{"id":743,"date":"2026-09-02T09:46:36","date_gmt":"2026-09-02T09:46:36","guid":{"rendered":"https:\/\/steeringcylinder.top\/?post_type=product&p=743"},"modified":"2026-09-02T10:00:31","modified_gmt":"2026-09-02T10:00:31","slug":"truck-crane-main-boom-cylinder","status":"publish","type":"product","link":"https:\/\/steeringcylinder.top\/el\/product\/truck-crane-main-boom-cylinder\/","title":{"rendered":"Truck Crane Main Boom Luffing Cylinder \u2014 \u03a6280\u00d73507mm, 31.5MPa"},"content":{"rendered":"
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Truck Crane Hydraulics | UK B2B Supply<\/span><\/div>\n

Main Boom Angle Cylinder<\/h2>\n

Heavy-duty hydraulic cylinders engineered for main boom luffing and articulation on truck-mounted cranes \u2014 delivering proven performance across UK infrastructure, civil engineering, and port handling operations.<\/p>\n

\ud83d\udce9 Get a Quote Now<\/a><\/p>\n<\/div>\n

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\"MainThe main boom angle cylinder is the structural heart of any truck crane’s lifting geometry. Mounted between the base section and the main boom, this hydraulic actuator controls the luffing angle \u2014 raising or lowering the boom to position loads precisely, safely, and repeatedly across demanding site conditions. Unlike general-purpose cylinders, a dedicated main boom angle cylinder must sustain enormous bending moments at full extension, resist dynamic shock loading from sudden load swings, and maintain seal integrity under prolonged duty cycles in wind, rain, and temperature extremes common across the UK and Northern Europe. Our HCYY11112021 series is purpose-built to meet these requirements, combining deep-bore precision machining, high-grade piston rod chrome plating, and multi-lip sealing systems that consistently perform where off-the-shelf components fail.<\/p>\n

\u2709 Send Enquiry: sales@steeringcylinder.top<\/a><\/div>\n<\/div>\n
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Technical Specifications<\/h2>\n

Model HCYY11112021 \u2014 Main Boom Angle Cylinder<\/p>\n

\"Main<\/div>\n
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Cylinder Model<\/th>\nSpecifications<\/th>\nWorking Pressure<\/th>\nMaximum Withstand Pressure<\/th>\nTrip (mm)<\/th>\nInstallation Distance (mm)<\/th>\nWeight<\/th>\n<\/tr>\n<\/thead>\n
HCYY11112021<\/td>\n\u03a6280 \u00d7 \u03a6250 \u00d7 3507<\/td>\n31.5 MPa<\/td>\n39 MPa<\/td>\n3507<\/td>\n4218<\/td>\n1155 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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Working Principle, Materials & Application Scenarios<\/h2>\n
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\u2699<\/div>\n

Operating Principle<\/h3>\n

The main boom angle cylinder operates as a double-acting hydraulic actuator. High-pressure hydraulic oil supplied at up to 31.5 MPa enters the blind-end port to extend the piston rod, raising the boom. Oil entering the rod-end port retracts the cylinder, lowering the boom under controlled load. A precision-machined piston converts fluid pressure into linear force that directly counteracts the gravitational moment of the loaded boom. Internal cushioning chambers at both ends of the stroke absorb end-of-travel kinetic energy, eliminating metal-to-metal impact and protecting the crane’s structural frame from fatigue loading. Integrated load-holding check valves within the cylinder circuit maintain boom position even if a hose fails downstream, satisfying LOLER 1998 safety requirements applicable to crane operations across the United Kingdom.<\/p>\n<\/div>\n

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\ud83d\udd28<\/div>\n

Material & Construction<\/h3>\n

The cylinder barrel is honed from cold-drawn seamless steel tube with an internal roughness of Ra 0.4 or better. The piston rod \u2014 250 mm diameter \u2014 is forged from 42CrMo4 alloy steel, hardened and tempered to 900\u20131,000 MPa tensile strength, then hard-chrome plated to a minimum 25 \u03bcm depth and micro-finished to Ra 0.2. The result is a surface that resists pitting corrosion from salt-laden coastal air and abrasive grit common on UK construction sites. End caps are precision-machined from high-tensile steel forgings, and all threaded connections are sealed with anaerobic thread-locking compound to prevent loosening under vibration. Multi-stage polyurethane and PTFE composite seal sets maintain rated performance across -30\u00b0C to +120\u00b0C, covering the full range of UK seasonal operation.<\/p>\n<\/div>\n

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\ud83c\udfd7<\/div>\n

Application Scenarios<\/h3>\n

The HCYY11112021 main boom angle cylinder is deployed across a wide range of heavy lifting and infrastructure contexts in the United Kingdom. Civil engineering contractors rely on it for bridge beam installation along the M25 and major A-road upgrades. Port handling operations at Felixstowe, Southampton, and Tilbury use these cylinders on ship-to-shore crane booms handling containerised cargo. Offshore wind construction vessels operating from Grimsby and Aberdeen depend on them for turbine component lifts. Demolition firms carrying out urban regeneration projects across London, Manchester, and Birmingham specify these cylinders for high-reach hydraulic boom arms. Precast concrete erection in housebuilding and commercial construction also frequently requires the precise angular control that only a high-quality main boom angle cylinder can deliver consistently.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Why Choose Our Main Boom Angle Cylinder<\/h2>\n
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\ud83d\udcc8<\/div>\n

39 MPa Burst Rating<\/h4>\n

Maximum withstand pressure of 39 MPa provides a substantial safety margin above the 31.5 MPa working pressure, critical for surge events during emergency stops or dynamic load swings on site.<\/p>\n<\/div>\n

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\ud83d\udd04<\/div>\n

3,507 mm Full Stroke<\/h4>\n

The generous 3,507 mm stroke accommodates wide luffing ranges demanded by modern long-boom truck cranes, enabling broad angular sweep without intermediate re-rigging or repositioning delays.<\/p>\n<\/div>\n

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\ud83c\udf1f<\/div>\n

Hard-Chrome Piston Rod<\/h4>\n

A minimum 25 \u03bcm hard-chrome deposit on the 250 mm diameter piston rod resists the corrosive, grit-laden environments of coastal UK worksites, extending service intervals and reducing seal replacement frequency.<\/p>\n<\/div>\n

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\ud83d\udee0<\/div>\n

Custom OEM Capability<\/h4>\n

Our engineering team supports full OEM customisation including mounting eye dimensions, port positions, cushioning configurations, and surface treatment options, all validated against your crane’s hydraulic circuit data sheets before production commences.<\/p>\n<\/div>\n

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\u2696<\/div>\n

Full Test Documentation<\/h4>\n

Every cylinder ships with a hydrostatic pressure test certificate, dimensional inspection report, and EN 10204 3.1 material traceability records that satisfy UK crane inspection bodies and LOLER compliance audits without additional third-party testing.<\/p>\n<\/div>\n

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\ud83d\ude9a<\/div>\n

Reliable UK Logistics<\/h4>\n

Working with established freight forwarders through Felixstowe and Tilbury ports, we deliver main boom angle cylinders to plant hire depots, OEM assembly lines, and workshop facilities across England, Scotland, and Wales on competitive lead times with full cargo tracking.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Cylinder Series for Truck Cranes<\/h2>\n

Our comprehensive truck crane cylinder range covering boom extension, luffing, outrigger, and slewing circuits.<\/p>\n

\"Complete<\/div>\n
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\ud83d\udd27<\/div>\n

Compact Forklift Attachment Hydraulic Cylinder<\/h3>\n

Engineered for tight-clearance forklift attachment applications, delivering precise force output in a compact envelope suited to side-shifters, rotators, and clamp assemblies.<\/p>\n

View Product \u2192<\/a><\/p>\n<\/div>\n

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Medium-Duty Forklift Attachment Hydraulic Cylinder<\/h3>\n

A step up in bore and stroke capacity, this medium-duty variant handles higher tonnage attachments including bale clamps, drum handlers, and paper roll clamps where compact cylinders reach their limits.<\/p>\n

View Product \u2192<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Customer Success Cases<\/h2>\n

Real-world results from verified buyers across the UK and Europe.<\/p>\n

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CASE STUDY<\/div>\n

Offshore Wind Installation \u2014 East of England<\/h3>\n

A specialist heavy-lift marine contractor based in Grimsby, operating jack-up installation vessels in the North Sea, approached us after repeated seal failures on third-party main boom angle cylinders during turbine monopile installation campaigns. Salt spray, continuous wave-induced vibration, and temperature cycling from sub-zero winter nights to heated hydraulic oil had degraded competitor seal sets within 800 operating hours. After switching to our HCYY11112021 cylinders with upgraded composite seal packages, the contractor recorded zero seal failures over a subsequent 2,400-hour installation programme covering 47 turbine foundations. Downtime attributed to cylinder issues dropped from an average 4.2 hours per turbine to nil, saving an estimated \u00a3180,000 in vessel standby charges across the campaign. The engineering team noted the quality of test documentation also simplified their LOLER inspection submissions considerably.<\/p>\n

\"Main<\/p>\n<\/div>\n

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2,400h<\/div>\n
Fault-free operation<\/div>\n
\u00a3180k<\/div>\n
Standby cost saved<\/div>\n
0<\/div>\n
Seal failures<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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\u2605\u2605\u2605\u2605\u2605<\/div>\n

“We’ve sourced main boom cylinders from multiple suppliers over the years, and the build quality here is clearly on another level. The piston rod finish is exceptional, and the documentation package saved us two days of back-and-forth with our inspection body. Strongly recommended for anyone running truck crane fleets in the UK.”<\/p>\n

\u2014 Procurement Manager<\/div>\n
Plant Hire & Crane Rental Company, West Midlands, UK<\/div>\n<\/div>\n
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\u2605\u2605\u2605\u2605\u2605<\/div>\n

“We needed a custom installation distance to match our German-manufactured crane chassis. The engineering team engaged with our hydraulic schematics directly, adjusted the trunnion mount dimensions, and delivered a bespoke unit within the agreed schedule. The cylinder has been in service on port crane duty at Tilbury for eight months without a single issue.”<\/p>\n

\u2014 Chief Engineer<\/div>\n
Port Equipment Services Ltd, Essex, UK<\/div>\n<\/div>\n
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\u2605\u2605\u2605\u2605\u2605<\/div>\n

“Price was competitive, lead time was realistic and they actually hit it, and the quality matched the datasheet. We’ve now standardised on this model for our entire 14-crane fleet undergoing overhaul. Getting consistent parts from a supplier who understands crane hydraulics makes a genuine difference to workshop planning.”<\/p>\n

\u2014 Workshop Director<\/div>\n
Civil Engineering Contractor, Yorkshire, UK<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Factory Capability & Custom Engineering<\/h2>\n
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\ud83c\udfed Manufacturing Depth<\/h4>\n

Our dedicated large-bore cylinder manufacturing facility operates CNC deep-hole boring machines capable of processing cylinder barrels up to 500 mm bore diameter and 8,000 mm length. A climate-controlled honing bay maintains Ra 0.4 surface finish across the full bore length regardless of ambient temperature variation \u2014 critical for consistent seal performance in field conditions. Annual production capacity exceeds 3,000 large-bore crane cylinders, with dedicated lines for main boom angle, boom extension, outrigger, and jib cylinders.<\/p>\n<\/div>\n

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\u2699 Custom Product Services<\/h4>\n

We provide full OEM and MRO customisation: non-standard bore\/rod combinations, alternative port locations and thread standards (BSP, NPT, Metric), custom clevis or trunnion mounting geometries, modified cushioning profiles, and position-sensor integration for smart crane systems. Our engineering team works from client-supplied CAD data, hydraulic circuit diagrams, or simply from measurements taken from a unit being replaced. Prototype lead times from confirmed drawing to hydrostatic-tested unit typically run four to six weeks for first articles.<\/p>\n<\/div>\n

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\ud83d\udccb Quality & Compliance<\/h4>\n

Production is governed by ISO 9001:2015 quality management and every cylinder undergoes 100% hydrostatic pressure testing to 1.5x working pressure minimum. Material certificates to EN 10204 3.1 are available on request. For UK customers operating under PSSR 2000 and LOLER 1998, we provide full documentation packages aligned with these requirements, simplifying your own compliance obligations with HSE and accredited inspection bodies.<\/p>\n<\/div>\n<\/div>\n

\ud83d\udce9 Get a Custom Quote \u2014 sales@steeringcylinder.top<\/a><\/div>\n<\/div>\n
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Frequently Asked Questions<\/h2>\n

Common questions from UK crane operators, plant hire managers, and procurement teams.<\/p>\n

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\nWhat is the price range for a main boom angle cylinder suitable for a 50-tonne truck crane, and how do I get a quote from a UK-based supplier?
\n\u25bc<\/span><\/summary>\n
Pricing for a main boom angle cylinder in the 50-tonne truck crane class varies based on bore diameter, stroke length, pressure rating, and whether a standard or customised mounting geometry is required. For a reference model like the HCYY11112021 \u2014 \u03a6280 \u00d7 \u03a6250 \u00d7 3,507 mm at 31.5 MPa working pressure \u2014 the unit cost reflects precision forged piston rods, deep-bore honed barrels, and full hydrostatic test documentation. Lead time and quantity also influence final pricing for B2B procurement, with better rates available on orders of two units or more. To receive an accurate quote tailored to your specific crane make and model, please email sales@steeringcylinder.top<\/a> with your cylinder dimensions or the crane serial number, and our technical sales team responds within one working day. We serve buyers across England, Scotland, and Wales and can arrange UK-cleared delivery directly to your depot or workshop.<\/div>\n<\/details>\n<\/div>\n
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\nHow long does it take to deliver a replacement main boom angle cylinder to a crane workshop in the UK, and what shipping options are available?
\n\u25bc<\/span><\/summary>\n
Standard in-stock cylinder models typically ship from our factory within five to seven working days, with arrival at UK workshops via Felixstowe or Tilbury within three to five additional working days depending on freight routing and customs clearance. For urgent crane breakdowns, we can arrange air freight for lighter components or an expedited sea-air combination service for full-size units such as the 1,155 kg HCYY11112021. Custom-specification cylinders require additional manufacturing lead time \u2014 generally four to six weeks for first-article prototypes and two to three weeks for repeat custom orders where tooling already exists. All shipments include full cargo tracking and are accompanied by commercial invoices and technical documentation cleared for UK import. Contact sales@steeringcylinder.top<\/a> with your urgency level and delivery postcode, and we will confirm the fastest available option with firm transit dates.<\/div>\n<\/details>\n<\/div>\n
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\nWhich seal material is best for a main boom angle cylinder operating on offshore wind installation vessels in the North Sea where salt water and extreme temperature swings are factors?
\n\u25bc<\/span><\/summary>\n
For North Sea offshore conditions, we recommend our composite polyurethane and PTFE seal combination, which is fitted as standard on HCYY11112021 units specified for marine applications. Polyurethane dynamic seals handle the mechanical loading cycle far better than standard NBR under continuous wave-induced vibration, while PTFE guide rings maintain dimensional stability from -30\u00b0C through to the +120\u00b0C temperatures that develop in trapped hydraulic oil during extended holds. The wiper seal assembly uses a double-lip design to exclude salt spray and fine abrasive particles from reaching the primary sealing surface \u2014 a critical detail for cylinders exposed to the spray environment on deck-mounted crane booms. Seal life in offshore conditions is typically two to three times longer with this composite arrangement compared with standard mineral-rubber seal sets. If you are re-sealing an existing cylinder rather than replacing the whole unit, we can supply a full service kit matched to your bore and rod dimensions \u2014 please enquire at sales@steeringcylinder.top<\/a>.<\/div>\n<\/details>\n<\/div>\n
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\nCan you supply a custom main boom angle cylinder with a non-standard bore size and modified trunnion mounting to fit a Liebherr truck crane being overhauled at a depot in Manchester?
\n\u25bc<\/span><\/summary>\n
Yes \u2014 custom main boom angle cylinders for specific crane chassis including Liebherr, Grove, Tadano, Manitowoc, Terex, and other major brands are a core part of our service offering, not an exception. Our engineering team works from cylinder dimensions taken directly from the unit being replaced, from the crane manufacturer’s drawing number if available, or from a measured survey carried out by your own workshop team. For a Liebherr overhaul project in Manchester, we would need: the existing cylinder’s bore diameter, rod diameter, collapsed and extended lengths, mounting style (trunnion centre dimensions, pin diameters, and eye width), port thread specification (BSP or Metric), and the working pressure rating stamped on the original nameplate. Send these details to sales@steeringcylinder.top<\/a> and we will provide a detailed technical proposal with pricing and lead time within two to three working days, including a dimensional drawing for your approval before production begins.<\/div>\n<\/details>\n<\/div>\n
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\nWhat documentation do I need from a main boom angle cylinder supplier to satisfy LOLER 1998 and PSSR 2000 compliance requirements for crane inspection in the UK?
\n\u25bc<\/span><\/summary>\n
For LOLER 1998 compliance in Great Britain, inspecting engineers typically require confirmation that lifting equipment hydraulic components meet the declared working pressure and have been proof-tested \u2014 which our hydrostatic test certificates provide at a minimum of 1.5 times working pressure, with witnessed test data. Under PSSR 2000, pressure-containing components must have appropriate written schemes of examination and material traceability. We supply EN 10204 3.1 material certificates for cylinder barrels and piston rods, dimensional inspection reports showing key manufacturing tolerances, hydrostatic pressure test records, and a product data sheet specifying design pressure, test pressure, temperature range, and applicable operating conditions. If your accredited inspection body \u2014 whether LEEA-member or an insurer’s appointed engineer \u2014 requires a specific evidence format or additional confirmations such as weld procedure records, please share their checklist at the time of enquiry. We routinely accommodate UK inspection body requirements and can confirm what is available before order placement, avoiding delays at the inspection stage.<\/div>\n<\/details>\n<\/div>\n
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\nWhere can I find a cost-effective and reliable main boom angle cylinder supplier for port handling crane maintenance projects based in the South East of England?
\n\u25bc<\/span><\/summary>\n
For port handling crane maintenance programmes in the South East \u2014 whether at Tilbury, Sheerness, Medway, or Southampton \u2014 we supply main boom angle cylinders directly from our factory to your crane workshop or site laydown area via established freight routes through Felixstowe port. Pricing is highly competitive against European OEM replacement parts, with no sacrifice on quality: all cylinders carry full material traceability and hydrostatic test certification. We have supplied port maintenance contractors in the Thames Estuary region and are familiar with the operational patterns and equipment types common in South East port environments, including ship-to-shore gantry cranes, mobile harbour cranes, and floating crane vessels. For a cost-per-unit comparison against your current supplier, send your existing cylinder specifications to sales@steeringcylinder.top<\/a> \u2014 we will provide a firm, detailed price within two working days with no obligation to proceed.<\/div>\n<\/details>\n<\/div>\n<\/div>\n
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Ready to Source Your Main Boom Angle Cylinder?<\/h3>\n

UK B2B enquiries welcome \u2014 technical support, custom engineering, and competitive pricing for crane operators and OEMs nationwide.<\/p>\n

\ud83d\udce9 Contact Us: sales@steeringcylinder.top<\/a><\/p>\n<\/div>\n<\/div>\n

edit by gzl<\/p>","protected":false},"excerpt":{"rendered":"

Heavy-duty main boom angle cylinder HCYY11112021 \u2014 \u03a6280\u00d7\u03a6250\u00d73507mm, 31.5 MPa working pressure, 1,155 kg, designed for UK truck crane operators. Custom engineering, LOLER-compliant documentation. Request a quote today.<\/p>","protected":false},"featured_media":745,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[15],"product_tag":[],"class_list":["post-743","product","type-product","status-publish","has-post-thumbnail","product_cat-uncategorized","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/steeringcylinder.top\/el\/wp-json\/wp\/v2\/product\/743","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/steeringcylinder.top\/el\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/steeringcylinder.top\/el\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/steeringcylinder.top\/el\/wp-json\/wp\/v2\/comments?post=743"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/steeringcylinder.top\/el\/wp-json\/wp\/v2\/media\/745"}],"wp:attachment":[{"href":"https:\/\/steeringcylinder.top\/el\/wp-json\/wp\/v2\/media?parent=743"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/steeringcylinder.top\/el\/wp-json\/wp\/v2\/product_brand?post=743"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/steeringcylinder.top\/el\/wp-json\/wp\/v2\/product_cat?post=743"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/steeringcylinder.top\/el\/wp-json\/wp\/v2\/product_tag?post=743"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}