Representative part-type image

For part-type identification only. Actual shape, dimensions, hole pattern, material, markings and fitment may vary by part number.

1055183

Product Type: Grader Blade
Brand: Caterpillar
Category: Grader Wear Parts
Key Dimensions: 30mm grader bit
Compatible Models: 120K 12K 140K 120M 12M 140M 160M

Reference specifications for identification and compatibility only.

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A. Specifications

Part Number	1055183
Product Type	Grader Blade
Brand	Caterpillar
Category	Grader Wear Parts
Dimension	30mm grader bit
Hardware	Bit pin system / Bit retainer system
Material	Alloy steel
Weight	Not listed

B. Compatible Equipment

Brand	Equipment	Model
Caterpillar	Motor Grader	120K
Caterpillar	Motor Grader	12K
Caterpillar	Motor Grader	140K
Caterpillar	Motor Grader	120M
Caterpillar	Motor Grader	12M
Caterpillar	Motor Grader	140M
Caterpillar	Motor Grader	160M

C. Related Part Numbers

Alternate Part Numbers	Not listed
Replaces	Not listed
Replaced By	Not listed
Similar Parts	1055180, 6Y4339, 6Y4340, 4286747

D. Related Components

Reference data only. Confirm dimensions and compatibility before ordering.

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Catalog Reference · Extended Reference

CAT Graders GET

Catalog p.81

1055183 is one of the key grader-bit references in the Cat MG system and is typically checked together with the corresponding width and spacing setup.

Reference Summary

Bit width class

30 mm grader bit reference

Fitment Groups

Cat MG Grader Bit System

Machine Models

120K12K140K120M12M140M160M

Reference Notes

A good grader page should explain how this reference sits alongside 23 mm, 15.5 mm, and 63.5 mm alternatives instead of treating it as a generic tooth page.