Three-Chuck Tube Laser Cutting Machine

STR GT · Coordinate gripping, support and the final section.

Review how the tube stays controlled through the handoff.

For a three-chuck tube laser, the important questions extend beyond the number of grips: how the stock transfers between them, how a long finished part stays supported, and what can be cut from the last usable section. Match the STR GT proposal to your actual tube drawings, lengths, wall thicknesses and production route.

STR GT catalogue machine with a long horizontal bed, central processing housing and end rotary units — Original GT catalogue reference identified as three-chuck type in the STR menu. Supplied layout and functions require the technical proposal.

View GT configuration requirements

STR GT catalogue image. The detail views enlarge areas of this same image; confirm the supplied chuck movement, support and handling package in the technical proposal.

STR GT Three-Chuck Tube Laser Cutter

Select the clamping sequence around the part you need to release.

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Brand: LSENTR / STR
Series reference: STR GT · Three-chuck tube cutting
Manufacturer: Jinan STR Equipment Co., Ltd.
Machine structure: Three-chuck type; ordered layout and travel defined in the GT proposal
Processing method: Fiber laser tube/profile cutting; features reviewed from your drawing
Workpiece envelope: Section, wall, stock length, part length and mass matched to the offered build
Gripping & handling: Review grip transfer, support, part recovery and end-of-bar sequence
Laser & options: Source/head, gas, control, software and loading scope specified for the application

Bring the last part as well as the first.

Send a representative nest and the longest finished part. Mark critical features, gripping-sensitive surfaces and the quality required after any grip transfer.

Review location and orientation across the transfer.
Match support to both stock and released parts.
Compare accepted parts per bar and complete cycle time.

What to evaluate in a three-chuck tube system

A three-chuck arrangement offers another grip to coordinate within the cutting sequence. Its value depends on where the grips can move, how location is preserved during a transfer, and whether the outgoing tube or part remains supported as the usable stock becomes shorter.

Long finished parts

Review the part's support and recovery path separately from the maximum incoming bar length. A bar that can be loaded does not establish the length that can be recovered to the required quality.

Work near the end of a bar

Review grip clearance and the actual final cutting sequence. Establish the remaining-length definition for the proposed jaws, profile and part geometry.

Location through a grip change

Include hole spacing, face orientation and end features that cross the transfer stage. Check the released part against its datums, rather than judging only a chuck-motion demonstration.

Choose from the complete route

Define the tube and the part
Section, material, wall, length, mass and critical datums.
Review the grip sequence
Locate, transfer, cut the final section and release.
Trial a representative nest
Inspect first, transfer-stage and final pieces.
Compare accepted output
Include loading, recovery, sorting and setup.

Define the GT build before comparing capacities

Use a configuration sheet tied to the ordered model and revision. The STR catalogue identifies the GT image with the three-chuck type; numeric capacities and included options need to be established for the actual offered machine.

Configuration item	What the technical offer should define
Model and chuck arrangement	GT model/revision, chuck locations and travel, gripping method, jaw options and transfer sequence.
Section and wall range	Qualified shapes and outside dimensions, wall range, corner geometry and rotating envelope.
Length and mass	Incoming stock, finished-part recovery, load conditions and support requirements for each relevant section.
End-of-bar processing	Required grip/clearance reserve, permitted final operations, remaining-length definition and how the offcut is recovered.
Laser and programming	Source/head, gas, control and software functions, licenses, drawing formats and nesting scope.
Handling and protection	Loading, support and unloading equipment; operator/service access, guarding and site layout.
Acceptance and supply	Test drawings/material, part measurements, full-cycle timing, utilities, commissioning and support responsibilities.

No numerical GT diameter, length, mass, power, speed, accuracy or minimum-tail range is established by the current catalogue reference. Ask for the GT-specific technical proposal and test conditions.

Follow the workpiece through a grip transfer

STR GT three-chuck catalogue reference with a long bed and central processing housing

The transfer is part of the process

Map which grip locates the tube at each stage, when another grip establishes contact, and what supports the part as it separates. Ask how the proposed system preserves axial position and face orientation through that change.

The catalogue picture does not establish the control sequence, independently moving axes or transfer accuracy. Review those functions against the actual GT build.

Three questions for the sequence review

Choose a stage to see what should be demonstrated. This is a process-review aid, not a GT motion simulation.

Establish the grip and datum

Identify the initial locating grip, jaw contact and section orientation. Check incoming straightness, wall sensitivity and support before the first cut.

Show in the trial: Initial seating and grip, the reference face or seam, and a measured first part.
Record in the proposal: Jaw/tooling identification, supported section range and the approved setup method.

For transfer, demonstrate how the receiving grip establishes location before the preceding grip releases, where the sequence requires it. For final cutting, demonstrate grip clearance, support and recovery of the released part and offcut. Confirm the actual sequence with STR.

Industry context: Bodor's three-chuck mechanism description illustrates how coordinated gripping can be used in a tube process. Its controls, capacities and zero-tail claims do not describe the STR GT configuration.

Separate stock support from finished-part recovery

Incoming tube

Define bar length, mass, section, straightness and initial presentation. Review support positions through feeding and rotation, including non-round sections.

Tube beyond the cutting zone

Review the supported length as more material moves to the outgoing side. Include the actual section and part mass; the number of chucks alone does not establish a load rating.

The moment of separation

Demonstrate where the finished part is held or supported before its final cut releases it. Agree permitted drop, jaw marks, distortion and handling damage.

Short parts and remnants

Check whether the same recovery route handles the smallest parts and end pieces. Record sorting, scrap access and any operator intervention within the timing scope.

Support needs change with section, length and remaining material. Identify follow-up supports, actuation and recovery functions explicitly in the offer; do not infer them from the rendered bed or supports.

A shorter reserve only helps when the nest can use it

Three chucks do not, by themselves, establish zero tail or an extra finished part from every bar. Separate the reserve required by the grip sequence from the actual unused stock after nesting. Part lengths and allowances can leave the same offcut even when the permitted reserve changes.

Compare two hypothetical part lengths

Assume an 8000 mm bar, 20 mm front trim and a simplified 4 mm allowance per part. Compare assumed reserves of 300 and 100 mm. These inputs are arithmetic examples, not GT or G performance values.

300 mm reserve

7 parts

100 mm reserve

7 parts

Blue shows finished-part length only; the remaining track includes trim, allowances and unused stock.

Arithmetic result	300 mm reserve	100 mm reserve
Finished-part length	1000 mm	1000 mm
Part count	7	7
Actual unused stock	952 mm	952 mm

Both assumptions permit seven parts. The smaller reserve produces no extra part in this example.

Count = floor[(bar − front trim − reserve) ÷ (part length + allowance)]. Actual unused stock = bar − front trim − count × (part length + allowance). The 4 mm allowance is invented for the example; it is not a kerf or process setting. The model omits joint geometry, shared cuts, stock defects, transfer restrictions and setup losses. It cannot predict an achievable GT minimum tail or production output.

Request a nesting plan and a complete end-of-bar trial for the actual drawings. Compare accepted part count, reusable remnants and intervention time using the same stock and inspection rules.

Compare G and GT around the same job

Question	G two-chuck review	GT three-chuck review
How is location maintained?	Review the offered two-chuck sequence through feeding, rotation and final operations.	Additionally demonstrate how location is preserved where a grip transfers or the holding arrangement changes.
What happens to a long part?	Check support and recovery for the proposed part length.	Check how the additional grip and offered supports participate in the outgoing-part sequence.
How much material becomes useful parts?	Trial the actual nest, reserve and offcut.	Repeat the same nest and record any difference in accepted parts and reusable remaining stock.
What is included?	Confirm laser, jaws, support, programming and handling.	Confirm the same scope plus the specified transfer functions; three chucks do not establish automation or a bevel head.

Choose from the demonstrated result and commercial scope. An additional chuck is not a universal production-rate or quality guarantee. Discuss the G two-chuck configuration alongside the GT proposal.

Supply the section, wall and orientation together

Stock or feature	Information needed for the application review
Round tube	Outside diameter, wall, grade, length, mass and relevant ovality/straightness. Include weld-bead conditions.
Square and rectangular tube	Both outside dimensions, wall and corner geometry; reference face, seam position and rotating clearance.
Open or special section	Full section and finished-part drawings for explicit jaw contact, support, control and process-access review.
Holes, slots and end joints	Datums, size, position, face relationships and mating geometry; identify which features fall before or after a grip transfer.
Visible or thin-wall parts	Permitted jaw marks, deformation, inside-wall spatter and handling damage, alongside dimensional requirements.

These are review categories, not a qualified GT shape list. Confirm every required section with the offered jaws and software. A round-diameter limit does not define the permitted side length or rotating envelope of a rectangular section.

Material and edge condition

Send the exact steel, stainless or aluminum grade and wall range. Match the source/head and gas process to the specified edge, inside-wall condition and downstream operations through samples.

Seams and faces

Mark the relationship between the weld seam, cosmetic face and critical features. Confirm how orientation is set and checked after a transfer; automatic seam recognition is a function to specify separately.

Include loading, sorting and changeovers in the cycle

Repeated short parts

Review whether setup, loading or sorting dominates the route. Inspect the last parts in the nest and account for scrap removal and operator intervention.

Long fabricated members

Supply maximum finished-part length and mass, critical end forms and required straightness. Review outgoing support, grip release and recovery access.

Mixed sections

Include jaw/support changes, orientation checks, program preparation and the first accepted part after a changeover.

Automation planning

Three chucks do not identify the loading package. Confirm section range, bundle presentation, part lengths, sorting and any remaining manual steps for the offered system.

For loading-specific needs, compare the G-SA and G-A configurations in the tube family. Their catalogue images do not establish compatible GT options.

Inspect first, transfer-stage and final parts

Use the same material lot, drawings, datums and inspection method when comparing builds. Record the machine revision, jaws/support, laser/head, gas, software and actual sequence.

Test item	What to inspect or record
Initial parts	Length, end shape, hole/slot positions, face orientation and jaw marks against the approved drawing.
Features across the transfer	Position and angular relationships on the same part before and after the holding arrangement changes.
Longest outgoing part	Supported release, straightness/twist, end quality and recovery without unacceptable distortion or damage.
Final usable section	Completed geometry, reserve/clearance conditions, actual offcut, accepted count and interrupted or rejected pieces.
Wall and seam regions	Edge condition, inside-wall spatter, corners, local bead and any cleanup needed before assembly or coating.
Complete route	Setup, loading, cutting, transfer, recovery, sorting, finishing, inspection and operator intervention under one timing definition.

Ask for a traceable full-bar trial

A short cutting clip or an axis-repeatability value cannot establish finished-part acceptance through a transfer. Request identifiable samples, measurement records and a video or sequence record covering the entire bar, including the end section.

The GT image shown here is a catalogue reference. No tube sample, production result, certification or measured transfer performance is implied by it.

Plan the complete stock-to-parts footprint

Layout and access

Include machine travel, incoming bars, released parts, staging, lifting, remnant access and service clearance. Obtain the installation drawing for the ordered build.

Utilities and extraction

Confirm electrical input, cooling, gas quality/delivery, extraction and ambient requirements. Laser optical output does not establish total installation power demand.

Operating protection

Review the documented arrangement for gripping/rotating stock, transfers, cutting and recovery. Housing appearance does not establish a laser protection rating or certification.

Shift and material flow

Plan material identification, rejected-piece handling, reusable remnants and collection. Include operator access and maintenance downtime in the production plan.

Maintain the gripping and support chain

Jaws and chuck condition

Use the supplied setup, cleaning, inspection and lubrication instructions. Retain tooling identification and checks relevant to seating, marking and transfer consistency.

Supports and alignment

Inspect contact surfaces and support movement as instructed. When dimensional results change, review stock condition and the complete locating/support chain.

Cutting consumables

Use specified nozzles and protective optics, with the documented gas and cooling conditions. Set replacement and inspection practices from the actual manual and operating evidence.

Service and software

Back up programs and approved settings. Identify included licenses, spare-part references, training, remote support and service responsibilities in the agreement.

Tie the quotation to a defined build and result

Compare the machine, chuck/jaw package, supports, loading/recovery, laser/head, software, auxiliaries and installation scope together. Include representative trial material, inspection criteria, documentation and the destination's requirements in the discussion.

Agree packing, transport, site preparation, commissioning, operator/maintenance training, spare parts, warranty scope and delivery schedule in the dated proposal. Compare the cost of accepted parts over the same operating period, including gas, consumables, labor, sorting and finishing.

Have a profile drawing and a representative nest?

Prepare the GT application review

Questions about a three-chuck tube laser

Are STR GT and the three-chuck catalogue configuration the same reference?

The current STR menu identifies the GT catalogue image as the three-chuck type. This page groups that reference as STR GT Three-Chuck. The exact ordered model, layout and included functions should appear in the technical proposal.

Does a third chuck guarantee zero tail?

No. Establish the actual grip/clearance reserve and permitted end-of-bar sequence for your section and drawings. Nesting can leave more unused stock than that reserve. This page gives no verified numerical GT minimum tail or zero-waste claim.

When should I compare GT with G two-chuck?

Compare both around the same parts when grip transfer, long-part support or the end-of-bar sequence matters to your route. Use a full-bar trial, accepted-part measurements and the complete commercial scope to judge the result.

Can GT recover a part as long as the incoming bar?

Do not infer finished-part recovery from loading length. Confirm the outgoing support, grip-release sequence, accessible travel and accepted length/mass for the offered build.

Are automatic loading, seam detection and bevel cutting included?

Chuck count does not establish any of these options. Specify the required function, compatible section range, sensing/head/control package and acceptance method in the offer.

How should grip-transfer accuracy be checked?

Measure relevant features and face relationships on a part that spans the transfer stage, using agreed drawing datums. Include first, transfer-stage and final parts; axis or chuck repeatability alone does not establish that result.

Which tube sizes, walls and materials are supported?

Send the complete section, grade, wall, stock/part lengths and mass. Confirm the qualified envelope with the actual jaws, supports, laser/head and software. The catalogue image provides no verified numeric GT capacity table.

What should I send for a GT quotation?

Provide profile and part drawings, material/wall, stock and finished-part lengths, mass, a representative nest, critical datums, permitted marks, desired output, loading/recovery preferences and workshop/destination information.

Let's configure your
STR GT laser cutter.

Send the section, wall, stock and part lengths, mass and a representative nest. Mark critical datums, transfer-stage features, recovery needs and the accepted result.

Jinan STR Equipment Co., Ltd.admin@strmachine.com +86 156 9240 8097No. 136 ChouFu Road, Licheng District,
Jinan City, Shandong, China

Prepare and review your requirements summary, then send it through the STR contact page or email. This form does not submit an inquiry.

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