GIICL Series Gear Coupling

Start by calculating the design torque, which equals the motor rated torque multiplied by an application service factor — typically 1.5 to 2.5 for a rolling mill main drive depending on the shock load characteristics. Select the GIICL model whose nominal torque rating exceeds this design torque value. Check that the allowable speed column covers your operating speed, and verify that the shaft hole diameter range includes your drive and driven shaft sizes. For steel plant applications, we strongly recommend specifying the surface quenching option on tooth faces and contacting the Ever Power technical team to confirm the selection with a detailed load cycle review before placing an order. This process is complimentary and available directly via email.

Pricing varies substantially across the 25 GIICL size variants because of the significant differences in material weight, machine time, and any optional surface treatments. Smaller models like EP-GIICL1 to EP-GIICL8 are priced considerably lower than large heavy-duty models like EP-GIICL20 and above. The most accurate way to get a price for your specific requirement — including bore configuration, any custom machining, and sea freight to a UK port — is to send an enquiry to [email protected] with your required type number, bore dimensions, quantity, and any special notes. The team typically responds within one business day with a formal quotation including CIF pricing to the UK.

For large pump drives at UK water treatment works, the GIICL series is an excellent match because it accommodates the slow angular shaft displacement that accumulates over years of foundation settlement and thermal expansion without creating damaging bearing loads. Depending on the motor power and pump shaft diameter, models between EP-GIICL10 and EP-GIICL18 cover most medium-to-large pump train requirements. The drum-tooth design also handles the start-stop cycling that characterises water treatment pump operation far better than rigid or semi-flexible alternatives, and the J-type bore option makes the coupling easy to remove and refit during planned maintenance outages without specialist tooling.

In a conventional straight-tooth gear coupling, any angular offset between the two connected shafts forces the gear teeth into edge contact, concentrating stress at one end of the tooth and accelerating wear dramatically. The drum-tooth design curves the tooth profile along a barrel or drum shape in the longitudinal direction. When angular misalignment is present, the tooth contact area shifts along this curved surface rather than concentrating at an edge, maintaining a reasonably even stress distribution across the tooth face width. The external sleeve containing these drum teeth can therefore tilt relative to the inner hubs by a small but practically significant angle — typically up to 1.5 degrees depending on the coupling size — absorbing the misalignment kinematically rather than transmitting it as bending force into the connected shaft line.

Ever Power Coupling Co., Ltd. supplies the GIICL series to UK industrial customers with a full range of customisation options including nitriding, induction surface quenching, custom bore diameters to customer drawings, non-standard keyway geometry, and special-purpose flange configurations. The factory operates an ISO 9001 quality system and provides material certification documents, dimensional inspection reports, and traceability records with every shipment. Enquiries from UK engineering teams can be directed to [email protected]. For urgent replacement projects, the team can advise on the fastest available production and shipping route to reach UK destinations.

For continuously running kiln drives, lubrication intervals depend on operating speed, coupling size, and the ambient temperature at the installation site. A general guideline for the GIICL series is to inspect and top up the coupling grease every six months for continuous operation, with a full grease replacement and tooth inspection at every 12-month planned maintenance outage. The recommended lubricant is a high-viscosity lithium-based gear coupling grease with EP (extreme pressure) additive package — typically an NLGI Grade 1 or Grade 2 product rated suitable for the relevant operating temperature range. For high-temperature zones near the kiln, confirm that the grease base oil has sufficient high-temperature stability and does not bleed at the operating temperature during the longest running period between maintenance shutdowns.

The GIICL series hubs and outer sleeves are manufactured from high-quality structural steel grades with the specific material selected for each size based on the required torque and impact resistance. Gear tooth profiles are precision-machined to achieve tight tooth contact patterns and specified backlash values. Two surface treatment options are available for applications where elevated surface hardness and wear resistance are required: gas nitriding, which achieves a hard surface layer to a specified case depth without dimensional distortion; and induction surface quenching, which provides a harder and deeper hardened zone suited to the highest-cycle, highest-load applications such as rolling mill main drives. Both options must be specified and agreed in the purchase order and cannot be applied retrospectively after machining is complete.

Yes — Ever Power’s manufacturing facility has the capability to machine GIICL coupling bores to any diameter within the permissible range for each model, including non-standard diameters that fall between the catalogue increments. Customers in England, Scotland, and Wales who are replacing ageing couplings on existing machines frequently require bore dimensions that exactly match the original equipment shafts, which may not align with standard catalogue bore steps. Simply provide the required shaft diameter, tolerance class, keyway dimensions (width, depth, and length), and any interference fit specification. The Ever Power engineering team will review the drawing and confirm whether the requested bore is within the structural limits of the chosen model before production. Contact [email protected] with your requirement to begin the review process.