Description
WH1 Light-Industrial Cast-Iron Oldham Coupling — High-Speed Light-Duty Drive Joint
The WH1 light-industrial Oldham coupling opens the WH family with an interesting engineering proposition: a cast-iron hub coupling sized for the high-speed light-duty envelope where precision-coupling and industrial-coupling architectures overlap. With 16 N·m rated torque, 10–14 mm bore range, and an unusually high 10 000 rpm permissible speed, the WH1 is sized for high-speed air-blower drives, dental and laboratory centrifuges, benchtop CNC and engraving-machine spindles, and the smaller end of high-frequency rotating equipment. The cast-iron hub architecture delivers a cost-economic position substantially below precision-aluminum couplings (EP6 family), while the elevated RPM envelope distinguishes the WH1 from the larger SL family designed for slow-speed heavy-torque duty.
For OEM equipment designers specifying a coupling for high-speed light-duty applications, the WH1 occupies a unique value position. The 10 000 rpm rating supports applications where bellows and disc-pack couplings are typically over-specified, while the cast-iron section accommodates the modest torque demands and substantial misalignment envelope of frame-mounted light industrial equipment. The WH family is particularly competitive in retrofit applications — replacing aged GBC, Falk, or generic-spider coupling specifications on legacy light-industrial equipment where the original specification has been discontinued or has become economically inefficient to maintain.
Specifications
| Parameter | Value |
|---|---|
| Model | WH1 |
| Nominal Torque (Tn) | 16 N·m |
| Permissible Speed (n) | 10 000 rpm |
| Bore Range (d) | 10 – 14 mm |
| Outside Diameter (D) | 46 mm |
| Overall Length (L) | 56 mm |
| Slider Material | Hardened steel 45-steel |
| Hub Material | HT200 / HT250 cast iron |
| Radial Misalignment (Δy) | 0.4 mm |
| Angular Misalignment (Δα) | 0.5° |
| Axial Misalignment (Δx) | 0.3 mm |
| Mass | 600 g |
| Shaft Engagement | Keyway + setscrew |
| Lubrication | Grease (re-pack annually) |
Materials
HT200 / HT250 Cast Iron Hubs
Hubs are sand-cast in HT200 (light-duty applications) or HT250 (general industrial duty) grey iron, with stress-relief annealing prior to all machining operations. The cast-iron section provides cost-economic strength at the WH1’s modest torque demands, with substantial fatigue-life margin under high-speed steady-state operation. For applications requiring precision-balanced hub mass, ISO 1940 G6.3 grade balance up to 10 000 rpm is the standard catalogue specification.
Hardened Steel Cross-Slider
The cross-slider is precision-machined from 45-steel medium-carbon bar, induction-hardened on the four sliding-wear faces to HRC 45–55 surface hardness. The steel slider delivers the wear endurance and shock-load capacity that cast-iron hubs alone cannot provide. For applications requiring polymer-slider electrical isolation (rare at this size class), POM-C slider variant is documented and available through engineering review.
Standard Keyway-and-Setscrew Mounting
Standard H7-reamed hub bore with parallel keyway to GB/T 1096 (DIN 6885 / JIS B 1301). M5 set-screw for axial location. The cast-iron section’s machinability accommodates custom-bore variants without specialised tooling, making the WH1 a flexible specification for legacy-equipment retrofit applications where shaft dimensions may not conform to current industry standards.
Engineering at the Precision-Industrial Crossover
The WH1’s 10 000 rpm permissible speed places it firmly into the precision-application envelope. At this rotational speed, the coupling’s contribution to system-level dynamic performance becomes a meaningful design consideration: residual unbalance produces measurable vibration, sliding-velocity at routine misalignment generates noticeable heat, and bearing-load contribution affects the host equipment’s mechanical-life calculation. The WH1’s response to these dynamics is the cast-iron-and-hardened-steel material stack — the cast iron’s inherent vibration-damping properties combined with the steel slider’s wear endurance produce a coupling that operates predictably across the full RPM range.
For OEM equipment integrators, the WH1’s specific value comes from its position in the precision-industrial crossover region. Below this size class, the EP6/EP6C precision-aluminum couplings offer higher precision performance at higher unit cost. Above this size class, the larger WH family members offer higher torque capacity at lower permissible speeds. The WH1 fits precisely the high-RPM light-industrial application class — particularly the substantial population of legacy industrial equipment where the original coupling specification is no longer commercially supported, and the host equipment’s value proposition does not justify a precision-aluminum upgrade.
For broader engineering background on retrofit-class coupling specification, see Ever-power’s light-industrial coupling engineering portal.
Industry Applications
High-Speed Air Blowers
Drive couplings on small high-speed industrial air blowers used in textile-fibre transport, light pneumatic-conveying installations, and small dust-collection systems. The 10 000 rpm capability accommodates the upper-frequency range of blower-design rotation speeds.
Dental & Lab Centrifuges
Drive couplings on dental-laboratory centrifuges, small biological-research centrifuges, and benchtop laboratory rotary equipment. Cast-iron section damps motor-side vibration that would otherwise interact with sample-quality outcomes.
️ Benchtop CNC Spindles
Drive couplings on benchtop CNC engraving machines, small jewellery-trade milling spindles, and PCB prototyping CNC equipment. Substantial misalignment envelope absorbs frame-fabrication tolerance of benchtop-class equipment.
Small Hand-Tool Factory
Drive couplings on small belt-grinder, bench-buffer, and hand-tool factory production lines. Light-duty cost-economic specification for high-cycle production-tool environments.
️ Small Vacuum Pumps
Drive couplings on small commercial-vacuum pump installations — laboratory-research vacuum, light-industrial degassing, and benchtop vacuum-handling equipment.
Legacy-Equipment Retrofit
Replacement-coupling specifications for legacy industrial equipment where original GBC, Falk, or generic-spider coupling specifications are no longer commercially supported. Cast-iron architecture matches the engineering profile of legacy designs without retrofit-related installation modifications.
Why Choose Ever-power
Quality & Compliance
WH1 production runs under ISO 9001:2015. Cast-iron melt traceability with chemical-composition certification per heat. Documentation pack covers RoHS, REACH, and CE conformity declarations. For laboratory and medical-equipment customers, supplementary documentation supporting ISO 13485 integration is available. For retrofit-application customers, dimensional-compatibility statements for common legacy coupling specifications can be supplied on engineering enquiry.
Customisation
Catalogue bore range 10–14 mm; custom-bore variants from 8 mm to 16 mm produced under engineering review with 1-week lead time. Imperial-bore variants (3/8″, 1/2″, 9/16″) supported. ISO 1940 G2.5 precision-balance variant for very-high-speed applications above 8 000 rpm. POM-C slider variant for electrical-isolation deployments.
Aftermarket
WH1 slider plates stocked under part WH1-SLIDER for 1-business-day shipment. 600 g mass per coupling supports air-freight standard. English-speaking engineering desk responds within 24 hours. For retrofit-application customers, dimensional-cross-reference databases supporting identification of legacy coupling specifications are routinely consulted by Ever-power engineering on customer enquiry.
Customer Reviews & Case Studies
★★★★★
Afghanistan — Textile-Equipment Operator
Used in: Air-blower drive coupling on a textile-fibre pneumatic-conveying line.
Feedback: “Original GBC spider coupling specification was discontinued, leaving us with a substantial fleet of legacy blower drives with no replacement-part path. The WH1 with dimensional-compatibility verification fitted directly into the existing host shafts without modification. Five years of continuous duty across approximately 40 blower installations with no coupling-attributable downtime events. Excellent retrofit specification supporting our continued operation of legacy equipment.”
★★★★★
Bhutan — Hydroelectric Maintenance Facility
Used in: Benchtop CNC engraving-machine spindle drive on a hydroelectric-station maintenance workshop.
Feedback: “Remote facility location made original-OEM coupling sourcing impractical. Specified the WH1 as a standard-catalogue replacement; engineering response on dimensional-compatibility was within 24 hours. Three years of routine workshop duty without any coupling-attributable issues. The cast-iron section has been particularly tolerant of the dusty workshop ambient that had been problematic for our previous aluminum-coupling specification.”
★★★★☆
Maldives — Medical-Equipment Service Provider
Used in: Laboratory-centrifuge drive coupling replacement on hospital diagnostic-equipment installations.
Feedback: “Island geography makes original-OEM coupling sourcing slow and expensive. The WH1 with ISO 1940 G2.5 precision-balance upgrade has handled centrifuge service across multiple installations over 3 years. Vibration-level measurements remain within original OEM specifications. Knock one star only because the precision-balance variant’s lead time was 3 weeks rather than the standard 1 week — engineering supported through expedited production for our subsequent orders. Otherwise excellent.”
Frequently Asked Questions
How does the WH1 compare to a precision EP6 coupling at this size?
The EP6-40 precision-aluminum coupling at the same bore range offers approximately 35 % lower mass, higher precision-balance grade, and smaller catalogue lead time. The WH1 offers approximately 50 % lower acquisition cost, substantially better vibration damping through cast-iron hub material, and the field-service track record of legacy-equipment compatibility. For OEM new-equipment design, EP6 is typically the preferred specification; for retrofit, light-industrial, and cost-economic applications, the WH1 wins.
Can the WH1 operate up to 10 000 rpm continuously?
Yes, with appropriate balance specification. The standard WH1 catalogue specification is ISO 1940 G6.3 balance grade, suitable for continuous operation up to approximately 6 000 rpm. For continuous operation between 6 000 and 10 000 rpm, the G2.5 precision-balance variant is the engineering-required specification. Higher operating speeds are not supported at this size class.
What is the legacy-coupling cross-reference process?
Ever-power maintains a substantial cross-reference database covering common discontinued coupling specifications from GBC, Falk, KTR, and other legacy industrial-coupling brands. For retrofit specifications, the customer provides the legacy coupling’s dimensional drawing or measurement set, and engineering supplies a documented compatibility statement identifying the appropriate WH-family replacement specification. The process typically completes within 24 hours.
Is the WH1 supplied with installation hardware?
Each WH1 coupling ships with the four set-screws required for hub-to-shaft axial location, packaged separately in a labelled small-parts bag. Keyway-and-keystock hardware is not included as standard, since legacy-equipment installations typically have existing keyways. For new-equipment installations requiring complete hardware sets, please specify at order entry and Ever-power will supply matching keystock to the shaft-key specification.
What is the documented service life under typical light-industrial duty?
Under typical light-industrial duty (50–60 % rated load, 6 000 rpm average, parallel offset below 0.2 mm), the WH1’s hardened-steel slider typically remains in service for 8–10 years before wear-related replacement becomes appropriate. The cast-iron hub section retains dimensional accuracy across multiple slider-replacement cycles, typically remaining in service for 15–20 years across the installed life of the host equipment.
Quote WH1 for High-Speed Light-Industrial Drives
For high-speed air-blower, dental and laboratory centrifuge, benchtop CNC spindle, small hand-tool, vacuum-pump, and legacy-equipment retrofit applications, the WH1 is Ever-power’s cost-economic specification of choice for high-RPM light-industrial duty. Browse the wider WH series catalogue, read about Ever-power’s retrofit-application capability, or move directly to a B2B enquiry below.