John Deere 27C 27ZTS 35C 35G 35D 35ZTS 27 ZTS. Part Type: Bottom Roller. Compatible Equipment Type: Excavator. Material 50Mn, through hardened HRC 25-28, CASE hardened HRC52-56, hardened thickness 5-8mm. Yield strength? 0.2 (MPa):? 310. Roller, 45# carbon steel or 40Cr, quenched HRC25-30, surface quenched HRC52-58, hardened to a depth of 2-3mm. Bolt, grade 12.9, HRC45-52. This bottom roller is a durable undercarriage replacement part for your excavator. Our rollers utilize special high strength-hardened steel and quality seal groups that provide excellent lubricating oil retention. Sealed bearings stop dirt, mud, and grime from penetrating inner components. It was designed and manufactured to exact OEM specifications using a high-quality, high-strength steel. It will provide long-lasting and dependable performance even if you operate in the most extreme conditions. Please make sure it will fit your machine before purchasing it. If you are not 100% sure this is what you need, please find out your engine model, series number and contact our Customer-service. Communication is the best way to solve the problem. If you have any problems after you. Please verify that this address is the correct one you wish to have your package sent to. About us: Hoping to bring miraculous changes to your patio? Supernova is here to help turn your patio into an outdoor paradise. When you relax in your patio with your families and friends after work or at weekends, enjoying the quiet evening or having a garden party, Supernova is definitely your best choice. Adhering to humanity design, we are dedicated to developing eachof our productsand conveying a strong sense of belonging to our customers. Trust Supernova, trust us.