Crankstel: eenvoudig te verplaatsen tot 4 ton

The “Hidden Factory” in Your Tube & Bar Storage

For manufacturers like GHWA or high-end steel service centers, the integrity of your inventory is everything. You are dealing with polished stainless steel tubes, precision bar stock, and expensive alloys where surface roughness (Ra) values matter. Yet, many facilities still rely on floor stacking or standard static cantilever racking.

The problem isn’t just storage density; it’s the retrieval mechanics. When you store long materials in static racks, you are forced to use forklifts in narrow aisles. This creates a “danger zone” for your materials:

• The “Digging” Penalty: To get to a specific heat number or alloy buried at the bottom, your operator spends 20 minutes moving the top three bundles. This is “secondary handling”—pure waste.
• Surface Damage Risk: Maneuvering a 6-meter bundle of mirror-finish tubing with a forklift requires surgical precision. One bump against the uprights, or one scrape from the forks, and that material is scrap.
• Space Paralysis: To allow forklifts to turn with long loads, you are wasting up to 4 meters of aisle width. That is prime manufacturing real estate sitting empty.

The Logic: 100% Extension Changes the Game

The solution lies in changing how you access the load. Draagarmstellingen (often called Crank-Out or Roll-Out racks) utilize a heavy-duty gear and rack transmission system. This allows every storage level to function like a drawer.

From Forklift to Overhead Crane

By rotating the crank handle, the cantilever arm extends 100% out of the rack structure. This seemingly simple mechanical action completely alters your logistics flow:

1. Vertical Access: Once the drawer is extended, the material is fully exposed from above. You no longer need a forklift. You can use your shop’s overhead crane (bridge crane) with nylon slings or vacuum lifters.
2. Zero Contact: The crane lifts the bundle straight up. There is no dragging, no friction between bundles, and no risk of hitting the rack columns. For hygienic stainless steel components, this ensures the surface finish remains pristine.
3. Ergonomic Power: The transmission ratio is designed so that a fully loaded arm—carrying up to 5 tons—can be cranked out by a single person with minimal effort.

Comparison: Static vs. Dynamic Storage

Let’s look at the numbers. If you are feeding a laser tube cutter or a high-speed band saw, waiting for material is the biggest cause of machine downtime. Here is how Crank Handle Racks stack up against traditional methods.

Functie	Standard Cantilever (Static)	Crank Handle Rack (Dynamic)
Toegangsmethode	Forklift (Requires wide aisles)	Overhead Crane (Zero aisle needed)
Ophaaltijd	15-25 Minutes (Digging required)	2-4 Minutes (Direct access)
Damage Risk	High (Fork scrapes, collision)	Near Zero (Vertical lift, sling use)
Aisle Width	10-15 Feet (for long loads)	3-4 Feet (Operator walkway only)

Built for Heavy Industry

These systems are engineered for the harsh realities of a steel service center. We aren’t talking about light-duty shelving. The structure typically utilizes high-tensile structural steel profiles to handle the immense torque generated when a 4-ton load is fully extended.

Specific Features for Tube & Pipe

For clients managing round stock (pipes, tubes), stability is critical. Our roll-out cantilever racks can be equipped with:

• Dividers/Pins: Adjustable vertical pins on the arms prevent round pipes from rolling off or mixing with adjacent bundles.
• UHMW Liners: For sensitive materials like polished aluminum or sanitary stainless steel, we add Ultra-High Molecular Weight polyethylene strips to the steel arms. This ensures your metal never touches hard steel, preserving the Ra value.

Installation: Anchored for Safety

Because the center of gravity shifts when the arms are extended, proper installation is non-negotiable. Unlike light shelving that might just sit on the floor, Crank Handle Racks require a reinforced concrete slab. The base is secured using heavy-duty chemical or mechanical anchor bolts to counteract the overturning moment.

Our teams ensure that the columns are perfectly plumb and the transmission shafts are aligned to the millimeter, ensuring that the “easy crank” action remains smooth for years of operation.

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Veelgestelde vragen (FAQ)

Q1: Can I use this rack for 6-meter (20 ft) long stainless steel tubes?
Yes. We customize the number of columns and the spacing to support 6-meter, 12-meter, or custom lengths. For flexible tubes, we add more arms to prevent deflection (sagging) between supports.

Q2: Do I need an electric motor or is manual cranking enough?
For loads up to 3,000 kg (6,600 lbs) per level, the manual crank is surprisingly easy due to the gear reduction ratio. For heavier loads (up to 5 tons) or high-frequency cycling, we recommend the electric telescopisch draagrek.

Q3: How much aisle space can I actually save?
You can typically reduce your aisle width from 4-5 meters (required for forklift turning) to just 1 meter (for operator walking). Since you are loading from above with a crane, the “aisle” becomes storage space.

Q4: Will the steel arms scratch my polished sanitary tubes?
Standard steel arms can, but we offer UHMW (plastic) liners or rubber strips specifically for clients in the hygienic stainless steel industry to ensure scratch-free storage.

Q5: What are the floor requirements for installation?
Due to the high density of the load, we usually require a concrete floor with a minimum thickness of 6 inches (150mm) and a specific PSI rating. We will provide load calculations for your facility engineers to verify.