Cast to drawing or sample
A worn bar is enough to start. The mounting faces give us the original geometry.
Crusher Wear Parts
SBM Blow Bars
Replacement bars for SBM impactors, cast to drawing or reverse-engineered from a worn sample.
Overview
About sbm blow bars
Melco produces replacement blow bars for SBM impact crushers used across European and Middle Eastern aggregate operations. The bars are cast to the customer drawing where one is available, and reverse-engineered from a worn sample where it is not.
The alloy is chosen with the customer rather than defaulted. Clean abrasive quarry rock generally points to high chrome; mixed or recycled feed with tramp metal points to manganese or a martensitic grade.
Bars are supplied in weight-matched sets with chemical and hardness certificates for the heat.
Applications
- SBM impact crushers, mobile and static
- Quarry aggregate and road base production
- Limestone and hard rock crushing
- Recycling and demolition waste processing
Features
What you get
Alloy chosen with you
We discuss the feed and duty before recommending a grade rather than shipping a single default.
Certificates with every heat
Spectrometer analysis and hardness results supplied as standard.
Container-ready packing
Palletised, strapped and marked for sea freight without repacking.
Specifications
Manufacturing specification
Applies to sbm blow bars produced at our works. Castings outside this range can usually be accommodated, so please ask.
| Moulding | No-bake resin sand and green sand |
|---|---|
| Melting | Induction furnace, spectrometer-controlled |
| Piece weight | 5 kg – 2,000 kg |
| Heat treatment | In-house, computer-controlled cycles |
| Dimensional control | Template and CMM check against drawing |
| Documentation | Chemical, hardness and dimensional report per heat |
Material grades
| Grade | Typical composition | Hardness | Suited to |
|---|---|---|---|
| ASTM A532 Cl. II Type B (15Cr-3Mo) | 14–18% Cr, 2.5–3.5% Mo, 2.4–3.0% C | 58–64 HRC | General high-abrasion impact crushing |
| ASTM A532 Cl. II Type D (20Cr-Mo) | 18–23% Cr, 1.5% Mo max, 2.0–3.3% C | 58–63 HRC | Abrasive limestone and secondary duty |
| Low-alloy martensitic steel | 0.3–0.5% C, Cr-Ni-Mo alloyed | 45–52 HRC | Mixed impact and abrasion |
| Martensitic / manganese composite | Hard martensitic face, austenitic Mn body | 50 HRC face, tough core | Reinforced concrete and recycling |
Composition ranges are quoted against the published standard. Actual analysis for your heat is issued with the castings.
Gallery
From our works
-
High chrome bars after fettling, before dimensional check. -
Mounting profile: the face that decides whether a bar seats square. -
Replacement bar produced from a customer sample.
Questions
SBM Blow Bars: common questions
Can you make SBM blow bars without a drawing?
Yes. Send a worn bar and we will recover the mounting geometry from the unworn faces, rebuild the wear profile and confirm the drawing with you before cutting a pattern.
Which alloy do you recommend for quarry limestone?
For clean, abrasive limestone with limited tramp metal, high chrome in the 15Cr-3Mo or 20Cr-Mo range generally gives the best tonnes per set. If the pit produces occasional uncrushables, a martensitic grade is the safer compromise.
Do you supply the impact aprons as well?
Yes. Impact plates and aprons are cast in the same alloy families. Replacing bars while running badly worn aprons wastes bar life, so the two are usually planned together.
More from our range
Related products
Enquiry
Enquire about sbm blow bars
Tell us the machine, the feed and the quantity. If you have a drawing or photographs of the worn part, mention it and we will send an upload link.
Melco Castings is an independent manufacturer of replacement wear parts. Machine and OEM names are used only to identify the equipment our castings fit. We are not affiliated with, endorsed by, or a distributor for any of these manufacturers.