Custom Counterweights
Kurt Foundry casts and machines counterweights for cranes, elevators, forklifts, tractors, and heavy earthmoving equipment. Every counterweight is sized to your exact weight, bolt pattern, and lifting-point spec — not pulled from a generic catalog.
What We Customize for You
Standard counterweights are cast to a generic shape and a rough weight range. When your equipment needs an exact mass, a specific bolt pattern, or a particular lifting-point layout, Kurt Foundry casts and machines the counterweight to your drawing instead.
1. Weight
We pour every counterweight to your target mass, not a rounded catalog figure. Final weight is verified on a certified scale before shipment, with tighter tolerances available for stability-critical applications like tower cranes and elevators.
2. Dimensions & Envelope
Overall length, width, height, and profile are cast to fit your equipment’s exact footprint — including any clearance, radius, or cutout your frame requires — so the counterweight drops into place without field modification.
3. Bolt Pattern & Mounting
Hole spacing, thread size, and mounting face flatness are machined to match your equipment’s frame drawing exactly, so the counterweight bolts on with your factory hardware — no field drilling or shim plates.
4. Lifting Points & Rigging
Lifting lugs, eyes, or pick points are cast or machined into the counterweight at the positions your rigging plan calls for, positioned for safe, repeatable handling during installation and service.
Our Custom Counterweight Product Line
We cast counterweights for the specific machine you run — not a one-size-fits-all block. Here is where our customers put our counterweights to work.
Crane Counterweights
Mobile and crawler crane counterweights are cast to your exact tonnage and stacking geometry, with lifting lugs and locating pins positioned for fast, repeatable rigging. Alloy is matched to your crane manufacturer’s load rating and duty cycle.
View Crane Counterweights
Elevator Counterweights
Elevator counterweight sections are cast to the precise unit weight your car-to-counterweight ratio calls for, with consistent density piece to piece so cars ride smooth and level. Standard and custom frame-mounted designs are available.
Forklift Counterweights
Forklift counterweights are cast to the exact mass and mounting bolt pattern your chassis needs to hold rated capacity at full mast extension. We hold tight weight tolerances so trucks pass stability certification without added shims.
Tractor Counterweights
Front and rear tractor counterweights are cast to your implement and ballast requirements, keeping the axle load and steering traction your equipment needs during heavy tillage or loader work.
View Tractor Counterweights
Excavator Counterweights
Excavator counterweights are cast to match your machine’s dig-depth and lift-capacity rating, with the rear-frame mounting face machined flat for a snug, vibration-free fit.
Wheel Loader Counterweights
Wheel loader counterweights are sized to your bucket capacity and tipping-load spec, keeping the machine stable through full-bucket lift and dump cycles.
Bulldozer Counterweights
Bulldozer counterweights are cast to offset blade and ripper loads, holding the undercarriage balance your OEM spec requires for grading accuracy.
Road Roller Counterweights
Road roller counterweights are cast to your drum-to-frame weight distribution spec, maintaining consistent compaction force across the full working width.
Tower Crane Counterweights
Tower crane counterweight blocks are cast in stackable modular sections with integrated lifting eyes, sized to your jib length and maximum load moment.
Have a Drawing Ready?
Send us your CAD file or sample part and get a direct-factory quote back within 48 hours — no distributor markup, no guesswork on weight or fit.
Request a Free QuoteMaterial Grades for Custom Counterweights
| Standard / Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Common Applications |
|---|---|---|---|---|
| ASTM A48 Class 30 (Gray Iron) | ≥ 207 | – | – | Standard ballast weight for cranes, forklifts, and elevators — lowest cost per pound. |
| ASTM A48 Class 40 (Gray Iron) | ≥ 276 | – | – | Heavier-duty blocks for tower cranes and heavy tractor counterweights. |
| ASTM A536 65-45-12 (Ductile Iron) | ≥ 448 | ≥ 310 | ≥ 12 | Shock-loaded counterweights for excavators, bulldozers, and wheel loaders. |
| ASTM A27 Grade 70-36 (Carbon Steel) | ≥ 485 | ≥ 250 | ≥ 22 | Extreme-duty applications, custom carbon steel castings for mining and quarry equipment. |
Why Choose Custom Counterweights from Kurt Foundry
Every custom counterweight we produce is cast, heat-treated, and CNC machined under one roof — engineered to hold the exact mass and mounting geometry your equipment requires.
Exact Mass Control
Counterweight performance lives or dies on precise weight, not just outer shape. We control pour weight and verify final mass on every casting so your equipment’s load rating and stability calculations hold true.
Custom Bolt Patterns & Lifting Points
Our engineers machine mounting holes, lifting lugs, and locating pins to your exact frame drawing, so the counterweight bolts on without field modification or shimming.
Direct-Factory Supply Chain
Skip the middleman markup on replacement or OEM counterweights. Partner directly with Kurt Foundry for transparent pricing, direct metallurgical support, and DDP shipping to your facility.
Our Manufacturing Process
DFM and Weight Verification
Our engineering team reviews your counterweight drawing to confirm target mass, mounting geometry, and lifting-point placement before cutting any tooling.
Pattern Making & Core Design
We machine casting patterns in-house using precision CNC routers, and engineer resin sand cores for any internal cavities or lightening pockets your design calls for.
Resin Sand Molding & Pouring
We pour in furan resin sand molds for tight dimensional control, with pour weight monitored in real time to hold your target mass.
Heat Treatment & Stress Relieving
Heavy counterweight sections are stress-relieved under a controlled thermal cycle, keeping the casting dimensionally stable through machining.
Final Machining & Inspection
We mill mounting faces, drill bolt patterns, and machine lifting points, then verify final weight and critical dimensions on every unit before it ships.
Quality & Weight Verification
Counterweights only do their job if the mass is right. Read more about us and our zero-defect policy. Kurt Foundry provides fully traceable Material Test Reports (MTRs) with every shipment.
- Spectrometric Analysis: Pre-pour chemical testing verifies the exact ASTM alloy chemistry.
- Certified Weight Check: Every finished counterweight is weighed and certified against your target mass tolerance.
- Mechanical Testing: In-house testing verifies tensile strength, yield strength, and Brinell hardness.
- NDT Capabilities: Ultrasonic Testing (UT) confirms internal structural soundness in thick-walled sections.
- Ready-to-Install Delivery: Integrated CNC milling and drilling eliminates the need for secondary machine shops.
Custom Counterweights vs. Standard Catalog Blocks
Standard counterweight blocks are cast to a generic shape and a rough weight range. When your equipment demands more, custom counterweight castings close the engineering gap.
Custom Counterweight Castings
- Weight matched to your exact load rating and stability calculation, not a rounded catalog figure
- Bolt pattern, lifting lugs, and locating pins machined to your equipment’s frame drawing
- Material grade selected for your duty cycle, from gray iron ballast to carbon steel extreme-duty blocks
- Certified weight verification and Material Test Reports ship with every unit
- Single-source supply from casting through final CNC machining
Standard Catalog Counterweights
- Fixed weight increments force your design to accommodate the block rather than the reverse
- Generic bolt patterns often require field drilling or shim plates to fit your frame
- One-size material grade may underperform in high-shock or corrosive service conditions
- No certified weight documentation, leaving stability calculations unverified
- Multiple vendors required for raw casting, machining, and finishing
Frequently Asked Questions
We control pour weight during casting and verify final mass on a certified scale before shipment. Standard tolerance is tighter than typical catalog blocks, and we can hold tighter tolerances for stability-critical applications like tower cranes and elevators.
Our furan resin sand molding lines handle heavy industrial components from small forklift counterweights up to multi-ton crane and tower crane blocks cast as a single piece. Larger designs can also be cast in stackable modular sections.
Yes. Send us the OEM drawing, a sample part, or the equipment model and load rating, and our engineering team will reverse-engineer the weight, bolt pattern, and lifting-point geometry to produce a drop-in replacement.
Yes. We cast the raw block and perform all final CNC machining in-house — milling mounting faces, drilling bolt patterns, and machining lifting points — so the counterweight is ready to install immediately upon delivery.
New counterweight projects requiring new pattern tooling typically take 4 to 6 weeks from design approval to first article delivery. Repeat orders using existing patterns ship within 3 to 4 weeks, since we retain your pattern tooling at no additional storage cost.
Ready to Quote Your Custom Counterweight Castings?
Stop compromising your equipment design with standard catalog counterweight blocks. Partner with Kurt Foundry to manufacture custom counterweights engineered exactly to your load ratings, bolt patterns, and lifting-point requirements. Whether you need a single replacement counterweight or a production run of 500+ units, our foundry delivers. Send us your CAD files today, and our metallurgical team will provide a comprehensive DFM review and a direct-factory price for your custom counterweight project.
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