Blow bar is key rotating wear casting fitted on the rotor of horizontal shaft impact crusher. High chrome blow bars strike and crush rocks to produce cubical aggregate and manufactured sand. Multiple alloy grades available for limestone, pebble and recycling crushing. Custom castings for various impact crusher models.
Impact Crusher Blow Bar
High Chrome Cast Blow Bars for Horizontal Shaft Impact Crusher
Product Overview
Blow bar is the core rotating wear spare part fitted on the rotor of horizontal shaft impact crusher (HSI). As the rotor spins at high speed, blow bars strike incoming rock material violently, throwing stones against impact plates for repeated crushing. It takes the main impact and abrasive wear during operation.
Blow bars are consumable cast components and need periodic replacement once worn. They are widely used for primary, secondary crushing and sand making in quarry, aggregate plant, sand washing production line. Different alloy grades are selected based on raw material hardness and abrasiveness.
Disclaimer: All products are compatible replacement wear castings, not genuine OEM original brand parts.
Working Principle & Core Function
- High-speed Rock Impact: Rotating blow bars hammer raw stone and accelerate material into impact aprons for fragmentation.
- Bear Heavy Impact & Abrasion: Absorb continuous shock and sand abrasion, protecting rotor assembly.
- Control Finished Aggregate Shape: Produce cubical stone, ideal for high-quality construction aggregate.
- Modular Installation: Easy to mount and dismount on rotor, reduce crusher maintenance downtime.
- Flexible Alloy Options: Choose proper blow bar material for soft rock, medium rock or highly abrasive hard stone.
Material & Structure Features
Available Material Grades
- High Chromium Cast Iron (21% / 27% Cr) — most popular for medium abrasive rock
- Martensitic Alloy Steel — for heavy impact, less abrasive stone
- High Manganese Steel — for large lump, high impact conditions
Product Features
- Precision casting, matched locking grooves for rotor fit
- Heat treated casting for optimized hardness & toughness
- Anti-crack performance under cyclic striking impact
- Custom profiles and mounting dimensions for different crusher models
Technical Parameters
| Item | Specification |
|---|---|
| Material Options | 21%Cr / 27%Cr High Chrome, Alloy Steel, High Manganese Steel |
| Applicable Machine | Horizontal Shaft Impact Crusher (HSI) |
| Manufacturing Process | Sand Casting + Heat Treatment |
| Surface Hardness | HRC 52 ~ HRC 62 (High Chrome Type) |
| Mounting | Key / Wedge locking, custom groove design |
| Custom Service | Custom casting by drawings, samples or crusher model |
Applicable Materials & Working Conditions
Applicable Materials
- Limestone, dolomite, river pebble, gravel
- Basalt, granite, quartz, construction waste concrete
- Coal, gypsum and medium-hard mineral ores
Application Industries
- Quarry & aggregate crushing plant
- Sand & gravel making production line
- Construction waste recycling plant
- Cement plant raw material crushing
Our Core Advantages
- High chrome casting with strict heat treatment for longer service life
- Accurate casting dimensions, perfect fit for impact crusher rotors
- Multiple alloy options to match different rock abrasion levels
- Good balance of hardness and toughness, less breakage risk
- Custom castings available for various HSI crusher models
- Factory direct supply, flexible MOQ for global mining & aggregate customers
FAQ
Q: What is blow bar used for?
A: Blow bar is rotor-mounted wear part for horizontal impact crusher. It hits and breaks rock materials to produce cubical aggregate and manufactured sand.
Q: Which blow bar material should I choose?
A: High chrome (27%Cr) for limestone, river sand and medium abrasive rock. Alloy steel for heavy impact large stones. Manganese steel for extreme impact applications.
Q: Can you produce blow bars for different impact crusher models?
A: Yes, we can produce blow bars according to crusher model, part number, drawings or physical samples.
Q: How often to replace blow bars?
A: Service life depends on material abrasiveness. Limestone: several weeks; hard basalt may wear much faster. Replace when impact efficiency drops or thickness is too low.
Request A Quotation
Please provide impact crusher model, raw material type and required quantity. Send drawings or photos if available. We will recommend suitable alloy grade and prepare quotation quickly.
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