Blow Bar
Blow Bar
METSO · Part Details
Impact Crusher Rotor Wear Part System
Impact Crusher Rotor Wear System
Identify parts for Metso impact crushers, check models and drawing numbers, confirm materials and processes, and submit an inquiry.
Key Parts Covered
This page identifies installation positions that share the same wear-resistant material and manufacturing process requirements.
Blow Bar Locking Wedge
Blow Bar Retaining Wedge
Blow Bar Support Strip
Blow Bar Backing Bar
Rotor Protective Liner
Rotor Protection Liner
Materials and Processes
Select the material grade and heat treatment for the operating conditions, processed material and equipment specifications. The options below are commonly used; confirm the final grade against the drawing and technical agreement.
Martensitic Wear-Resistant Steel (450-550 HBW)
Select materials to suit OEM specifications and operating conditions; confirm the final grade and heat treatment against the drawing.
Hardox 400-500
Select materials to suit OEM specifications and operating conditions; confirm the final grade and heat treatment against the drawing.
Cr26 high-chromium cast iron
Select materials to suit OEM specifications and operating conditions; confirm the final grade and heat treatment against the drawing.
Wear and Replacement Criteria
Common wear patterns and maintenance guidance are outlined below. Determine replacement intervals from operating conditions, processed material and equipment performance data.
Common Wear Patterns
- Interrelated wear across the rotor wear parts
- Wear causes rotor dynamic imbalance
- Wear at blow bar and liner mating faces
Replacement Criteria
Apply the replacement criteria for each wear part individually. Inspect all rotor wear parts whenever blow bars are changed, and check dynamic balance at the specified intervals.
Equipment, Models and Drawing References
Identify the installed machine model and key dimensions, then check the part number, drawing number, drawing revision and physical interfaces.
Equipment Series
Metso Impact Crusher
Models and Key Dimensions
Metso Nordberg NP Series Range
Drawing Number / Part Number
Provide the equipment nameplate, complete model and existing part number so that the installation position and drawings can be checked.
Drawing Revision
Confirm dimensions by measuring the sample or using the customer drawing. Cross-check the drawing revision against the model on the equipment nameplate.
Materials and Processes
Materials, heat treatment, composite construction and inspection requirements depend on the specific drawing, operating conditions and technical review.
Material Grade / Substrate
Martensitic wear-resistant steel (450-550 HBW) / Hardox 400-500 / Cr26 high-chromium cast iron
Heat Treatment Condition
Follow the applicable standard for the material grade; confirm heat treatment and hardness requirements against the drawing
Composite / Hardfacing Requirements
Follow OEM design requirements; confirm any hardfacing or composite construction against the drawing
Dimensions and Inspection
Inspect key dimensions against the drawing for the OEM part number. Check mounting and sealing surfaces individually and perform UT/MT non-destructive testing on castings.
Parts with the same name may not be interchangeable because of differences in machine model, drawing revision, mounting interface or material specification. Use the complete model, serial number, drawing number and drawing before manufacture.