
WP · cast-iron worm gearboxes
The WP family is a cast-iron worm gearbox route for machinery where the transmission needs to change direction and the installed arrangement matters as much as the product designation.
- cast-iron worm gearbox
- the driven equipment, mounting form
- the space available around the drive
Catalogue form references

WPS
the driven equipment, mounting form
Source: HaoRan catalogue 2026, e-page 14

WPO
the driven equipment, mounting form
Source: HaoRan catalogue 2026, e-page 15
The WP family is a cast-iron worm gearbox route for machinery where the transmission needs to change direction and the installed arrangement matters as much as the product designation. A useful inquiry begins with the driven equipment, mounting form, existing unit where applicable and the space available around the drive. It does not begin by assuming that a matching name alone confirms the machine interface.
Read the mounting form with the machine
Foot-mounted, flange-mounted, shaft-oriented and vertical installation contexts can place the gearbox in very different relationships to the machine frame, driven shaft, motor and maintenance access. A mounting form is therefore part of the equipment review, not a cosmetic suffix. Clear site photos and a drawing where available let the discussion identify which surfaces, shaft connections and clearances need confirmation.
Cast-iron housing in the application context
The housing material is only one part of the selection conversation. The machine may be a conveyor, mixer, packaging unit, agricultural machine or another right-angle drive application. Dust, humidity, washdown exposure, repeated starts, changes in material flow and access for inspection can all affect the required review. If the machine has a failed installed unit, include the failure context rather than treating the inquiry as a simple designation swap.
A controlled replacement path
For replacement work, send the nameplate, a complete view of the installation, the driven-equipment name and the available mounting space. HaoRan Transmission can identify the relevant family discussion and list the dimensions or operating evidence still required. This confirms the mounting information needed before quotation; it is not a direct-replacement promise.
OEM, packing and delivery conversation
OEM nameplate requirements can be discussed when the approved identification and machine context are supplied. MOQ, lead time, packing, warranty expectations, payment terms and delivery routing are agreed against the specific order. Where a Central Asian shipment uses rail or land transport, the packing and export documentation are reviewed with the destination and complete drive assembly in mind.
Full technical data sheet available on request
FAQ
What should I photograph for a WP gearbox inquiry?
Photograph the nameplate, the gearbox from the mounting side, the connected shaft area and the surrounding machine space. Add the driven-equipment name and any drawing that shows the installed interface.
Can WP mounting forms be chosen without a site photo?
An initial product-family discussion can start without one, but the mounting form must be checked against the actual equipment before a quotation can be confirmed.
Can you support a distributor replacement inquiry?
A distributor can send end-user evidence through the same route. Keeping the application, installation photos and required documentation together reduces the chance that a commercial handoff loses a critical interface detail.
Installation questions to resolve before release
Before an order is released, the customer and technical reviewer should agree which mounting surface carries the unit, how the driven shaft is coupled, where the motor sits and how the assembly will be handled during installation. A cast-iron housing does not remove those questions. It makes the physical installation evidence and the intended service route more important, especially where the machine frame has limited access or a replacement must be coordinated with a shutdown.
If a drawing cannot be supplied, multiple clear photographs from the mounting, input and output sides can still establish a useful review record. The reply should state the remaining unknowns rather than convert an incomplete visual comparison into a claimed fit.
WP or NMRV: review the housing and installation


| Review point | WP | NMRV |
|---|---|---|
| Housing | Cast-iron housing.Source: WP SERIES product guidance — opening paragraph | Aluminium housing.Source: NMRV SERIES product guidance — opening paragraph |
| Mounting forms | Foot-mounted forms illustrated; other installation forms require machine review.Source: HaoRan catalogue 2026, e-page 14 | Catalogue NMRV+F flange form; confirm the actual interface.Source: HaoRan catalogue 2026, e-page 10 |
| Output shaft | Solid output shafts shown; confirm the selected form.Source: HaoRan catalogue 2026, e-page 14 | Hollow output shown on the illustrated NMRV+F form; confirm the selected shaft.Source: HaoRan catalogue 2026, e-page 10 |
| Catalogue page | WP mounting forms on e-page 14.Source: HaoRan catalogue 2026, e-page 14 | NMRV+F on e-page 10; RVE double-stage arrangements on e-page 13.Source: HaoRan catalogue 2026, e-page 10 |
Housing material and the illustrated form do not establish dimensional interchangeability. Confirm the actual machine interface.

Inside the workshop
A view of the workshop. Product configuration is reviewed against your machine and application.
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