Count the bucket as suspended load
Use the measured material density and realistic fill to calculate cargo mass, then add the selected bucket's own mass.
- Density range
- Bucket self-weight
- Crane and rope capacity
TWO-ROPE / BULK MATERIAL
Two-Rope Clamshell Grab Bucket
Use a two-rope clamshell where one rope supports the bucket and the other closes it, subject to the selected crane arrangement. The purchase decision starts with the actual material load and operating geometry, then checks reeving, available headroom and the crane's ability to control both rope functions.
EQUIPMENT PHOTOGRAPH / 01
- ROPE FUNCTIONS
- Support and closing
- MODEL EXAMPLE
- S0525
- BUCKET VOLUME
- 2.5 m³, S0525
- ORDER BASIS
- Matched crane interface
Send the existing crane's hoist drawings, support and closing rope sizes, load rating, available lift height and the bulk cargo's density and target cycle.
01
One-unit enquiries welcome
The selected attachment's minimum order and supply scope are confirmed in the written offer.
02
Crane and attachment checked together
Review the loaded attachment, connection, operating cycle and site clearances before approval.
03
Clear delivery and support scope
Agree inspection, documents, packing, schedule, site support and warranty before order placement.
01 / SPECIFICATIONS
One S0525 configuration, kept as one specification.
The S0525 values below belong to one configuration. The selected bucket still needs its own self-weight, open dimensions and approved crane interface.
Swipe to compare the complete selected-unit parameters →
| Model | Crane rating | Bucket volume | Material density | Listed material per grab | Rope arrangement |
|---|---|---|---|---|---|
| S0525 | 5 t | 2.5 m³ | ≤1 t/m³ | 2.5 t | 1 support + 1 closing, Ø16 mm |
S0525 is listed with reeving ratio 5 and Ø360 mm sheave. The 2.5 t value is material mass, not the bucket's self-weight. Confirm the complete suspended load before using a 5 t crane.
Rope and outline data for these configurations
| Model | Rope / sheave arrangement | Outline dimensions |
|---|---|---|
| S0525 | Ratio 5; Ø360 mm sheave | H 3,280 / D 3,040 mm |
H and D are outline labels. Use the approved unit drawing for installation clearances, opening width and building work.
Is an existing two-drum crane automatically compatible?
No. Drum function, rope diameter, reeving, available travel, closing stroke and controls must fit the selected bucket. Compare both equipment drawings before committing to the attachment.
Review the configuration
02 / APPLICATIONS
A planned grab cycle for lighter loose cargo.
01
Grain and light bulk
Check cargo density, flow and leakage at the shell edges. Keep the bucket size within the actual crane load after its own mass is added.
02
Sand or aggregate transfer
Moisture and particle distribution affect filling, wear and release. Verify the shell, cutting edge and hopper opening for the material actually handled.
03
Hopper feeding
Confirm that the open bucket clears the receiving mouth and that rope travel provides the required pickup depth and discharge height.
The listed S0525 material load is a reference for its stated density. A heavier cargo or higher fill may call for a smaller bucket or a higher-rated crane. Compare the matching crane system.
03 / CONFIGURATION
Choose the attachment around the actual lift.
Pair the bucket's volume and shell geometry with the crane's supporting and closing ropes. Check the loaded grab mass, rope diameter, reeving, drum travel and pickup-to-hopper clearances together on the selected equipment drawings.
04 / QUOTATION SCOPE
Compare a complete attachment package.
Equipment price, crane modifications and site services should be separated so your team knows what is supplied and what remains to be done locally.
Complete grab
Confirm shells, closing mechanism, rope fittings, sheaves, wear parts and stated self-weight.
Crane integration
Identify which drum supports and which drum closes, plus rope sizes, controls, travel and approved connection dimensions.
Commercial boundary
Agree drawings, inspection records, spare parts, export packing, delivery and any site commissioning service.
05 / ORDERING & DELIVERY
Approve the selected unit before manufacture.
The offer should connect your load data to one drawing, one equipment schedule and a clear inspection and handover plan. Production and freight dates are confirmed for that selected configuration.
Request these documents with the offer
- S0525 or selected-unit arrangement drawing
- Confirmed bucket self-weight and maximum loaded mass
- Support and closing rope diagram
- Open width, closed height and hopper clearance
- Inspection and operating documents
- Spare-parts and maintenance list
List the destination standards and customer witness points before finalising the acceptance plan.
- 01
Application review
Confirm load, crane interface, environment, operating sequence and buyer requirements.
- 02
Drawing approval
Approve dimensions, self-weight, selected components, controls and site responsibilities.
- 03
Build and inspect
Complete the agreed functional and load-case checks, records and packing.
- 04
Deliver and commission
Coordinate transport, unloading, installation checks, operator instruction and handover.
Ask for one configured unit
Single-unit enquiries are welcome. The written offer confirms the selected design's minimum order and exactly what is supplied.
Specify the destination
State applicable market and customer requirements. The offer lists the documents, inspections and tests available for the selected unit.
A project schedule in writing
Drawing approval, production, inspection and shipping are separate milestones. A dated delivery programme follows the selected configuration.
WARRANTY & AFTER-SALES
Know the support terms before shipment.
Agree the warranty period and start date, covered components, replacement parts, installation guidance and any on-site service in the signed offer.
Ask for support termsMatch the crane interface
Assign who supplies power, rope, hook connection, controls, rigging and commissioning equipment.
Test the stated load case
Agree inspection and functional checks around the material and lift the attachment was selected for.
Maintain the installed unit
Record the final model, serial number and wear parts so replacement components fit the supplied configuration.
06 / RELATED EQUIPMENT
View the full attachment range Compare the attachments that fit your load.
FOUR-ROPE / BULK MATERIAL
Four-Rope Clamshell Grab Bucket
Load loose bulk material with separate supporting and closing ropes.
View product ↗SINGLE-ROPE / RELEASE SEQUENCE
Single-Rope Clamshell Grab Bucket
A single lifting rope simplifies the crane connection, but the bucket's opening sequence becomes the key selection question.
View product ↗
POWERED CLOSING / BULK MATERIAL
Electric Motor Clamshell Grab Bucket
An electric or motor-driven clamshell closes under powered control instead of relying only on a separate closing-rope drum.
View product ↗07 / BUYER QUESTIONS
Questions to settle before buying.
Use these answers to prepare one technical and commercial brief for the selected unit.
Discuss this attachmentDoes S0525 lift 2.5 t of cargo on any 5 t crane?
The 2.5 t material mass is tied to the listed density and bucket volume. Add the grab's selected-unit self-weight and check rope and crane ratings before approving the lift.
What is the difference from a four-rope grab?
The example uses one support and one closing rope; a four-rope arrangement has separate pairs. The crane and controls must suit the exact rope system.
Can I retain my existing ropes?
Only if rope diameter, construction, length, reeving and condition match the approved grab and crane design. Send drawings and photos for review.
Which dimensions matter most?
The open shell width, closed bucket height, lifting head and required rope travel decide whether the bucket reaches the material and clears the hopper.
How are delivery and warranty confirmed?
The written offer identifies the chosen configuration, production milestones, packing, inspection, warranty period and after-sales scope.
YOUR EQUIPMENT BRIEF
Request a Two-rope grab technical offer.
Send the existing crane's hoist drawings, support and closing rope sizes, load rating, available lift height and the bulk cargo's density and target cycle. The selected drawing and commercial offer can then identify the attachment, crane interface, documents, delivery and support.
Send my attachment enquiry ↗Include these project details
- 01 Bulk material and measured density
- 02 Target mass per cycle and daily operating hours
- 03 Crane rating and two-rope hoist drawing
- 04 Rope size, reeving and available travel
- 05 Pickup depth and hopper dimensions
- 06 Destination and required acceptance documents
Two-rope grabSelected for your load
Get a quotation ↗