Pinion Shaft
Pinion Shaft
Pinion Shaft
Pinion Shaft
Pinion Shaft
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PARAMETERS
Pinion Shaft is the key component in the transmission system of the mill, especially the large-scale SAG mill , AG mill and ball mill. It has strict requirements for material and manufacturing, complex process flow and high precision. Therefore, the selection, technology and manufacture of pinion shaft reflect a certain industrial level. For this reason, our pinion shaft process design and manufacturing standards have standardized and strict standards. Gears must be hardened by gas carburizing according to AGMA, ASTM and ISO standards. Carburizing process must control heating and cooling process. The tolerances of individual components of pinion are classified according to the corresponding accuracy level, including pitch error, tooth direction error, tooth profile error, tooth thickness and surface roughness. To measure gear runout (radial runout, end runout). After all hardening and tempering are completed, the residual compressive stress can be reduced by grinding the tooth surface after grinding, forming and heat treatment. Incorrect grinding at the tooth surface and root angle can cause tension stress or cracks in these areas.
The accuracy of carburized gears should be up to AGMA2101-D04, AGMA6114 and AGMA2015 (A5), quenched and tempered gears should be up to AGMA2101-D04, AGMA6114 and AGMA2015 (A7). Metal inclusions (purity) shall be inspected in accordance with ASTM E45 and meet the requirements of AGMA 6114 Standard.

■ Pinion Shaft Main Material 
17CrNiMo6,20CrNi2MoA,30Cr2Ni2Mo 

■ Pinion Shafts Mechanical Properties

Mechanical properties

                           Material Brand

17CrNiMo6

20CrNi2MoA

30Cr2Ni2Mo

Minimum Tensile Strength (Sample)

1080MPa

1080MPa

1000MPa

Minimum yield strength (specimen)

785MPa

785MPa

800MPa

Minimum Elongation

7%

8%

10%

Minimum Section Shrinkage

40%

35%

45%

Shock Value

Aku≥31J

Aku≥47J

Aku≥40J

Hardness (Surface)

HRC57-62

HRC57-62

HB300-340

Hardness (Core)

≥25HRC

≥25HRC

 


Pinion Shaft Manufacturing Process 

According to different materials and different requirements, it can be divided into two processes:
 Casting Ingot →Forging →NDT→Semi-finishing →Carburizing + Tempering →NDT → Grinding Finishing →Dimension Detection
Casting Ingot→ Forging →NDT→ Semi-finishing →Tempering→ NDT→ Finishing→ Dimension Detection
After the final processing of teeth, 100% of the contact area and root area of the finishing teeth should be in accordance with AGMA6114 and ASTM.
Standard for visual inspection and magnetic particle inspection. Contact area includes tooth surface and other tooth colors. Root area consists of bottom alveolar and transition corner. Shaft part In addition to the keyway, magnetic particle inspection is also carried out in the district.


Surface carbon concentration, surface metallographic structure, carburized layer structure, carbide precipitation, retained austenite, core metallographic structure should be appropriate.
When the standard is checked and conforms to AGMA 6114 Standard Table 7, Items 11-15 M2 and AGMA 2101-04. 
Process
1Pinion Shaft Manufacture 2Reasons for choosing HENGIN'S Pinion Shaft
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