{"id":323,"date":"2026-07-24T04:01:03","date_gmt":"2026-07-24T04:01:03","guid":{"rendered":"https:\/\/superiortransmissioninc.com\/?post_type=product&p=323"},"modified":"2026-07-24T05:43:49","modified_gmt":"2026-07-24T05:43:49","slug":"ep-29kg-60hp-540-rpm-heavy-duty-lawn-mower-gearbox","status":"publish","type":"product","link":"https:\/\/superiortransmissioninc.com\/nn\/product\/ep-29kg-60hp-540-rpm-heavy-duty-lawn-mower-gearbox\/","title":{"rendered":"EP-29Kg 60HP 540 RPM Heavy Duty Lawn Mower Gearbox"},"content":{"rendered":"
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Heavy-Duty Agricultural Transmission<\/p>\n

EP-29Kg 60HP 540 RPM
\nHeavy Duty Lawn Mower Gearbox<\/h2>\n

A robust 60 HP right angle drive unit engineered for large-scale rotary mowing, professional turf management, and high-output PTO-driven deck applications across global agricultural and municipal markets.<\/p>\n

\u00a0Agricultural Gearbox <\/a><\/p>\n<\/div>\n<\/div>\n

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Technical Specifications \u2014 EP-29Kg Lawn Mower Gearbox<\/h2>\n
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Parameter<\/th>\nLawn Mower Gearbox Specification<\/th>\n<\/tr>\n<\/thead>\n
Model<\/td>\nEP-29Kg Heavy Duty Lawn Mower Gearbox (HC-966109)<\/td>\n<\/tr>\n
Power (HP)<\/td>\n60 HP<\/td>\n<\/tr>\n
Rated Input Speed<\/td>\n540 RPM<\/td>\n<\/tr>\n
Gear Ratio Options<\/td>\n1:1.46 \/ 1:1.93<\/td>\n<\/tr>\n
Teeth Configuration<\/td>\n13\/19 (ratio 1:1.46) \u00b7 14\/27 (ratio 1:1.93)<\/td>\n<\/tr>\n
Module<\/td>\n7.0 \/ 5.5<\/td>\n<\/tr>\n
Input Shaft Interface<\/td>\n1 3\/8 Z6 spline \/ 1 3\/4 Z20 spline<\/td>\n<\/tr>\n
Output Interface<\/td>\nOptic axis STaper spline<\/td>\n<\/tr>\n
Net Weight<\/td>\n29 kg<\/td>\n<\/tr>\n
Overall Dimensions (mm)<\/td>\n108 (W) \u00d7 207.5 (L) \u00d7 182.5 (H) \u2014 base 138 \u00d7 95 mm \u00b7 output shaft \u23008.3 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

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5 Key Performance Advantages<\/h2>\n
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\u25ba 60 HP Heavy-Duty Rated Power<\/div>\n

Unlike standard 30 HP lawn mower gearbox models, the EP-29Kg Lawn Mower Gearbox is rated for continuous 60 HP duty \u2014 making it suitable for extra-wide cutting decks, dense biomass cutting operations, and high-cycle verge maintenance contracts where gearbox overload is a common failure mode on lighter units.<\/p>\n<\/div>\n

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\u25ba Large-Module Bevel Gears (7.0 \/ 5.5)<\/div>\n

Modules of 7.0 and 5.5 \u2014 substantially larger than those found on 30 HP agricultural lawnmower gearbox units \u2014 deliver a wider contact face on each tooth, distributing impact loads across more material and dramatically extending gear life under high shock-load conditions typical of thick pasture and roadside verge cutting.<\/p>\n<\/div>\n

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\u25ba Dual Input Shaft Compatibility<\/div>\n

A 1 3\/8 Z6 spline accommodates smaller tractor PTO stubs on compact and mid-range machines, while the 1 3\/4 Z20 option connects directly to the large-bore PTO outputs found on 80\u2013120 HP tractors used across European, North American, and Australian commercial mowing operations \u2014 no adapter sleeves required in either configuration.<\/p>\n<\/div>\n

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\u25ba STaper Spline Output for OEM Integration<\/div>\n

The optic axis STaper spline output is an internationally recognised deck spindle interface, meaning this heavy duty gearbox can serve as a direct-fit agricultural lawn mower gearbox replacement<\/strong> on many OEM decks from leading European and North American machinery platforms without machined adaptors.<\/p>\n<\/div>\n

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\u25ba Reinforced Housing for Field Durability<\/div>\n

At 29 kg net weight, the EP-29Kg Lawn Mower Gearbox housing is built with substantially thicker wall sections than lightweight gearboxes, resisting cracking and distortion when the mower deck strikes embedded rocks, root systems, or terrain undulations at full cutting speed \u2014 a critical attribute for ride on lawn mower gearbox applications in stony or uneven terrain.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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How the EP-29Kg Lawn Mower Gearbox Works<\/h2>\n

Input torque from the tractor PTO shaft enters the EP-29Kg lawn mower gearbox horizontally through the selected 1 3\/8 Z6 or 1 3\/4 Z20 splined interface. The input pinion \u2014 cut from alloy steel and hardened to precise case depth \u2014 meshes at 90 degrees with the output ring gear, redirecting the drive from the horizontal tractor shaft plane to the vertical blade spindle plane. This is the defining function of a right angle gearbox for lawn mower use: it maintains the tractor engine in its natural fore-aft orientation while driving a horizontal cutting deck positioned below and behind the machine.<\/p>\n

At ratio 1:1.46 and a 540 rpm PTO input, the output spindle turns at approximately 788 rpm \u2014 appropriate for large heavy-duty decks where blade tip speed must be controlled to avoid structural loading. Selecting ratio 1:1.93 raises output to approximately 1,042 rpm, better suited to finer grass cutting or lighter-load mowing in municipal turf environments. The gear module of 7.0 (for the 13\/19 tooth set) ensures that tooth root bending stress and contact stress remain comfortably within AGMA allowable limits at the full 60 HP input rating.<\/p>\n

Lubrication is provided by a splash oil bath within the sealed ductile iron housing. The large sump volume at this gearbox scale means oil temperature rise per unit of heat generated is lower than in compact 30 HP units, contributing to extended oil change intervals and improved bearing seal longevity in sustained field operation. The STaper output spline transmits the full output torque to the blade spindle without keyway-induced stress concentrations, maintaining a balanced torque path under the shock loads inherent in any gearbox lawn mower<\/strong> application.<\/p>\n<\/div>\n

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Materials and Build Quality of Lawn Mower Gearbox<\/h2>\n

The EP-29Kg Lawn Mower Gearbox housing is pressure-cast from ductile iron (nodular cast iron) to GGG50 or equivalent specification, offering a tensile strength in excess of 500 MPa alongside the damping properties that reduce vibration transmission to the mower deck frame. Ductile iron is the standard of the industry for high-power lawn mower gearbox housings because it combines the castability of grey iron with impact resistance that plain grey cast iron cannot match \u2014 especially important at 60 HP where transient torque peaks from blade strikes can be two to three times the rated load.<\/p>\n

The bevel gear set is machined from 20CrMnTi or equivalent carburising alloy steel. Teeth are cut on modern gear-hobbing centres, then case-hardened to 58\u201362 HRC at the flanks and tooth tips, leaving a tough, medium-hardness core at approximately 30\u201335 HRC. This case-hardened profile is ground to AGMA Quality 10 or better for precise tooth geometry, quiet mesh, and even load distribution at elevated torque levels. Every set undergoes blue-contact pattern inspection before assembly to verify theoretical contact ratio is achieved across the full tooth face width.<\/p>\n

All shaft journals are ground to h6 tolerance to match the bearing inner races, which are dimensioned to L10 design lives above 6,000 operating hours at rated load and speed \u2014 a specification that makes this lawn mower gearbox suitable for multi-season commercial contracts without scheduled overhaul. Lip seals on both input and output shafts are nitrile rubber (NBR) compounds resistant to EP gear oil at temperatures up to 100 \u00b0C \u2014 covering the range typically encountered during full-season use in tropical and subtropical agricultural regions, including Southeast Asian sugarcane production zones and Brazilian cerrado beef and grain farms where PTO-driven mowing is performed year-round.<\/p>\n<\/div>\n

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Application Scenarios of Lawn Mower Gearbox<\/h2>\n
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\ud83c\udf3f Wide-Deck Rotary Mowing on Large Farms<\/h3>\n

High-acreage cattle and sheep stations in Australia and grain farms across the US Great Plains run wide-cut rotary mower decks exceeding 3.5 metres, requiring a heavy duty lawn mower gearbox<\/strong> capable of sustaining 60 HP input without thermal overload. The EP-29Kg Lawn Mower Gearbox handles multi-hour cutting runs in thick paddock grass and reed-bed conditions where lighter gearboxes overheat and fail prematurely.<\/p>\n<\/div>\n

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\ud83c\udf3f Municipal Road and Motorway Verge Cutting<\/h3>\n

Highway maintenance authorities across Germany, France, the UK, and Canada deploy heavy-duty rotary mowers on booms and three-point linkages for seasonal verge programmes. The EP-29Kg mower deck gearbox handles abrupt angle transitions when the boom crosses drainage channels or steep embankments, and its robust housing withstands the repeated stone-strike shocks that are unavoidable in roadside mowing environments.<\/p>\n<\/div>\n

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\ud83c\udf3f Golf Course and Sports Venue Rough Management<\/h3>\n

Golf courses in the US, Japan, South Korea, and the UAE require large-scale rough mowing at controlled heights without visible striping variation. A reliable agricultural lawnmower gearbox<\/strong> operating at consistent output speed ensures uniform cutting height across rough and semi-rough zones. The 1:1.46 ratio option at 540 rpm PTO gives blade tip speeds appropriate for Kentucky bluegrass and Bermudagrass rough areas without excessive clipping throw.<\/p>\n<\/div>\n

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\ud83c\udf3f Plantation Undergrowth and Cover Crop Management<\/h3>\n

Palm oil, rubber, and timber plantations in Malaysia, Indonesia, and West Africa require regular inter-row undergrowth management to control competition for nutrients and to maintain trafficability for harvest equipment. A 60 HP lawnmower drive gearbox driving a heavy flail or rotary deck handles the mixed-species vegetation \u2014 including woody regrowth and bamboo shoots \u2014 that accumulates between harvest cycles in these tropical plantation environments.<\/p>\n<\/div>\n

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\ud83c\udf3f OEM Heavy-Duty Mower Deck Manufacturing<\/h3>\n

Equipment builders integrating new commercial mowing platforms with deck widths from 1.8 m to 3.6 m choose the EP-29Kg as their primary gearbox for lawn mower<\/strong> decks at the 60 HP tier. The standardised mounting flange and dual input spline options reduce engineering overhead across multiple platform widths. Its availability as a direct-fit agricultural lawn mower gearbox replacement<\/strong> also simplifies the aftermarket service story for dealers in regions where parts availability drives purchasing decisions.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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International Regulatory Framework for Agricultural Gearboxes<\/h2>\n

PTO-driven mowing equipment and its drive components are governed by machinery safety regulations in all major agricultural markets. Buyers and integrators must be aware of the applicable standards in their region.<\/p>\n

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Region<\/th>\nApplicable Standard<\/th>\nKey Requirement<\/th>\n<\/tr>\n<\/thead>\n
EU Member States<\/td>\nMachinery Directive 2006\/42\/EC \u00b7 EN ISO 4254-7<\/td>\nCE marking mandatory for PTO-driven mowing equipment; rotating shaft guarding required within 300 mm of operator position<\/td>\n<\/tr>\n
United Kingdom<\/td>\nUK Machinery (Safety) Regulations 2008 \u00b7 PUWER 1998<\/td>\nUKCA mark required post-Brexit; PUWER mandates guarding of PTO drive shafts and gearbox inputs on all agricultural work equipment<\/td>\n<\/tr>\n
United States<\/td>\nANSI\/ASABE S395.2 \u00b7 OSHA 29 CFR 1928.57<\/td>\nASABE safety standards govern PTO-driven equipment design; OSHA agricultural regulations require intact PTO shaft shields during all field operations<\/td>\n<\/tr>\n
Australia<\/td>\nSafe Work Australia \u2014 Model WHS Regulations<\/td>\nState-based WHS legislation mandates risk assessment for PTO-powered mowing machinery; guarding of rotating gearbox components is a legal obligation for commercial operators<\/td>\n<\/tr>\n
Brazil<\/td>\nNR 12 \u00b7 ABNT NBR 14978<\/td>\nNR 12 safety standard covers all agricultural machinery; rotating transmission components must be guarded and labelled; equipment must carry the INMETRO conformity mark where applicable<\/td>\n<\/tr>\n
Canada<\/td>\nCSA Z1000 \u00b7 Ontario O. Reg. 414\/05<\/td>\nProvincial occupational health and safety regulations govern PTO machinery on Canadian farms; Ontario regulation specifically addresses tractor PTO shaft guarding requirements for all commercial mowing operations<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

All buyers should independently verify current regional requirements. Our technical team can provide material certificates, dimensional drawings, and documentation packages to support CE, UKCA, or other certification submissions on request.<\/p>\n<\/div>\n

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Compatible Products \u2014 One-Source Drive System<\/h2>\n

The EP-29Kg becomes even more effective when paired with a matched mowing unit and correctly rated driveline shaft. Sourcing the lawn mower gearbox, deck, and drive shaft together eliminates compatibility risk and ensures every component is rated to the same power level \u2014 a significant operational advantage for commercial operators managing large fleets.<\/p>\n

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Rotary Lawn Mower Units<\/h3>\n

Pairing the EP-29Kg with a complete lawn mower<\/a> deck rated to 60 HP input removes the guesswork from component matching. Our mower deck range is built to accept the EP-29Kg mounting flange and STaper spline output directly, giving buyers a validated drive assembly that has been load-tested as a matched pair rather than a collection of individually specified parts. This one-source system approach also simplifies warranty and after-sale support across global distributor networks.<\/p>\n

\"Rotary<\/div>\n<\/div>\n
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PTO Drive Shafts<\/h3>\n

A 60 HP gearbox demands a driveline shaft rated for the same torque load \u2014 using an undersized PTO shaft<\/a> is the single most common cause of premature gearbox input shaft bearing failure in heavy-duty mowing operations. Our shafts for the EP-29Kg application are specified with friction overload clutches appropriate for markets where EU\/UK\/Australian regulations require slip-clutch protection on PTO-driven equipment. Wide-angle joint options are available for boom-mounted applications where the PTO shaft operates at angles up to 30 degrees from horizontal.<\/p>\n

\"60HP<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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About the Manufacturer<\/h2>\n

Backed by over a decade of practical mechanical engineering expertise, our manufacturing operation delivers a comprehensive range of power transmission and agricultural machinery components \u2014 spanning agricultural gearboxes, worm gear reducers, planetary gear drives, PTO shafts, hydraulic cylinders, precision gears, roller chains, and industrial motors. Every product line is managed under an ISO 9001:2015 quality management framework, with in-process inspection at every machining stage.<\/p>\n

Beyond the standard catalogue, the facility engineers and fabricates custom gearbox assemblies to customer specification in ductile iron, cast iron, cast steel, precision investment cast steel, and cast aluminium alloys. Associated mechanical components \u2014 gear wheels, chain sprockets, worm gear pairs, timing pulleys, worm shafts, and both standard and non-standard precision parts \u2014 are produced in the same manufacturing environment, giving buyers a single accountable supplier from initial design through to field-ready product delivery.<\/p>\n<\/div>\n

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WorkShop<\/h3>\n
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\"Factory
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\n\"Welding<\/div>\n<\/div>\n<\/div>\n

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Frequently Asked Questions<\/h2>\n
\nQ1. What tractor horsepower do I need to run a 60HP heavy duty lawn mower gearbox effectively on a large commercial mowing operation in Australia?<\/summary>\n
For the EP-29Kg rated at 60 HP continuous duty at 540 rpm, you need a tractor producing at least 70 HP at the PTO to maintain rated gearbox output while the tractor drives itself over terrain. In Australian commercial mowing contexts \u2014 including road reserves, mine site revegetation areas, and large pastoral stations \u2014 tractors in the 80\u2013120 HP range are the standard platform. This ensures the gearbox operates below its peak load rating even when cutting dense kikuyu or Rhodes grass in peak growing season, giving you meaningful reserve capacity and preventing premature bearing wear.<\/div>\n<\/details>\n
\nQ2. How do I identify which agricultural lawn mower gearbox replacement fits my existing rotary mower deck when the original nameplate has worn off in the UK?<\/summary>\n
Measure four things: (1) the flange bolt-hole pattern and bolt circle diameter, (2) the input shaft bore diameter and spline count, (3) the output interface \u2014 whether it is a plain bore, keyway, or taper spline \u2014 and (4) the approximate gear ratio by slowly rotating the input while counting output turns. The EP-29Kg uses a flange pattern of 108 \u00d7 207.5 mm housing width\/length, accepts 1 3\/8 Z6 or 1 3\/4 Z20 input splines, and produces an STaper output. Matching these four parameters against our specification sheet is sufficient to verify fit in the majority of UK and Irish rotary mower replacement scenarios. Our technical team can also review photos and video of the worn unit to assist with identification.<\/div>\n<\/details>\n
\nQ3. Which gear oil specification should I use in a heavy duty right angle gearbox for lawn mower applications operating year-round in high-temperature tropical regions like Southeast Asia?<\/summary>\n
In tropical operating environments where ambient temperatures range from 30\u201340 \u00b0C and the gearbox sees continuous duty in plantation undergrowth clearing, we recommend an API GL-5 rated EP gear oil in the SAE 90 viscosity grade. The heavier base oil resists viscosity thinning at high sump temperatures and maintains an adequate lubricant film across the module 7.0 bevel gear contact zone. For operations in Malaysia, Indonesia, or the Philippines where humidity is also a factor, inspect the oil colour at every 100-hour interval during the first season \u2014 an off-white emulsified appearance indicates water ingress through a degraded input shaft seal, which should be remedied immediately to avoid corrosive pitting of the gear tooth flanks.<\/div>\n<\/details>\n
\nQ4. When should a ride on lawn mower gearbox be overhauled versus fully replaced on a commercial turf maintenance fleet in North America?<\/summary>\n
Overhaul is economically justified when the gear tooth flanks still show acceptable surface condition \u2014 no spalling, pitting, or plastic deformation \u2014 but bearings and seals have reached their service limit (typically 4,000\u20136,000 hours for the EP-29Kg). At overhaul, replace all bearing sets, input and output lip seals, and the oil. Full replacement is the better choice when gear tooth wear exceeds 15% of original tooth thickness, when the housing shows crack lines at the bearing boss areas, or when the operating cost of further overhauls approaches the cost of a new unit. For commercial North American fleets operating two cutting seasons per year, a typical overhaul cycle falls around year 3\u20134 of continuous use.<\/div>\n<\/details>\n
\nQ5. Where can I source lawnmower gearbox parts and a service kit for the EP-29Kg if I am operating on a remote farm in Canada during the mowing season?<\/summary>\n
Core wearing parts for the EP-29Kg \u2014 input and output shaft lip seals, taper roller bearing sets for both shafts, and gear oil \u2014 are available through agricultural machinery parts distributors in most Canadian provincial centres and through online agricultural supply platforms that serve remote operators. For gear sets and housing components specific to the EP-29Kg, contact us directly with the model designation and ratio marking stamped on the housing. We maintain a spare parts inventory and can airfreight critical components to Canadian distribution hubs within standard lead times. Stocking a basic seal-and-bearing service kit on-farm before the mowing season begins is the most effective way to avoid extended downtime at peak operational periods.<\/div>\n<\/details>\n
\nQ6. How does a 90 degree gearbox differ from a parallel-shaft drive in a self-propelled lawn mower gearbox setup for professional stadium pitch maintenance in Europe?<\/summary>\n
A 90-degree gearbox \u2014 like the EP-29Kg Lawn Mower Gearbox \u2014 redirects the input shaft rotation through a right angle using spiral bevel gears, which allows the mower deck blades to rotate on a vertical axis while the tractor PTO shaft remains horizontal. Parallel-shaft drives cannot achieve this geometry without additional jackshafts, adding complexity, weight, and potential failure points. In European stadium pitch maintenance \u2014 where the tractor must manoeuvre in tight headland turns, and the mower deck needs to sit at a precise cutting height below a defined height limit \u2014 the compact vertical profile of a 90-degree gearbox assembly is a meaningful operational advantage. The self propelled lawn mower gearbox versions of this layout also allow deck height adjustment without disturbing the drive shaft geometry.<\/div>\n<\/details>\n<\/div>\n<\/div>\n

Editor: PXY<\/p>","protected":false},"excerpt":{"rendered":"

The EP-29Kg lawn mower gearbox is a heavy-duty 60 HP right angle transmission unit purpose-built for professional and commercial rotary mowing operations where output torque demands exceed the capacity of lighter 30 HP assemblies. Running at a rated input speed of 540 rpm from a standard tractor PTO, this gearbox delivers measured, consistent blade-drive power through a large-module bevel gear set that handles shock loads and continuous high-duty-cycle cutting with minimal thermal buildup. Two ratio options \u2014 1:1.46 and 1:1.93 \u2014 allow OEM integrators and replacement buyers to precisely match rotational output to deck diameter and target blade tip speed for specific crop or turf conditions encountered in North American pasture management, European municipal verge maintenance, and large-estate grounds care in Australia and the Middle East.<\/p>\n

Weighing in at a net 29 kg, this unit is the heaviest and most structurally capable lawn mower gearbox in the EP series, reflecting the robust cast housing, large-bore input shaft (1 3\/8 Z6 or 1 3\/4 Z20 spline options), and oversized bearing races needed to sustain 60 HP at sustained duty.<\/p>","protected":false},"featured_media":324,"template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[20],"product_tag":[],"class_list":["post-323","product","type-product","status-publish","has-post-thumbnail","product_cat-lawn-mower-gearbox","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/superiortransmissioninc.com\/nn\/wp-json\/wp\/v2\/product\/323","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/superiortransmissioninc.com\/nn\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/superiortransmissioninc.com\/nn\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/nn\/wp-json\/wp\/v2\/media\/324"}],"wp:attachment":[{"href":"https:\/\/superiortransmissioninc.com\/nn\/wp-json\/wp\/v2\/media?parent=323"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/nn\/wp-json\/wp\/v2\/product_brand?post=323"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/nn\/wp-json\/wp\/v2\/product_cat?post=323"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/nn\/wp-json\/wp\/v2\/product_tag?post=323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}