a 7" angle grinder?
  A: The CP3650-120AB45 uses a 4-1/2" wheel, making it more compact for tighter access and smaller grinding or cutting paths. A 7" grinder covers more surface area per pass but requires more space around the workpiece.
• Q: What does the keyless swiveling guard do?
  A: The keyless pull-and-turn guard lets the operator reposition the guard without a separate tool. This helps keep the guard aligned correctly as the tool angle changes during grinding or cutting.
• Q: Does this model have an auto balancer?
  A: No. The CP3650-120AB45 is listed without an auto balancer. For applications where lower vibration is a priority, compare it with CP3650 variants that include an auto balancer.

Looking for more information about Chicago Pneumatic Angle Grinder? Click here to view the Catalog.

For help selecting the correct Chicago Pneumatic Angle Grinders for your assembly application, call (800) 608-5210 or email info@intlairtool.com