{"id":3989,"date":"2026-07-02T06:12:08","date_gmt":"2026-07-02T06:12:08","guid":{"rendered":"https:\/\/agriculturalgearboxes.top\/?post_type=product&p=3989"},"modified":"2026-07-07T05:16:53","modified_gmt":"2026-07-07T05:16:53","slug":"hc-rc81-lawn-mower-series-gearbox","status":"publish","type":"product","link":"https:\/\/agriculturalgearboxes.top\/hi\/product\/hc-rc81-lawn-mower-series-gearbox\/","title":{"rendered":"HC-RC81 Lawn Mower Series Gearbox"},"content":{"rendered":"
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Agricultural Gearbox Series<\/span><\/div>\n

HC-RC81 Lawn Mower Series Gearbox<\/h2>\n

High-Torque Rotary Cutter Drive Solution for UK Farm Machinery & Heavy-Duty Agricultural Equipment<\/p>\n<\/div>\n

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Home \u203a Agricultural Gearboxes \u203a Rotary Cutter Gearboxes \u203a HC-RC81<\/span><\/div>\n
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\"\u0915\u0943\u0937\u093f The HC-RC81 agricultural gearbox is a purpose-engineered rotary cutter drive unit designed for continuous, heavy-duty operation across UK farms, groundskeeping estates, and professional land maintenance operations. With dual gear ratios of 1:1.93 and 1:146, an 80 HP power rating, and a robust 1 3\/8″ Z6 taper spline input\/output interface, this gearbox bridges the gap between tractor PTO output and the cutting demands of commercial rotary mowers, flail attachments, and multi-purpose cultivation equipment. Its compact, precision-machined housing is engineered to absorb shock loads, resist ingress, and deliver consistent power transfer even under prolonged field operation \u2014 making it a first-choice component for UK machinery builders and farm equipment importers seeking reliable performance from spring through late-season cuts.<\/p>\n

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\ud83d\udce7 Get a Quote \u2014 HC-RC81 Gearbox<\/a><\/div>\n<\/div>\n

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Why the HC-RC81 Stands Out in UK Agricultural Markets<\/h2>\n
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\u2699<\/div>\n

Dual Ratio Flexibility<\/h3>\n

Selectable 1:1.93 or 1:146 ratios let operators fine-tune blade speed to terrain and crop density without changing equipment.<\/p>\n<\/div>\n

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\ud83d\udd27<\/div>\n

80 HP Rated Power<\/h3>\n

Handles high-horsepower mid-range tractors common across UK farms, delivering full torque at 600 rpm rated input speed.<\/p>\n<\/div>\n

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\ud83d\udcc8<\/div>\n

Precision-Ground Gears<\/h3>\n

Module 5.5\/7.0 helical gear sets reduce noise and wear, extending service intervals across demanding seasonal workloads.<\/p>\n<\/div>\n

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\ud83d\udd17<\/div>\n

Universal Spline Interface<\/h3>\n

1 3\/8″ Z6 taper spline input\/output ensures compatibility with standard UK PTO shaft configurations and most OEM cutter decks.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Technical Specifications \u2014 HC-RC81<\/h2>\n

All parameters verified from factory datasheet. Specifications subject to update; contact us to confirm before order placement.<\/p>\n

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\n\n\n\n\n\n\n\n\n\n\n\n\n
\u092a\u0948\u0930\u093e\u092e\u0940\u091f\u0930<\/th>\n\u0935\u093f\u0928\u093f\u0930\u094d\u0926\u0947\u0936<\/th>\n<\/tr>\n<\/thead>\n
\u0935\u0938\u094d\u0924\u0941<\/td>\nHC-RC81<\/td>\n<\/tr>\n
\u0905\u0928\u0941\u092a\u093e\u0924<\/td>\n1:1.93 \/ 1:146<\/td>\n<\/tr>\n
\u0926\u093e\u0901\u0924<\/td>\n27\/14 \/ 19\/13<\/td>\n<\/tr>\n
\u092e\u0949\u0921\u094d\u092f\u0942\u0932<\/td>\n5.5 \/ 7.0<\/td>\n<\/tr>\n
Power (HP)<\/td>\n80<\/td>\n<\/tr>\n
\u0907\u0928\u092a\u0941\u091f \u0936\u094d\u0930\u0947\u0923\u0940 \u0928\u093f\u0930\u094d\u0927\u093e\u0930\u0923<\/td>\n600 rpm<\/td>\n<\/tr>\n
\u0907\u0928\u092a\u0941\u091f\/\u0906\u0909\u091f\u092a\u0941\u091f \u0935\u093f\u0935\u0930\u0923<\/td>\n1 3\/8″ Z6 Taper Spline<\/td>\n<\/tr>\n
Weight (N.W.)<\/td>\n28.7 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Engineering Drawing<\/p>\n

\"HC-RC81<\/p>\n<\/div>\n<\/div>\n

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Engineering Principles, Materials & Operating Environment<\/h2>\n
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Gear Geometry & Power Transfer<\/h3>\n

The HC-RC81 operates on a right-angle bevel gear drive principle, converting tractor PTO rotation through a hardened spiral bevel pair before stepping the output speed down to drive the rotary cutter blade hub. The dual module options (5.5 and 7.0) reflect varying tooth strength requirements based on input torque. Larger module gears carry higher loads with improved resistance to pitting and surface fatigue \u2014 critical for UK clay-heavy soils and dense grass conditions where shock loading events are routine. The gear mesh is precision-lapped to minimise backlash, keeping blade speed stable and reducing vibration transmitted to the cutter deck frame. The overall drive path is short and stiff, maximising mechanical efficiency and minimising heat build-up during extended cutting runs throughout the UK summer season.<\/p>\n<\/div>\n

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Housing & Material Construction<\/h3>\n

The main housing is cast from high-strength grey iron, chosen for its excellent vibration-damping characteristics and dimensional stability under thermal cycling. Internal bearing bores are machined to H7 tolerance, ensuring consistent radial clearance for the taper roller bearings that support the input and output shafts. All gear blanks are cut from alloy steel (typically 20CrMnTi or equivalent) before carburising and case-hardening to HRC 56\u201362, giving a tough, wear-resistant tooth surface over a ductile core that resists fracture when striking buried stones \u2014 a common occurrence on UK grassland and arable farms. Oil seals are dual-lip NBR, compatible with standard ISO VG 220 gear oils and rated for operating temperatures encountered in British field conditions across all four seasons.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Where the HC-RC81 Agricultural Gearbox Works<\/h2>\n

\"\u0915\u0943\u0937\u093f<\/p>\n

From roadside verge management contracts in rural England to large-scale arable stubble mulching in Scotland, this agricultural gearbox fits a broad range of UK and international working environments. Its compact footprint suits both OEM new-build programmes and field replacement on existing cutter decks.<\/p>\n

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\ud83c\udf3f<\/p>\n

Rotary Cutter Decks<\/h4>\n

Primary drive for single- and multi-blade rotary mowers on UK farm tractors from 60\u2013100 HP.<\/p>\n<\/div>\n

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\ud83c\udf4f<\/p>\n

Sugarcane Harvesting<\/h4>\n

Suited to \u0909\u091a\u094d\u091a \u0915\u094d\u0937\u092e\u0924\u093e \u0935\u093e\u0932\u0947 \u0917\u0928\u094d\u0928\u093e \u0939\u093e\u0930\u094d\u0935\u0947\u0938\u094d\u091f\u0930\u094b\u0902 \u0915\u0947 \u0932\u093f\u090f \u0938\u091f\u0940\u0915 \u090f\u0932\u093f\u0935\u0947\u091f\u0930 \u0938\u094d\u0932\u0940\u0935 \u0917\u093f\u092f\u0930\u092c\u0949\u0915\u094d\u0938<\/a> and related harvester drive trains globally.<\/p>\n<\/div>\n

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\ud83d\ude97<\/p>\n

Base Cutter Systems<\/h4>\n

Directly applicable as a drop-in solution for the \u0917\u0928\u094d\u0928\u0947 \u0915\u0940 \u0915\u091f\u093e\u0908 \u092e\u0936\u0940\u0928\u094b\u0902 \u0915\u0947 \u0932\u093f\u090f \u092c\u0947\u0938 \u0915\u091f\u0930 \u0917\u093f\u092f\u0930\u092c\u0949\u0915\u094d\u0938: \u0938\u092c\u0938\u0947 \u0915\u0920\u093f\u0928 \u0915\u091f\u093e\u0908 \u0915\u0947 \u0932\u093f\u090f \u0938\u091f\u0940\u0915 \u0936\u0915\u094d\u0924\u093f<\/a> requirements.<\/p>\n<\/div>\n

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\ud83c\udf70<\/p>\n

Flail Mulchers<\/h4>\n

Powers the rotor input shaft of tractor-mounted flail mulchers used on UK motorway verges, estates, and golf courses.<\/p>\n<\/div>\n

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\ud83c\udf3f<\/p>\n

Stubble Cultivation<\/h4>\n

Handles post-harvest stubble cutting on UK cereal farms where residue management is critical before autumn drilling.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Performance Advantages Built for British Field Conditions<\/h2>\n
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01<\/p>\n

Compact, Lightweight Build<\/h4>\n

At 28.7 kg net, the HC-RC81 agricultural gearbox keeps cutter deck centre of gravity low, reducing rear-end lift on compact UK tractors working on slopes.<\/p>\n<\/div>\n

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02<\/p>\n

Long Service Intervals<\/h4>\n

Hardened gear surfaces and sealed bearing arrangements significantly reduce routine maintenance requirements during peak UK cutting seasons.<\/p>\n<\/div>\n

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03<\/p>\n

OEM-Grade Tolerances<\/h4>\n

Machined to the same dimensional standards used by European cutter deck manufacturers, ensuring drop-in fit on most established UK OEM and aftermarket platforms.<\/p>\n<\/div>\n

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04<\/p>\n

Reliable Seal System<\/h4>\n

Double-lip shaft seals keep moisture and field debris out \u2014 particularly important given the wet, muddy operating conditions typical of English and Welsh grassland management.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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\u0939\u092e\u093e\u0930\u0940 \u0935\u093f\u0928\u093f\u0930\u094d\u092e\u093e\u0923 \u0938\u0941\u0935\u093f\u0927\u093e \u0914\u0930 \u0905\u0928\u0941\u0915\u0942\u0932\u093f\u0924 \u0907\u0902\u091c\u0940\u0928\u093f\u092f\u0930\u093f\u0902\u0917 \u0915\u094d\u0937\u092e\u0924\u093e<\/h2>\n

Every HC-RC81 agricultural gearbox leaves our Hangzhou manufacturing centre after passing a comprehensive end-of-line function test covering gear mesh quality, bearing pre-load, oil seal integrity, and ratio verification. Our CNC gear-hobbing and grinding lines hold module accuracy to DIN 6 or better, while our heat-treatment facility processes all gear blanks in-house under strict temperature-log controls. Beyond standard production, we operate a dedicated custom engineering department capable of modifying the HC-RC81 platform to meet specific UK OEM requirements. This includes adapting output shaft interfaces, altering gear ratios within the bevel geometry envelope, changing housing porting locations for alternative oil-fill configurations, and applying customer-specific surface treatments or paint specifications. Minimum order quantities for custom variants are negotiable, and our engineering team provides full technical liaison from drawing review through to first-article inspection. UK-based machinery distributors and OEM build programmes are welcome to submit their technical packages directly for a no-obligation design-feasibility review.<\/p>\n

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\"Agricultural<\/p>\n

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CNC gear machining line \u2014 agricultural gearbox production<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\u2709 Get a Quote \u2014 Custom & Standard HC-RC81<\/a><\/div>\n<\/div>\n

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\u0917\u094d\u0930\u093e\u0939\u0915 \u0938\u092b\u0932\u0924\u093e \u0915\u0940 \u0915\u0939\u093e\u0928\u093f\u092f\u093e\u0901<\/h2>\n

Real-world results from UK and international machinery operators using our agricultural gearboxes.<\/p>\n

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\ud83c\uddec\ud83c\udde7<\/div>\n
\u092f\u0942\u0915\u0947<\/div>\n
Arable<\/div>\n<\/div>\n
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Lincolnshire Arable Farm \u2014 Rotary Cutter Fleet Overhaul<\/h3>\n

\"Agricultural<\/p>\n

A large-scale grain and oilseed farm in Lincolnshire running a fleet of six tractor-mounted rotary cutters was experiencing annual gearbox replacements on competing product \u2014 attributing failures to insufficient case hardening on the bevel pair. After switching 12 cutter heads to the HC-RC81 agricultural gearbox during a single winter overhaul, the farm reported zero gearbox failures across two full cutting seasons covering approximately 3,200 hectares. The farm’s machinery manager noted that the taper spline interface, in particular, eliminated the shaft-fretting wear that had been occurring on the previous supplier’s parallel-key design.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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\u201c<\/p>\n

We import rotary cutter gearboxes for our UK machinery distribution business and have tried several Chinese suppliers over the years. The HC-RC81 is genuinely a step above in terms of casting quality and gear finish. Our customers in the East Midlands have commented that the units run noticeably quieter than the units we used to stock.<\/p>\n

\u2014 Agricultural Machinery Importer, Nottingham, UK<\/p>\n<\/div>\n

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\u201c<\/p>\n

We source agricultural gearboxes for sugarcane harvester rebuild programmes across Queensland, Australia. The dual gear ratio option on the HC-RC81 gave our technicians the flexibility to optimise blade tip speed for different cane variety densities without having to stock two separate gearbox models. The 28.7 kg weight was also easier to handle during field swaps than our previous 34 kg unit.<\/p>\n

\u2014 Harvester Equipment Rebuilder, Queensland, Australia<\/p>\n<\/div>\n

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\u201c<\/p>\n

As an OEM producing compact flail mulchers for the French and Belgian professional groundskeeping market, we need gearbox suppliers who can commit to consistent dimensional tolerances across production batches. After a 50-unit trial order of the HC-RC81, we found zero rejection rate on input shaft concentricity checks. We have since placed standing annual orders and received excellent lead-time reliability from the team.<\/p>\n

\u2014 Flail Mulcher OEM, Northern France<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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\u0905\u0915\u094d\u0938\u0930 \u092a\u0942\u091b\u0947 \u091c\u093e\u0928\u0947 \u0935\u093e\u0932\u0947 \u092a\u094d\u0930\u0936\u094d\u0928\u094b\u0902<\/h2>\n

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\nWhat is the price of the HC-RC81 agricultural gearbox for UK buyers, and can I get a quote for bulk orders?
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Pricing for the HC-RC81 agricultural gearbox varies depending on order quantity, delivery incoterms, and any customisation requirements. UK importers and machinery distributors are encouraged to contact our sales team at sales@agriculturalgearboxes.top<\/a> with their required quantities and delivery destination. We provide itemised FOB and CIF price sheets within one working day for standard configurations, and will confirm lead times and payment terms at the same time. Volume pricing tiers apply from 10 units upward.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

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\nWhich UK tractor brands and PTO shaft sizes is the HC-RC81 compatible with for rotary cutter applications?
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The HC-RC81 uses a 1 3\/8″ Z6 taper spline interface on both the input and output \u2014 the most widely used PTO and blade hub standard across UK farm machinery. This makes it directly compatible with tractors from John Deere, New Holland, Massey Ferguson, Case IH, Fendt, Claas, and Valtra in the 60\u2013100 HP range running 540 rpm PTO. The gearbox rated input of 600 rpm provides a safe operating margin above the standard 540 rpm PTO speed, protecting the unit during transient load spikes common in dense grass and light scrub cutting.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

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\nHow long does shipping from your factory to a UK agricultural machinery supplier typically take?
\n+<\/span><\/summary>\n
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Standard sea freight from our Hangzhou facility to major UK ports (Felixstowe, Southampton, Tilbury) typically takes 28\u201335 days door-to-port under normal shipping conditions. Air freight options are available for urgent replacement requirements, reducing transit to approximately 5\u20137 business days at a premium. We provide full shipping documentation including packing lists, commercial invoices, and certificates of origin compatible with UK customs clearance procedures, and can recommend UK-based customs brokers from our existing importer network if required.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

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\nWhere can I find a reliable supplier of rotary cutter agricultural gearboxes that ships to the UK with consistent quality control?
\n+<\/span><\/summary>\n
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Sourcing a dependable agricultural gearbox supplier for UK import requires a partner with both manufacturing depth and genuine export logistics capability. Our facility holds ISO 9001 quality certification, and every HC-RC81 agricultural gearbox batch undergoes dimensional inspection against a master gauge set before shipment. UK customers can request a pre-shipment inspection report (including gear tooth contact pattern images and ratio verification data) as standard at no additional cost. We have been exporting to UK agricultural equipment distributors and OEM builders for over a decade, with references available on request.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

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\nWhat type of gear oil should I use in the HC-RC81 agricultural gearbox, and how often should it be changed on a UK farm?
\n+<\/span><\/summary>\n
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We recommend ISO VG 220 gear oil (GL-4 or GL-5 classification) for the HC-RC81 under standard UK operating conditions. Initial oil change should be carried out after the first 50 hours of operation to flush any residual assembly debris, with subsequent intervals at 250 operating hours or annually \u2014 whichever comes first. In very cold UK winter storage conditions, draining the oil and refilling fresh before the spring cutting season is advisable to eliminate any moisture contamination. Oil fill volume is approximately 0.8\u20131.0 litres depending on mounting orientation; check the fill-to-level plug after installation.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

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\nCan I get a custom gear ratio or modified input shaft on the HC-RC81 to suit a non-standard cutter deck design in our UK OEM build programme?
\n+<\/span><\/summary>\n
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Yes \u2014 our custom engineering department regularly supports OEM programmes requiring modified HC-RC81 variants. Modifications we can accommodate include altered gear ratios within the existing housing geometry, alternative shaft end configurations (parallel key, metric spline, square bore), changed housing bolt patterns, and customer-specified surface coating. UK OEM enquiries should be submitted with a brief technical outline of the application, target PTO speed, required output shaft speed range, and annual volume estimate. Our engineering team will confirm feasibility and provide a development timeline and NRE cost estimate, typically within three working days.<\/p>\n<\/div>\n<\/details>\n<\/div>\n<\/div>\n

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Ready to Source the HC-RC81 Agricultural Gearbox?<\/h2>\n

UK enquiries, OEM programmes, and distributor partnerships welcome. Response within one working day.<\/p>\n

\ud83d\udce7 Contact Sales Team<\/a><\/p>\n<\/div>\n

\u091c\u0940\u091c\u0947\u0921\u090f\u0932 \u0926\u094d\u0935\u093e\u0930\u093e \u0938\u0902\u092a\u093e\u0926\u093f\u0924<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

HC-RC81 Agricultural Gearbox | 80HP, Ratio 1:1.93\/1:146, 1 3\/8″ Z6 Taper Spline, 600rpm. Alloy steel helical bevel gears, grey iron housing. UK rotary cutter & flail mulcher drive.<\/p>","protected":false},"featured_media":3992,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[2002],"product_tag":[],"class_list":["post-3989","product","type-product","status-publish","has-post-thumbnail","product_cat-lawn-mower-series-gearbox","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/product\/3989","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/comments?post=3989"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/media\/3992"}],"wp:attachment":[{"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/media?parent=3989"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/product_brand?post=3989"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/product_cat?post=3989"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/agriculturalgearboxes.top\/hi\/wp-json\/wp\/v2\/product_tag?post=3989"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}