What is the bottom roller function
We specialize in manufacturing the whole set of undercarriage parts for 200 ton mining excavators. Now we have completed the PC1250 front idler, track and carrier roller, sprocket segment rim, chain assembly. More about the PC1250 bottom roller advantages are as follows: The material of bottom roller body is forged by 40Mnb2. High wear resistant Boron steel ,and the surface heat treatment HRC 48-55 depth up to 5-8mm. Precision CNC machine machining size is more accurate .Perfect interchangeability with original products The material of the center shaft of the track roller forged by 42CrMo.The hardness of surface heat treatment can reach 48-55HRC More wear-resisting . Core hardness of HRC 28 or above is not easy to fracture. Tempering 180 degrees before finishing. The surface of the center shaft of the track roller is polished by CNC machine tool to make the shaft smoother. High sealing aprons are used inside the track roller to prevent dirt, sand and water from damaging it. The track roller using friction welding technology welding quality is good and stable, and environmental protection, no pollution.Welding process does not produce smoke or harmful gas, no splash, no lone light and spark, no radiation.Known as the green welding technology of the future.| Komatsu PC1250 excavator undercarriage parts number list | ||
| Track Link Assy | 48L | 21N-32-00101 |
| Track Shoe | 700MM | 21N-32-31110 |
| Idler Assy | 21N-30-00111 | |
| Carrier Roller | 21N-30-00130 | |
| Track Roller | 21N-30-00121 | |
| Sprocket | 25T-38H | 21N-27-31191 |
| Description: | Bottom Roller Mining Excavator Equipment |
| Place of origin: | China |
| Brand name: | PT'ZM |
| Model number | PC1250 |
| Brand: | Komatsu |
| Parts number: | 21N-30-00121 |
| Price: | Negotiate |
| Packaging details: | Fumigate seaworthy packing |
| Delivery time: | 7-30 days |
| Payment term: | L/C T/T |
| Price term: | FOB/ CIF/ CFR |
| Minimum order quantity: | 1 PC |
| Supply Ability: | 1000 PCS/month |
| Material: | 40Mnb2/42Crmo |
| Technique: | Forging |
| Finish: | Smooth |
| Hardness: | HRC48-55, depth 5-8mm |
| Quality: | mining operation heavy duty |
| Warranty time: | 24 months |
| After-sales service: | Video technical support, Online support |
| Color: | Yellow or Black or Customer required |
| Application: | Crawler Excavator |
Main technical parameter for Komatsu PC1250 bottom roller
The function of the track roller is to convey the weight of an excavator to the ground . When an excavator is run on uneven ground, track rollers carry a tremendous impact. Therefore, the support of track roller is huge. Moreover, if it is of poor quality and is often dusty, it needs a very good sealing to prevent dirt, sand and water from damaging it.What are the production advantages of PC1250 bottom roller
Detail information
| Model | A | B | C | D | E |
| PC1250 | 388 | 550 | 480 | 372 | 300 |
| F | G | H | I | ||
| 126 | 276 | 320 | 180 |
