Heavy-duty counterweights for mobile, crawler, tower and port cranes — a welded steel box filled with compacted steel grit and iron blocks.
A welded steel box filled with compacted steel grit and iron blocks reaches the weight you specify without a pattern or a casting. Every unit is weighed and dimensionally inspected before shipment.
| Application | Mobile and truck cranes, crawler cranes, tower cranes and gantry or port cranes — built to the crane manufacturer's drawing or your own design |
|---|---|
| Material | Q355B (S355JR) Steel Plate — welded box construction, filled with compacted steel grit and iron blocks |
| Weight Range | 1,000 kg – 20,000 kg (2,200 – 44,000 lbs) |
| Unit Size | Agreed per project. Transport sets the practical limit on very large units, so we design to the envelope you need — give us the destination and we confirm crated dimensions and weight with the quotation. |
| Weight Tolerance | ±1% of specified weight |
| Manufacturing | CNC laser cutting → press brake forming → MIG welding → steel grit and iron block filling → machining → surface finishing |
| Surface Treatment | Shot blasting + anti-rust primer + high-durability enamel paint |
| Mounting Type | Bolt-on with reinforced mounting bosses; lifting points and handling features integrated per drawing |
| Standards | ISO 9001:2015, material cert per GB/T 1591 Q355B (S355JR) |
| Packaging | Heavy-duty wooden crate with VCI rust protection |
| MOQ | 1 unit (sample), 5+ units (production batch) |
| Lead Time | 45 days depending on quantity and customization |
| Customization | OEM/ODM: custom weight, dimensions, color, logo, mounting pattern and integrated features |
The common factor across every crane type below is that the counterweight is a welded steel fabrication. If your counterweight is welded rather than cast, we can build it.
Every unit is weighed before the cover plate is welded on, and weight and dimensional records are supplied with the shipment. Tell us the destination as well — a very large counterweight can be built but not necessarily shipped, so we agree the unit size against the transport you have arranged before cutting starts.
A crane owner or operator can add counterweight to a machine already in service to change its lifting configuration. We build these units to the specification and drawing you supply.
Adding counterweight changes the load chart of the crane. Any add-on unit we supply is manufactured strictly to the specification and drawing provided by the crane owner or the crane manufacturer. We do not determine, approve or advise on the resulting lifting capacity — please confirm the change with the crane manufacturer or a qualified engineer before ordering.
If you currently buy this counterweight as a casting, we can re-engineer it as a welded fabrication — no tooling, no minimum batch, no pattern lead time.
The box is filled with compacted steel grit and iron blocks, and every unit is weighed before the cover plate is welded on. Send us your existing casting drawing or a sample and our engineers will return a welded-fabrication proposal within 24 hours.
The more detail you share, the faster and more accurate your quotation will be. Not sure about something? Just email us what you have.
No drawings? Send us photos or the crane brand & model — our engineers will work from that and send a technical review within 24 hours.
Mobile and truck cranes, crawler cranes, tower cranes and gantry or port cranes. The common factor is that the counterweight is a welded steel fabrication — a box filled with compacted steel grit and iron blocks. Send us the drawing or an existing part and we will confirm we can build it.
A welded box filled with compacted steel grit and iron blocks reaches the exact specified weight at a lower material cost than a solid casting, and it needs no pattern. It also lets us adjust the weight by changing the fill rather than the outer envelope, so your mounting interface stays as drawn.
Every unit is weighed before the cover plate is welded on, and the finished counterweight is verified against the specified weight. Standard tolerance is ±1% of the specified figure. Weight and dimensional records are supplied with the shipment.
Unit size is agreed per project. Very large counterweights are limited by what can be transported, so we build to the envelope you need — tell us the destination port and we will confirm the crated dimensions and weight with the quotation before cutting starts.
Yes, built strictly to the specification and drawing supplied by the crane owner or the crane manufacturer. Adding counterweight changes the crane's load chart, so we manufacture to that specification and supply the weight and dimensional records — we do not determine, approve or advise on the resulting lifting capacity.
Standard finish is shot blasting + anti-rust primer + high-durability enamel paint. Custom RAL colors and logos are available on request.
Yes, and it is one of our most common engineering requests. Send us the existing casting drawing or a physical sample and we will re-engineer it as a welded box filled with compacted steel grit and iron blocks. You avoid pattern tooling entirely, MOQ drops to 1 unit, and design changes are handled by re-issuing the drawing rather than cutting a new pattern.
We reply by email within 24 hours with a technical review and quotation. Attach drawings or photos directly in the email.
Fill out this form and we will reply by email within 24 hours.
