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For Caterpillar CAT 305E Excavator
Bottom Roller Weight：22.05 pounds; Package Dimensions：6.69"X6.69"X10.6"
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
8 Months warranty; US Local Delivery! Professional Installer is Highly Recommended; No Instruction Included!Any doubts and quality issues pls contact us first!

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Package Include:
1x Track Roller （As Shown）

Application:
For Caterpillar CAT 305E Excavator

Specifications：
Bottom Roller Weight：22.05 pounds
Package Dimensions：6.69"X6.69"X10.6"
Item Package Quantity：1 x Bottom Roller
Color:Black
Material: 50 MnB Steel
Surface Hardness: HRC52-58, Depth:5mm-10mm
Finish:Smooth
Technique: Forging and Casting

Description：
1. Wheel body: material 50 Mn, hardening hardness HRC 25-28, CASE hardening hardness HRC 52-56, hardening thickness 5-8mm.
2. Side cover: QT 450-10, strength as follows: tensile strength ob (MPa): 2450 yield strength 00.2 (MPa): 2310 hardness: 160 ~ 210 hb.
3. Roller: 45 # carbon steel or 40 Cr. Quenching of HRC25-30 and surface quenching of HRC 52-58. Hardening depth of 2-3mm.
4. Lock pin 65 Mn or 45 carbon steel, hardness HRC 25-28.
5. Bolts, grade 12.9, HRC 45-52.
6. Seal: nitrile rubber. Operating temperature range-20℃ to 110℃.

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