QJM family · Variant and offer review
QJM ball-piston motor family
The official QJM entry lists radial ball-piston low-speed motor references and separate two-speed/brake and central-hole groupings. A specific code and supply condition are still required.
A family page contains different configurations
Preserve the entire designation, including suffixes.
The official entry is headed with 1QJM001/02/10/11/12/21/32/42/52/62 series and identifies a radial ball-piston low-speed motor family. It also lists additional 1QJM/2QJM references. [1] The examples below retain its exact strings; they are not a decoded order key or a performance table.
| Source group | Published examples | What to resolve |
|---|---|---|
| Initial named references | 1QJM001-0.063; 1QJM11-0.5; 1QJM21-1.0 | Complete offered code, displacement unit and current rating sheet |
| S / SZ reference lists | 1QJM02-0.32Z; 1QJM21-0.63SZ; 1QJM32-1.0S | Actual suffix meanings and included features |
| Source heading: two-speed variable, with brake | 2QJM32-0.63S; 2QJM32-0.63SZ; 2QJM32-4.0SZ | Which exact offered code includes which brake/speed arrangement |
| Source heading: through-hole motor | 1QJM01-0.16T40; 2QJM21-0.63T65; 2QJM52-4.0T80 | Actual bore drawing, passage clearances and installation |
No displacement, torque or pressure is inferred from an unqualified decimal/suffix. The source includes irregular strings, including “2QJM32-1.2575”; do not silently repair an order reference. Ask the supplier to return a controlled code/drawing rather than copying a possible typographical error into an order.
Brake and central-hole features change the integration task
Speed change and brake
Obtain the hydraulic schematic, changeover conditions, operating envelope for each mode and the supplied brake/control arrangement. Ask for brake holding/release requirements and the assembled mechanism’s acceptance basis.
Through-hole installation
Return a section and mounting drawing showing the usable central passage, shaft/coupling, flange and any hoses/cables or driven elements passing through it. The T40/T65/T80 strings do not replace an approved dimension sheet.
The source’s grouping does not establish a universal meaning for every S, Z or T suffix. Nor does it state that any catalogue brake is approved to hold a suspended load. Treat the actual full-code drawing, circuit and intended use as one review package.
Record the condition of the quoted motor
Ninggong’s service business covers manufacture/sales, repairs, used dismantled units and remanufactured options. [2] The QJM page itself does not assign one origin or supply condition to every offer.
- New unit
- Actual manufacturer, full code, identity/traceability and current configuration documents
- Repaired or remanufactured unit
- Original identity, performing party, repair/replacement scope, final condition and actual return test
- Used unit
- Known history/condition, inspection evidence and explicitly agreed warranty terms
The service page’s 3–12-month assembly warranty is a range, not an automatic twelve-month guarantee for this motor. Agree the quotation-specific duration, start date, exclusions and remedy.
A test report should answer the operating question
The company describes 90 kW monitoring equipment for hydraulic pump/motor work. [3] That is a self-reported bench capability, not this motor’s rated power or proof it passed a test.
- Define the point. Required torque/speed and duty, available flow/pressure, fluid/temperature and actual selected mode.
- Define the record. Exact unit/code, method, measured results, relevant dimensional/functional checks and agreed acceptance limits.
- Define the system trial. Installation, starting/stopping, speed change and any brake/control function in the actual mechanism, under a competent agreed procedure.
ISO 4409’s abstract concerns steady-state performance testing and reporting. [4] It does not supply the missing QJM operating values or establish complete-drive safety.
Can the motor be compared just by “QJM21”?
The website lists several QJM21 references and suffix variants. Compare full codes, exact interfaces, performance envelopes and supplied condition.
Send a full-code and condition request
Sources & review
- Ninggong detailed QJM entry ↗
Full named model examples and source grouping for two-speed/brake and centre-hole variants; no readable numeric exact-code rating table established.
2026-10-11 - Ninggong supply and service conditions ↗
Multiple supply conditions and quote-dependent 3–12-month assembly warranty. Does not assign one condition to this QJM entry.
2026-10-11 - Ninggong company/testing statement ↗
Company self-reported 90 kW monitoring equipment; not a QJM output rating or an actual delivered-unit test.
2026-10-11 - ISO 4409:2019 publisher abstract ↗
Steady-state hydraulic-component test presentation; not a QJM report or series-wide conformity.
2026-10-11
Specifications come from the manufacturer’s published information and the sources above; buying advice is written by CivilEquip with AI assistance. Ask the manufacturer to confirm the data for your configuration. Editorial policy · Report a correction.