At 15 m\/min on a 250 mm PCD drum: required drum speed = 15 \/ (3.14 x 0.25) = 19.1 rpm. Motor speed = 19.1 x 6.2 = 118.4 rpm. If the available pump flow is 30 L\/min: motor displacement = 30,000 \/ 118.4 = 253 cc\/rev. This is a standard low-speed, high-torque orbit motor size (for example, Eaton Char-Lynn 2000 series, Danfoss OMP\/OMR 250). For higher hoisting speeds, increase the pump flow or reduce the motor displacement \u2014 the 401W1 input speed limit of 1,000 rpm is rarely the constraining factor in single-stage winch applications.<\/p>\n<\/div>\n
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How does the winch drive planetary gearbox handle shock loading from a sudden load pickup?<\/h3>\n
A sudden load pickup (for example, lifting a load off the ground with slack cable) generates a torque spike at the drum that can reach 2-3 times the steady-state lifting torque. The 401W1 is rated at 1,300 Nm continuous, with a peak capacity of approximately 2,600 Nm for transient events. This covers normal pickup shocks. However, snatch loading (deliberately jerking a stuck load free) can produce torques exceeding 5x steady-state \u2014 this is outside the gearbox design envelope and risks permanent gear damage. Use a load-limiting valve in the hydraulic circuit to prevent snatch-load torques from reaching the gearbox.<\/p>\n<\/div>\n<\/div>\n<\/section>\n
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Peter D. \u2014 Lifting Equipment Inspector (LOLER)<\/div>\n
Verified Purchase \u00b7 Aberdeen, UK \u00b7 March 2026<\/div>\n<\/div>\n
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Man-riding winch on an offshore platform utility crane. The 401W1 brake safety factor calculation came in at 2.8 for our maximum personnel load \u2014 well above the LOLER minimum of 1.5 and comfortably within our company standard of 2.0. The unit passed the 6-monthly thorough examination without any findings across the first two inspections. Brake engagement is consistent and the holding test (full load, 10-minute static hold) showed zero drift. For a personnel lifting application, that consistency is everything.<\/p>\n<\/div>\n
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Yuki T. \u2014 Marine Equipment OEM Engineer<\/div>\n
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Anchor winch for a 35-metre aluminium patrol vessel. The 401W1 handles a 280 kg anchor on 60 metres of 12 mm chain at 8 m\/min hoisting speed. The sealed housing was essential \u2014 the winch is mounted on the foredeck and takes green water over the bow in heavy weather. After 14 months including two typhoon seasons, the seals are intact and the oil is clean. The 270 Nm brake holds the anchor against 3-knot current drift without any creep. Class survey passed without comment.<\/p>\n<\/div>\n
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Rachel H. \u2014 Construction Safety Manager<\/div>\n
\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u043d\u0430\u044f \u043f\u043e\u043a\u0443\u043f\u043a\u0430 \u00b7 \u041c\u0430\u0439 2026 \u0433.<\/div>\n<\/div>\n
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Window-cleaning platform winch for a 22-storey commercial building. The 401W1 lifts two technicians plus equipment (total 320 kg) at 12 m\/min. The brake safety factor certified at 3.1 \u2014 exceeding our insurance company minimum of 2.5 for suspended personnel platforms. The 4-star rating is because the technical documentation supplied with the unit did not include a pre-formatted brake safety factor certificate template. For personnel lifting, the end user always needs this document for their safety file and having a template pre-filled with the unit serial number, brake torque, and ratio would save approximately 2 hours of administrative time per installation. The drive itself is mechanically sound and the certification process was smooth once we prepared the documentation manually.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"
The brake tells you who this winch drive is for. The EP-401W1 delivers 1,300 Nm through a single planetary stage \u2014 49% more torque than the entry-level 400W1 \u2014 but the real story is the 270 Nm fail-safe parking brake, which is more than double the 400W1 capacity. That doubling exists because the 401W1 serves applications where the load hanging on the cable is not a pallet of bricks but a platform carrying people. Personnel hoisting, offshore man-riding winches, and rescue davits operate under regulatory frameworks that demand brake holding capacity at 1.5-2.0 times the maximum suspended load \u2014 a margin the 130 Nm brake on the 400W1 simply cannot provide for heavier loads. The 401W1 winch drive planetary gearbox is the single-stage model that clears those regulatory thresholds.<\/div>","protected":false},"featured_media":939,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[969],"product_tag":[],"class_list":["post-929","product","type-product","status-publish","has-post-thumbnail","product_cat-winch-drive-planetary-gearbox","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/planetary-gearboxes.com\/ru\/wp-json\/wp\/v2\/product\/929","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/ru\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/ru\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ru\/wp-json\/wp\/v2\/comments?post=929"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ru\/wp-json\/wp\/v2\/media\/939"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/ru\/wp-json\/wp\/v2\/media?parent=929"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ru\/wp-json\/wp\/v2\/product_brand?post=929"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ru\/wp-json\/wp\/v2\/product_cat?post=929"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/ru\/wp-json\/wp\/v2\/product_tag?post=929"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}