{"id":2583,"date":"2026-07-01T06:03:33","date_gmt":"2026-07-01T06:03:33","guid":{"rendered":"https:\/\/hydrauliccylindersprice.com\/product\/mobile-crane-steering-cylinder\/"},"modified":"2026-07-01T06:03:35","modified_gmt":"2026-07-01T06:03:35","slug":"mobile-crane-steering-cylinder","status":"publish","type":"product","link":"https:\/\/hydrauliccylindersprice.com\/cs\/produkt\/mobile-crane-steering-cylinder\/","title":{"rendered":"Mobile Crane Steering Cylinder"},"content":{"rendered":"

<\/p>\n

<\/p>\n

\n \"Multi-axle<\/p>\n
\n Mobile Crane Cylinder \u00b7 7th of 7<\/span><\/p>\n

Mobile Crane Steering Cylinder<\/h2>\n

A 20-metre crane through a city roundabout. A 50-tonne machine into a 15-metre gap on a construction site. The steering cylinder turns each wheel independently \u2014 up to 18 steerable wheels on 9 axles \u2014 giving a vehicle the size of a city bus the manoeuvrability of a delivery van.<\/p>\n

\n
63\u2013200mm<\/span>Bore<\/span><\/div>\n
\u22641,000mm<\/span>Stroke<\/span><\/div>\n
5\u20139<\/span>Axles<\/span><\/div>\n
35 MPa<\/span>Pressure<\/span><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

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Multi-Axle Steering \u2014 Why Every Axle Needs Its Own Cylinder<\/span><\/h2>\n
\n \"Mobile<\/p>\n

A car has one steerable axle and two steering cylinders (integrated into the rack-and-pinion). A large mobile crane has 5\u20139 axles \u2014 and each steerable axle requires its own pair of hydraulic steering cylinders (one per wheel). On a 9-axle all-terrain crane, that is up to 18 individual steering cylinders, each independently controlled by the crane’s electronic steering computer.<\/p>\n<\/div>\n

Each axle must turn to a different angle \u2014 the inner wheels on a turn follow a tighter radius than the outer wheels, and the front axles turn to a larger angle than the rear axles. The steering computer calculates the correct angle for each wheel using Ackermann geometry corrected for the crane’s specific wheelbase, track width, and turning centre. Each steering cylinder must extend to the precise length that produces the computed wheel angle \u2014 typically to within \u00b10.5\u00b0 accuracy.<\/p>\n

Korea Ever-Power manufactures steering cylinders as the final component of the mobile machinery hydraulic cylinder<\/a> range \u2014 completing the 7-cylinder system that powers the mobile crane from foundation to fingertip.<\/p>\n<\/section>\n

<\/p>\n

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Technical Specifications<\/span><\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
Product<\/td>\nMobile Crane Steering Cylinder<\/td>\n<\/tr>\n
Function<\/td>\nSteering system for crane chassis tires<\/td>\n<\/tr>\n
Bore Diameter<\/td>\n63 mm \u2013 200 mm<\/td>\n<\/tr>\n
Rod Diameter<\/td>\n36 mm \u2013 140 mm<\/td>\n<\/tr>\n
Stroke<\/td>\n\u2264 1,000 mm<\/td>\n<\/tr>\n
Working Pressure<\/td>\nMaximum 35 MPa<\/td>\n<\/tr>\n
Application<\/td>\nMobile Crane Chassis (all steerable axles)<\/td>\n<\/tr>\n
Certification<\/td>\nISO 9001 \u00b7 100% hydrostatic tested<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/section>\n

<\/p>\n

\n
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Three Steering Modes \u2014 Same Cylinders, Different Geometry<\/h2>\n

The steering computer reconfigures the same set of steering cylinders into different modes depending on the driving situation:<\/p>\n

\n
\n All-wheel steer \u2014 highway turning<\/strong><\/p>\n

All axles steer in a coordinated pattern \u2014 front axles turn one way, rear axles turn the opposite way. This produces the tightest turning circle for the vehicle length. A 9-axle crane with all-wheel steering can turn in a circle as tight as 23 metres \u2014 comparable to a standard delivery truck despite being 3\u00d7 longer. Each cylinder extends to a different length, computed in real time by the steering controller.<\/p>\n<\/p><\/div>\n

\n Crab steer \u2014 sideways movement<\/strong><\/p>\n

All wheels turn to the same angle \u2014 the crane moves diagonally or sideways without changing its heading. Used to position the crane precisely on site when it cannot rotate (constrained by adjacent structures). The steering cylinders must all extend to identical lengths \u2014 any variation between cylinders causes the crane to drift rather than translate cleanly.<\/p>\n<\/p><\/div>\n

\n Front-axle-only \u2014 high-speed stability<\/strong><\/p>\n

Only the front 1\u20133 axles steer; the rear axles lock straight. Used at highway speeds above 40 km\/h, where rear-axle steering would make the vehicle unstable (the rear would swing outward on turns, causing oversteer). The rear steering cylinders hold the wheels at centre position \u2014 acting as rigid locks. Contact the Korea Ever-Power engineering team<\/a> for multi-axle steering cylinder coordination.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n

Continuous, Precise, and Responsive \u2014 The Driver’s Direct Connection<\/span><\/h2>\n
\n \"Steering<\/p>\n

The steering cylinder is the only crane cylinder that the driver controls directly and continuously through the steering wheel. Every other crane cylinder responds to operator commands through control levers or programmed sequences \u2014 with time to think and correct. The steering cylinder responds in real time, with zero perceptible delay, because the driver’s sense of vehicle direction depends on it.<\/p>\n<\/div>\n

This demands the lowest breakaway friction of any crane cylinder \u2014 the cylinder must start moving at the slightest steering input, without stiction or dead-band. If the steering feels “sticky” or has a lag, the driver over-corrects, and a 50-tonne vehicle oscillates across the lane. Korea Ever-Power specifies PTFE-composite guide rings and low-friction polyurethane seals for steering cylinders \u2014 the same low-breakaway specification used on electric forklift mast cylinders, adapted for the higher pressure and outdoor environment of a crane chassis.<\/p>\n

The steering cylinder also sees the highest cycling frequency of any crane cylinder except the suspension. On a winding mountain road, the driver makes continuous small corrections \u2014 30\u201360 corrections per minute \u2014 each requiring the steering cylinder to extend or retract by 1\u201310 mm. Over a day of road travel, each steering cylinder completes 20,000\u201350,000 micro-cycles.<\/p>\n<\/section>\n

<\/p>\n

\n \"Mobile
\n<\/section>\n

<\/p>\n

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Manufacturing Process<\/span><\/h2>\n

The steering cylinder bore (63\u2013200 mm) is honed to Ra 0.1\u20130.2 \u00b5m \u2014 the fine end of the range, because smooth response at low speed requires minimum seal friction. Chrome plating is 50 \u00b5m (road splash and stone chip protection). Rod eye bushings are high-load spherical bearings rated for the dynamic steering loads \u2014 thrust, side-force, and moment simultaneously. Seals are polyurethane with PTFE guide rings, rated for -30 \u00b0C to +80 \u00b0C and designed for a service life exceeding 10 million micro-cycles.<\/p>\n

Steering cylinders are ordered in matched sets of 4\u201318 per crane (depending on the number of steerable axles). Korea Ever-Power manufactures each set from the same bore batch and tests all cylinders at the same flow rate to verify matched response \u2014 ensuring that when the steering computer commands all cylinders simultaneously (as in crab steer), all wheels reach their target angle at the same time. Every cylinder is hydrostatic tested and response-time tested before shipment.<\/p>\n<\/section>\n

<\/p>\n

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OEM & ODM<\/span><\/h2>\n
\n
\n
What You Provide<\/strong><\/div>\n
\n

Number of steerable axles, axle load per axle, tyre size, steering knuckle geometry (kingpin inclination, scrub radius), required maximum wheel angle, steering modes (all-wheel\/crab\/front-only), system pressure, required response time (ms), quantity per crane, and the steering knuckle\/tie-rod assembly drawing.<\/p>\n<\/div><\/div>\n

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What the Factory Delivers<\/strong><\/div>\n
\n

Matched set of steering cylinders with engineering drawing, bore, rod, stroke, low-friction seal specification, rod eye bushing detail, fine bore finish (Ra 0.1\u20130.2 \u00b5m), and mounting dimensions. Hydrostatic + response-time test certificate. Seal kits. Browse the mobile machinery hydraulic cylinder family<\/a> and the Korea Ever-Power catalogue<\/a>.<\/p>\n<\/div><\/div>\n<\/p><\/div>\n

\"Korea
\n<\/section>\n

<\/p>\n

\n

FAQ<\/span><\/h2>\n
\n
\n

How many steering cylinders does a typical crane use?<\/h3>\n

Two per steerable axle (one per wheel). A 3-axle truck crane with 2 steerable axles uses 4 steering cylinders. A 9-axle all-terrain crane with 8 steerable axles uses 16 steering cylinders. Korea Ever-Power supplies complete matched sets sized for the specific crane model.<\/p>\n<\/p><\/div>\n

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What happens if one steering cylinder fails during travel?<\/h3>\n

The steering computer detects the failure (loss of position feedback or unexpected pressure drop) and switches to a degraded steering mode \u2014 typically locking the affected axle straight and redistributing steering to the remaining axles. The crane can continue to its destination at reduced speed with a wider turning radius. A failed steering cylinder must be replaced before the crane returns to normal operation.<\/p>\n<\/p><\/div>\n

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How does the steering cylinder differ from the other crane cylinders?<\/h3>\n

The steering cylinder is the only crane cylinder that responds to continuous real-time driver input (not programmed sequences). It has the finest bore finish (Ra 0.1\u20130.2 \u00b5m), the lowest breakaway friction, and the fastest response time. It also operates in matched sets of up to 18 \u2014 far more units per crane than any other cylinder type. Browse telescopic cylinders<\/a> and forklift cylinders<\/a> for other steering cylinder applications.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

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Related Categories<\/span><\/h2>\n
\n <\/p>\n
\n
\"Telescopic\"<\/div>\n
\n
Telescopic Hydraulic Cylinders \u2192<\/div>\n
Dump truck, trailer, hoist.<\/div>\n<\/div>\n<\/div>\n

<\/a>
\n <\/p>\n

\n
\"Forklift\"<\/div>\n
\n
Forklift Hydraulic Cylinders \u2192<\/div>\n
Lift, tilt, steer \u2014 OEM.<\/div>\n<\/div>\n<\/div>\n

<\/a>
\n <\/p>\n

\n
\"AWV\"<\/div>\n
\n
Aerial Work Vehicle Cylinders \u2192<\/div>\n
Scissor, boom, platforms.<\/div>\n<\/div>\n<\/div>\n

<\/a>\n <\/div>\n<\/section>\n

<\/p>\n

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

Mobile crane steering cylinder \u2014 the hydraulic actuator that turns the wheels on each steerable axle of a multi-axle crane chassis. A large all-terrain crane has 5\u20139 axles with up to 18 steerable wheels \u2014 each wheel angle controlled by its own steering cylinder. Multiple steering modes (all-wheel steer, crab steer, front-axle-only) enable a 20-metre-long vehicle to navigate tight construction sites and public roundabouts. Bore 63\u2013200 mm, stroke \u22641,000 mm, 35 MPa. Korea Ever-Power. ISO 9001. OEM & ODM.<\/div>","protected":false},"featured_media":2584,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[854],"product_tag":[],"class_list":["post-2583","product","type-product","status-publish","has-post-thumbnail","product_cat-mobile-machinery-hydraulic-cylinders","pa_editor-cxm","first","instock","product-type-simple"],"_links":{"self":[{"href":"https:\/\/hydrauliccylindersprice.com\/cs\/wp-json\/wp\/v2\/product\/2583","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hydrauliccylindersprice.com\/cs\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hydrauliccylindersprice.com\/cs\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/cs\/wp-json\/wp\/v2\/comments?post=2583"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/cs\/wp-json\/wp\/v2\/media\/2584"}],"wp:attachment":[{"href":"https:\/\/hydrauliccylindersprice.com\/cs\/wp-json\/wp\/v2\/media?parent=2583"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/cs\/wp-json\/wp\/v2\/product_brand?post=2583"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/cs\/wp-json\/wp\/v2\/product_cat?post=2583"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/cs\/wp-json\/wp\/v2\/product_tag?post=2583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}