{"id":2549,"date":"2026-07-01T06:03:16","date_gmt":"2026-07-01T06:03:16","guid":{"rendered":"https:\/\/hydrauliccylindersprice.com\/product\/large-excavator-bucket-cylinder\/"},"modified":"2026-07-01T06:03:20","modified_gmt":"2026-07-01T06:03:20","slug":"large-excavator-bucket-cylinder","status":"publish","type":"product","link":"https:\/\/hydrauliccylindersprice.com\/th\/product\/large-excavator-bucket-cylinder\/","title":{"rendered":"Large Excavator Bucket Cylinder"},"content":{"rendered":"

<\/p>\n
\n \"Large<\/p>\n
\n Large Excavator \u00b7 1st of 4<\/span><\/p>\n

Large Excavator Bucket Cylinder<\/h2>\n

14\u00d7 the force. 2.5\u00d7 the stroke. 3.4\u00d7 the bore. Everything about the large excavator bucket cylinder is a scale-up from the small \u2014 except the engineering approach, which is fundamentally different. At this scale, the bucket holds 4\u20137 m\u00b3 of rock, and each curl stroke generates forces that would tear a small excavator cylinder apart.<\/p>\n

\n
200\u2013360mm<\/span>Bore<\/span><\/div>\n
3,561 KN<\/span>Max Thrust<\/span><\/div>\n
35 MPa<\/span>Pressure<\/span><\/div>\n
\u22642,500mm<\/span>Stroke<\/span><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n
\n

The Scale Jump \u2014 From Mini Excavator to Mining Machine<\/span><\/h2>\n
\n \"Large<\/p>\n

The small excavator bucket cylinder (#1) has a maximum bore of 105 mm and produces 255 KN of curl force \u2014 enough to dig residential foundations and utility trenches. The large excavator bucket cylinder starts where the small one ends and scales up to a different world: mining faces, quarry blasts, highway cuts, and dam foundations where the excavator loads 30\u201350 tonne dump trucks with 4\u20137 cubic metres per bucket.<\/p>\n<\/div>\n

\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nSmall (#1)<\/th>\nLarge (#6)<\/th>\nScale Factor<\/th>\n<\/tr>\n<\/thead>\n
Max Bore<\/td>\n105 mm<\/td>\n360 mm<\/td>\n3.4\u00d7<\/td>\n<\/tr>\n
Max Stroke<\/td>\n1,000 mm<\/td>\n2,500 mm<\/td>\n2.5\u00d7<\/td>\n<\/tr>\n
Thrust<\/td>\n255 KN<\/td>\n3,561 KN<\/td>\n14\u00d7<\/td>\n<\/tr>\n
Pressure<\/td>\n29.4 MPa<\/td>\n35 MPa<\/td>\n1.2\u00d7<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n

The thrust increase (14\u00d7) far outpaces the bore increase (3.4\u00d7) because force scales with the square of the bore diameter \u2014 and the pressure also increases from 29.4 to 35 MPa. Korea Ever-Power manufactures the large excavator bucket cylinder as the first of four large excavator hydraulic cylinders<\/a>.<\/p>\n<\/section>\n

\n

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>\nLarge Excavator Bucket Cylinder<\/td>\n<\/tr>\n
Function<\/td>\nControl the action of the bucket (curl \/ dump)<\/td>\n<\/tr>\n
Bore Diameter<\/td>\n200 mm \u2013 360 mm<\/td>\n<\/tr>\n
Rod Diameter<\/td>\n140 mm \u2013 260 mm<\/td>\n<\/tr>\n
Stroke<\/td>\n\u2264 2,500 mm<\/td>\n<\/tr>\n
Max Thrust<\/td>\n3,560.8 KN (bore 420 mm \/ 35 MPa at largest configuration)<\/td>\n<\/tr>\n
Application<\/td>\nLarge Excavator (20\u2013100+ tonne class)<\/td>\n<\/tr>\n
Certification<\/td>\nISO 9001 \u00b7 100% hydrostatic tested<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/section>\n
\n
\n

Mining and Quarrying \u2014 Where Rock Replaces Soil and Force Replaces Finesse<\/h2>\n

The small excavator digs soil, clay, and gravel \u2014 materials that yield to moderate force. The large excavator digs blasted rock, frozen ground, cemented aggregate, and heavy clay with embedded boulders \u2014 materials that resist with peak forces 5\u201310\u00d7 higher than soil. The 35 MPa system pressure and 360 mm bore provide the brute force to penetrate these materials.<\/p>\n

\n
\n Blasted rock \u2014 irregular, interlocking fragments<\/strong><\/p>\n

After quarry blasting, the rock pile consists of jagged fragments interlocking like a 3D puzzle. The bucket must break these interlocks \u2014 the curl force must overcome not just the fragment weight but the shear strength of the interlocking surfaces. Peak pressure spikes during bucket penetration into a blast pile can reach 90\u2013100% of system pressure for 0.5\u20132 seconds per curl stroke.<\/p>\n<\/p><\/div>\n

\n Frozen ground \u2014 seasonal challenge at northern mines<\/strong><\/p>\n

In Arctic and subarctic mining regions, the top 0.5\u20133.0 metres of ground freezes solid in winter \u2014 with compressive strength approaching that of concrete. The bucket cylinder must curl through this frozen layer before reaching the unfrozen ore below. The cylinder seals must maintain 35 MPa performance at -40 \u00b0C ambient temperature \u2014 requiring FKM or special low-temperature NBR compounds. Contact Korea Ever-Power<\/a> for cold-climate large excavator specifications.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n

\n \"Large
\n<\/section>\n
\n

Manufacturing Process<\/span><\/h2>\n
\n \"Korea<\/p>\n

The bore (200\u2013360 mm) is deep-hole bored and honed to Ra 0.2\u20130.4 \u00b5m. At these diameters, seamless tube may not be available \u2014 Korea Ever-Power uses precision deep-hole drilling from solid bar or welded tube with full-penetration welds, followed by stress-relief heat treatment and ultrasonic inspection. Chrome plating is 80 \u00b5m (mining\/quarry standard). Rod straightness \u22640.1 mm\/metre across the 2,500 mm stroke.<\/p>\n<\/div>\n

The rod eye is forged from a single billet \u2014 not welded \u2014 because the bucket cylinder’s impact loading at the rod end (direct rock strikes through the bucket linkage) demands a joint free of weld-heat-affected zones. Seals are polyurethane + NBR or FKM (for cold-climate versions), rated for 35 MPa. Heavy-duty quad-lip wipers for rock-dust contamination.<\/p>\n

Every large excavator bucket cylinder is hydrostatic tested at 1.5\u00d7 rated pressure (52.5 MPa) and full-stroke tested under simulated digging loads.<\/p>\n<\/section>\n

\n

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

Excavator model and weight class, bucket size and weight, digging material (rock\/soil\/frozen ground), required breakout force, bore\/rod\/stroke, system pressure, temperature range, pin diameters, and the bucket linkage assembly drawing.<\/p>\n<\/div>\n<\/div>\n

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

Engineering drawing with bore, rod (forged eye), stroke, deep-hole bored barrel, 80 \u00b5m chrome, quad-lip wiper, cold-climate seal option, and mounting dimensions. Hydrostatic + full-stroke test. Seal kits. Browse the mobile machinery hydraulic cylinder family<\/a> and the Korea Ever-Power catalogue<\/a>.<\/p>\n<\/div>\n<\/div><\/div>\n

\"Workshop\"
\n<\/section>\n

\n

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

Why does the large excavator need 35 MPa instead of 29.4 MPa?<\/h3>\n

The materials are harder. Blasted rock, frozen ground, and cemented aggregate require breakout forces that the lower 29.4 MPa pressure cannot achieve at practical bore sizes. Increasing the system pressure from 29.4 to 35 MPa adds 19% more force from the same bore \u2014 enough to penetrate these harder materials without requiring an even larger (heavier, bulkier) cylinder.<\/p>\n<\/div>\n

\n

How does the 2,500 mm stroke compare to the small excavator’s 1,000 mm?<\/h3>\n

The longer stroke accommodates the larger bucket arc \u2014 a 7 m\u00b3 bucket on a 20-metre stick sweeps through a much larger angular range than a 0.3 m\u00b3 bucket on a 3-metre stick. The 2,500 mm stroke allows the bucket to curl through its full 160\u2013180\u00b0 rotation arc, ensuring complete filling in hard materials that require aggressive curl angles.<\/p>\n<\/div>\n

\n

Can Korea Ever-Power supply the complete large excavator cylinder set?<\/h3>\n

Yes \u2014 bucket (#6), boom (#7), stick (#8), and tightening (#9) cylinders are available as a matched set for large excavator OEMs. All four share the 35 MPa pressure rating and are manufactured with forged rod eyes, 80 \u00b5m chrome, and mining-grade contamination protection. Browse telescopic cylinders<\/a> and industrial engineering cylinders<\/a>.<\/p>\n<\/div><\/div>\n<\/section>\n

\n

Related Categories<\/span><\/h2>\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><\/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><\/p>\n

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

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

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

Large excavator bucket cylinder \u2014 the hydraulic actuator controlling the bucket curl and dump action on 20\u2013100+ tonne excavators used in mining, quarrying, mass earthmoving, and heavy demolition. A step-change in scale from the small excavator: bore 200\u2013360 mm (vs 50\u2013105 mm), stroke up to 2,500 mm (vs 1,000 mm), and thrust 3,560.8 KN (vs 255 KN) \u2014 14 times the force. The bucket on a 100-tonne excavator holds 4\u20137 cubic metres and weighs 3\u20136 tonnes empty. The bucket cylinder curls this mass through hard rock, frozen ground, and blast material at pressures up to 35 MPa. Korea Ever-Power. ISO 9001. OEM & ODM.<\/div>","protected":false},"featured_media":2550,"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-2549","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\/th\/wp-json\/wp\/v2\/product\/2549","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hydrauliccylindersprice.com\/th\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hydrauliccylindersprice.com\/th\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/th\/wp-json\/wp\/v2\/comments?post=2549"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/th\/wp-json\/wp\/v2\/media\/2550"}],"wp:attachment":[{"href":"https:\/\/hydrauliccylindersprice.com\/th\/wp-json\/wp\/v2\/media?parent=2549"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/th\/wp-json\/wp\/v2\/product_brand?post=2549"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/th\/wp-json\/wp\/v2\/product_cat?post=2549"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/th\/wp-json\/wp\/v2\/product_tag?post=2549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}