{"id":1794,"date":"2026-09-29T11:28:20","date_gmt":"2026-09-29T03:28:20","guid":{"rendered":"https:\/\/jdrkcn.com\/?post_type=news&p=1794"},"modified":"2026-09-29T11:50:49","modified_gmt":"2026-09-29T03:50:49","slug":"holeless-vs-roped-hydraulic-elevators-key-differences","status":"publish","type":"news","link":"https:\/\/jdrkcn.com\/ja\/\u30cb\u30e5\u30fc\u30b9\/holeless-vs-roped-hydraulic-elevators-key-differences\/","title":{"rendered":"Holeless vs Roped Hydraulic Elevators: Key Differences"},"content":{"rendered":"

JDRK’s \u6cb9\u5727\u5f0f\u5bb6\u5ead\u7528\u30a8\u30ec\u30d9\u30fc\u30bf\u30fc<\/a> is documented as zero-pit or shallow-pit, with a 150 mm minimum pit, no machine room, and no counterweight. What JDRK’s public specifications don’t state is whether its cylinder is holed, holeless, or roped, so those labels shouldn’t be assumed. Confirm cylinder configuration in writing before comparing quotes.
\nCompared with explainers that define the three hydraulic sub-types without any manufacturer specification attached, this guide separates what is general industry usage from what JDRK has actually published. That matters because “holeless,” “shallow-pit,” and “roped” describe three different design choices, and quotes that use the words interchangeably are hard to compare.<\/p>\n

\"\u6cb9\u5727\u5f0f\u5bb6\u5ead\u7528\u30a8\u30ec\u30d9\u30fc\u30bf\u30fc\"<\/p>\n

Holed, Holeless, and Roped Compared<\/h2>\n

The terms below reflect general industry usage; exact designs vary by manufacturer, so treat the table as a vocabulary guide, not a specification.<\/p>\n\n\n\n\n\n\n\n\n
Dimension<\/td>\nHoled (In-Ground Cylinder)<\/td>\nHoleless<\/td>\nRoped Hydraulic<\/td>\n<\/tr>\n
Cylinder Location<\/strong><\/td>\nExtends into a bore drilled below the pit floor<\/td>\nMounted in or beside the shaft; no bore drilled<\/td>\nCylinder connected to the cab through ropes and a sheave<\/td>\n<\/tr>\n
Site Drilling<\/strong><\/td>\nRequired<\/td>\nNot required<\/td>\nDepends on the roping layout<\/td>\n<\/tr>\n
Cab Travel vs. Ram Stroke<\/strong><\/td>\nEqual (direct-acting)<\/td>\nEqual or telescoping<\/td>\nCab travels a multiple of the ram stroke, so the cylinder can be shorter<\/td>\n<\/tr>\n
Main Site Constraint<\/strong><\/td>\nGround conditions and groundwater at the bore<\/td>\nSpace beside the cab for the cylinder<\/td>\nSheave and rope clearance overhead<\/td>\n<\/tr>\n
Typical Pairing<\/strong><\/td>\nSites where drilling is practical<\/td>\nRetrofits where drilling is impractical<\/td>\nOften combined with a holeless layout<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Are Holeless and Roped Mutually Exclusive?<\/h2>\n

No, and this is the most common misreading of the title question. “Holeless” answers whether a bore is drilled below the pit. “Roped” answers how the cylinder’s motion reaches the cab. A roped design can be holeless, and some manufacturers describe two-cylinder roped layouts as “dual roped holeless.” Choosing between them as if they were rival categories leads to quotes that don’t line up.
\nA second misreading: zero-pit or shallow-pit does not automatically mean holeless. Pit depth is one measurement; whether a cylinder bore is drilled is another.<\/p>\n

\"\u6cb9\u5727\u5f0f\u30db\u30fc\u30e0\u30f4\u30a3\u30e9\u7528\u30a8\u30ec\u30d9\u30fc\u30bf\u30fc\"<\/p>\n

JDRK’s Hydraulic Domestic Elevator: Published Specs<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/td>\nPublished Value<\/td>\n<\/tr>\n
Drive Principle<\/strong><\/td>\nPressure-driven rise, gravity-driven descent<\/td>\n<\/tr>\n
Speed Control<\/strong><\/td>\nImported high-precision proportional valve; stepless speed regulation<\/td>\n<\/tr>\n
Machine Room<\/strong><\/td>\nNone; installable where top-floor clearance exceeds approx. 2 m<\/td>\n<\/tr>\n
Pit<\/strong><\/td>\nZero-pit or shallow-pit options; minimum pit depth 150 mm where a pit is used<\/td>\n<\/tr>\n
Minimum Customized Shaft Size<\/strong><\/td>\nApprox. 1,100 \u00d7 1,100 mm<\/td>\n<\/tr>\n
Minimum Top-Level Height<\/strong><\/td>\n2,600 mm<\/td>\n<\/tr>\n
Counterweight<\/strong><\/td>\nNone; shaft space utilization up to approx. 70%<\/td>\n<\/tr>\n
Safety Features<\/strong><\/td>\nLight curtain, overspeed governor, safety gear, one-touch emergency dial, Automatic Rescue Device (ARD)<\/td>\n<\/tr>\n
Certification Marks<\/strong><\/td>\nSGS, SGC, SGRZ, CNCA, CNAS, ISO 9001 (company-stated; certificate numbers not publicly disclosed)<\/td>\n<\/tr>\n
\u4fa1\u683c<\/strong><\/td>\nNot published; quote required<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"\u6cb9\u5727\u5f0f\u5bb6\u5ead\u7528\u30a8\u30ec\u30d9\u30fc\u30bf\u30fc\"<\/p>\n

5 Questions to Ask Before You Compare Quotes<\/h2>\n

1.Is the cylinder direct-acting or roped, and what is the roping ratio?
\n2.Is the cylinder single-stage or telescoping?
\n3.Is any bore drilled below the pit floor, and if so, to what depth?
\n4.What pit depth applies to my specific configuration: 150 mm, or zero-pit?
\n5.What top-floor clearance does the ram or sheave assembly need in my shaft?<\/p>\n

Getting a Quote That Can Be Compared<\/h2>\n

JDRK quotes<\/a> are built around your shaft, pit, and load requirements. Send the five questions above with your shaft measurements so the quote states cylinder configuration explicitly.<\/p>\n

FAQ<\/h2>\n

Is a holeless hydraulic elevator the same as a zero-pit elevator?<\/h3>\n

No. Holeless refers to not drilling a bore below the pit for the cylinder; zero-pit refers to the pit depth itself. JDRK documents zero-pit and shallow-pit options (minimum 150 mm where a pit is used) but does not state its cylinder configuration.<\/p>\n

\u00a0Does a roped hydraulic elevator need a machine room?<\/h3>\n

Not inherently. JDRK’s hydraulic domestic elevator is machine-room-less, needing roughly 2 m of clearance above the top floor instead.<\/p>\n

\u00a0Does JDRK’s hydraulic elevator use a counterweight?<\/h3>\n

No. The design has no counterweight, with shaft space utilization up to approx. 70%.<\/p>\n

What is the smallest shaft for JDRK’s hydraulic elevator?<\/h3>\n

Approximately 1,100 \u00d7 1,100 mm customized minimum, with a 2,600 mm minimum top-level height.<\/p>\n

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

JDRK’s hydraulic domestic elevator is documented as zero-pit or shallow-pit, with a 150 mm minimum pit, no machine room, and no counterweight. What JDRK’s public specifications don’t state is whether its cylinder is holed, holeless, or roped, so those labels shouldn’t be assumed. Confirm cylinder configuration in writing before comparing quotes. Compared with explainers that define the three hydraulic sub-types without any manufacturer specification attached, this guide separates what is general industry usage from what JDRK has actually published. That matters because “holeless,” “shallow-pit,” and “roped” describe three different design choices, and quotes that use the words interchangeably are hard to compare. Holed, Holeless, and Roped Compared The terms below […]<\/p>","protected":false},"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","class_list":["post-1794","news","type-news","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/jdrkcn.com\/ja\/wp-json\/wp\/v2\/news\/1794","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jdrkcn.com\/ja\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/jdrkcn.com\/ja\/wp-json\/wp\/v2\/types\/news"}],"replies":[{"embeddable":true,"href":"https:\/\/jdrkcn.com\/ja\/wp-json\/wp\/v2\/comments?post=1794"}],"wp:attachment":[{"href":"https:\/\/jdrkcn.com\/ja\/wp-json\/wp\/v2\/media?parent=1794"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}