Fitment:
Compatible with Cat
Model: 304 304.5 305 305.5 306

Roller Specifications：
Brand: KUUHLERSAT
Part Type: Bottom Roller
Compatible Equipment Type: Excavator
Compatible Equipment Make：for Caterpillar
1.Shell Material 50Mn, through hardened HRC 25-28, CASE hardened HRC52-56, hardened thickness 5-8mm.
2. Side cover : QT450-10.
Strength is as follows
Tensile strength σb (MPa): ≥450
Yield strength σ0.2 (MPa):≥310
Hardness:160 ~ 210 hb
3. Roller, 45# carbon steel or 40Cr, quenched HRC25-30, surface quenched HRC52-58, hardened to a depth of 2-3mm.
4. Locking pin, 65Mn or 45 carbon steel, hardened HRC25-28.
5. Bolt, grade 12.9, HRC45-52. 6.
6. Seal: Nitrile rubber. Operating temperature range -20℃ to 110℃.
Note:Please confirm the item if it matches your need before you purchase.

Why Choose KUUHLERSAT Bottom Roller ?
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.Made of durable material which is totally corrosion and dust resistant, each item has been factory tested and meets or exceeds OEM specifications.
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.

PLS NOTE:
Please make sure it will fit your machine before purchasing.
If product is defective or damage upon arrival, or wrong product shipped, please contact us immediately.

Package Include:
1x Bottom Roller