Chicago Pneumatic Extended Shaft Straight Die Grinder | CP3550-180ES | 18000 RPM | 1/4" (6 mm) Collet

Built for extended-reach material removal, deburring, and finishing work, the Chicago Pneumatic CP3550-180ES straight die grinder delivers 18,000 RPM free speed for fast cutting with carbide burrs, mounted points, and compatible abrasive accessories. The extended shaft helps the operator reach deeper into cavities, castings, weldments, and recessed work areas where a standard-length grinder may not provide enough access. Powered by a 1.5 HP / 1100 W governed motor, this grinder helps maintain abrasive speed under load, which is important when blending welds, cleaning castings, opening holes, or removing sharp edges in production and maintenance environments.

The CP3550-180ES uses a 1/4" / 6.0 mm collet for holding compatible burrs and mounted abrasive tools, with a rear exhaust that directs air away from the work area. A safety lever starting system helps reduce accidental start risk, while the spindle lock button supports faster accessory changes. The aluminum body with composite over-sleeve keeps the tool manageable at 3.09 lb / 1.4 kg, and the 14.37" / 365 mm overall length gives added reach for fabrication, foundry, metalworking, and industrial MRO tasks.

Type: Extended Shaft Straight Die Grinder | Model: CP3550-180ES | SKU: 6151602360 | Free Speed: 18,000 RPM | Power: 1.5 HP / 1100 W | Collet Size: 1/4" / 6.0 mm | Air Consumption at Load: 55 CFM / 26 l/s | Air Consumption at Free Speed: 36 CFM / 17 l/s | Air Inlet: 3/8" NPT | Working Pressure: 90 PSI / 6.3 bar | Min. Hose Diameter: 1/2" / 13 mm | Length: 14.37" / 365 mm | Height: 2.05" / 52 mm | Weight: 3.09 lb / 1.4 kg | Sound Pressure: 81 dB(A) | Sound Power: 92 dB(A) | Vibration Level: <2.5 m/s² | Exhaust: Rear | Governor Type: Ball | Main Material: Aluminum, Composite Over-Sleeve | Rotative Inlet: Yes | Spindle Lock: Yes | Starting System: Safety Lever

Features:

• Extended shaft configuration improves access into recessed areas, deep cavities, and hard-to-reach grinding or deburring points.
• 18,000 RPM free speed supports fast work with compatible carbide burrs, mounted points, and abrasive accessories.
• 1.5 HP / 1100 W governed motor helps maintain maximal abrasive speed during demanding material removal.
• Industrial-grade durability up to 1,000 hours between maintenance intervals.
• Streamlined safety lever helps reduce accidental start risk while keeping the tool practical for daily shop use.
• Spindle lock button allows faster carbide burr replacement to reduce tool downtime.
• Rear exhaust directs spent air away from the work surface and operator’s immediate line of sight.
• Aluminum body with composite over-sleeve provides a durable housing with a more manageable grip surface.

Applications:

• Metal fabrication: blending welds, deburring holes, cleaning edges, and shaping metal in areas that require extra reach.
• Foundry and casting cleanup: removing flash, parting lines, and surface defects inside castings or recessed features.
• Industrial maintenance and MRO: grinding, smoothing, and cleaning machine parts, brackets, guards, and repair components.
• Tool and die work: controlled material removal on molds, dies, fixtures, and machined components where access is limited.
• Vehicle and equipment repair: deburring frame components, brackets, body repair parts, and fabricated repair pieces in compressed-air shops.

FAQs:

• Q: What does the extended shaft on the CP3550-180ES help with?
  A: The extended shaft gives the operator more reach into recessed areas, castings, welded assemblies, and machine parts. It is useful when a standard straight die grinder body cannot get the abrasive accessory close enough to the work surface.
• Q: What accessories can be used with this die grinder?
  A: This grinder is used with compatible carbide burrs, mounted points, and abrasive accessories that match the collet size and speed rating. The accessory's maximum operating speed must be equal to or higher than the tool's 18,000 RPM free speed.
• Q: What air supply does the CP3550-180ES require?
  A: Chicago Pneumatic lists 55 CFM / 26 l/s air consumption at load and 36 CFM / 17 l/s at free speed. Use a system capable of maintaining 90 PSI / 6.3 bar at the tool with a minimum 1/2" / 13 mm hose.
• Q: Why does this grinder have a governed motor?
  A: A governed motor helps maintain abrasive speed as load changes. That matters when deburring or grinding because dropping too far below the intended speed can slow removal rates and make the accessory harder to control.
• Q: Is the CP3550-180ES the right choice for confined areas?
  A: Yes, when the work requires extra reach in a straight-line grinder format. For right-angle access around corners or flat surface grinding with angle-mounted accessories, compare this model with the CP3550 angle grinder versions instead.

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

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