236GLF-250-C4 CLECO 236 Series Inline Grinder. Cleco 236 Series Inline Grinder with 200 Series Collet is designed for demands of heavy industries, which can include shipbuilding, foundries, metal fabrications, etc. The Cleco 236 Series Inline Grinder with 200 Series Collet is made with rugged advanced alloy housing and is available in Front and Side exhaust models. Collet Size: 1/4” Exhaust: Front Free Speed (rpm): 25,000 Abrasive Capacity: 1” Carbide Burr Type Housing: Aluminum Weight: 1.4lbs / 0.64kg Overall Length: 6.8” / 173mm Air Inlet Size: 1/4”