Komatsu Dozer D37/D38/D39 cutting edge 12F-70-31251/12F-70-31261/12F-70-31281

Our aftermarket full sets of Komatsu D37 D38 D39 crawler dozer Cutting Edge & End Bits replacement are bolt-on GET wear parts specially designed for D37 D38 D39 crawler dozer buckets. The Komatsu D37 D38 D39 crawler dozers are widely used in municipal infrastructure, road reconstruction, subgrade filling, bulk earthmoving, slope finishing, auxiliary mining leveling and hardened site cleaning.

There are mainly 4 raw material options :

1. 30MnB Boron steel : use most, hardness is about HRC 440–500,can balance toughness and wear resistance well,it is ideal for sand, gravel and earth works.

2. C80 Carbon Steel : it is economical, hardness can reach HB280–360 after quenched and tempered, Suit for pure earthmoving and loose material handling, not fit rocky and high-impact sites.

2. NM400/NM450 alloy steel : own superior anti-scouring and wear resistance compared with boron steel, has greatly extending service life for long-term gravel, aggregate and construction debris working scenarios.

3. Mn13 high manganese steel : own work-hardening property, the surface will get harder under continuous impact. It fits occasional rock and hard impact. Not economical for pure earthmoving.

To ensure stable quality,our factory execute strict quality inspection during our entire process :
1. Material Test: use spectrometer inspection to verify chemical composition , ensure alloy elements like carbon, chromium and manganese meet standard.
2. Hardness Test: adopt random Rockwell hardness test,ensure uniform hardness for cutting edge and end bits and working surface reaches required hardness while maintaining proper toughness to avoid brittle fracture.
3. Dimension Inspection: we will check overall length, thickness, bolt hole pitch and bevel angle, and control tolerance within industrial standard.
4. Visual & Magnetic Particle Inspection: no cracks, porosity or laminations. No chipping on cutting edge and no burrs around bolt holes.
5. Sampling Impact Test: our technician will simulate working impact to verify anti-breakage performance.

Welcome to contact us for more details ! We supply high quality replacement cutting edge and end bits for Komatsu D37 D38 D39 crawler dozer. Our GET parts pass strict hardness and dimension inspection. Could you kindly tell us your OEM number, working site condition and material option? Also advise if you need matching high strength bolts. We will prepare formal quotation with lead time and packing details for you soon.