CH-SP185 Water Pump Pulley PK7 106mm OD | Ever Power
The CH-SP185 is a PK7 Poly-V water pump pulley with a 106mm outer diameter, engineered for reliable coolant circuit drive performance. Precision-machined to a bore diameter 15.82+0.027mm, it delivers consistent shaft seating and minimal runout across its service life. Manufactured from precision cast iron with anti-rust surface treatment under ISO 9001-certified production processes. OEM reference SG2333-05C supports direct procurement matching. Suitable for direct OEM replacement.
CH-SP185 Water Pump Pulley PK7 106mm OD | Ever Power
CH-SP185 – PK7 Poly-V | 106mm ODThis water pump pulley replacement is engineered specifically for compatible industrial and automotive engines, offering a 106mm outer diameter and a 15.82+0.027mm precision-bored shaft seat. The PK7 Poly-V contact profile ensures uniform belt engagement with minimal slippage under sustained thermal and mechanical loads.
The CH-SP185 is produced from precision cast iron with an anti-rust surface treatment applied post-machining, protecting against corrosion in under-bonnet environments where coolant exposure and condensation are routine. Casting and machining processes maintain tight dimensional tolerances on both the outer diameter and bore, contributing to consistent rotational balance and reduced vibration throughout the drive loop.
Hangzhou Ever-Power Transmission Co., Ltd. has been manufacturing automotive pulleys for more than 8 years under ISO 9001-certified quality management. The production range covers 450+ engine variants across American, Japanese, Korean, and European vehicle platforms. Every unit undergoes dimensional verification at multiple production stages before shipment.
Product Specifications
| Field | Value |
|---|---|
| Model | CH-SP185 |
| OEM No. | SG2333-05C |
| Out Dia (mm) | 106 |
| Bore Dia (mm) | 15.82+0.027 |
| Belt Type | PK7 Poly-V |
| Used Vehicle | N/A |
| N.W. (kgs) | N/A |
| Remark | 먦·¢ |
CH-SP185 engine water pump pulley – Key Product Features
106mm Outer Diameter – Designed Drive Ratio Compliance
The 106mm OD is machined to tight roundness tolerances, ensuring the belt traces a true circular path during rotation. Deviation from the nominal OD alters the pump-to-crankshaft speed ratio, reducing coolant flow at operating RPM and compromising thermal management.
15.82+0.027mm Precision Bore – Concentric Shaft Seating
The 15.82+0.027mm bore is CNC-machined with concentricity verified in-process. Eccentric bore produces lateral runout on the pump shaft, introducing a cyclical imbalance force at every revolution that accelerates bearing wear and risks premature pump seal failure.
Precision Cast Iron Construction
Cast iron provides high compressive strength and dimensional stability under repeated thermal cycling. The material resists deformation at elevated under-bonnet temperatures, maintaining belt alignment and OD geometry across the full engine operating range.
Anti-Rust Surface Treatment
Post-machining surface treatment protects the pulley body against oxidation from coolant spray, condensation, and humidity. Extended corrosion resistance prevents surface roughening on the belt contact face that would accelerate belt wear rates.
ISO 9001-Certified Production
Manufacturing under ISO 9001 certification means documented process controls govern each production stage from raw material intake through final inspection. Dimensional data is available on request, supporting procurement teams that require verified specifications before order placement.
PK7 Poly-V Profile – Optimised Belt Engagement
The PK7 Poly-V profile is machined to consistent geometry across the full contact surface, ensuring even load distribution and predictable belt wear rates over the service interval. Profile accuracy is critical to preventing uneven rib or face contact that causes localised belt fatigue.
OEM Cross Reference and Compatible Applications
| OEM Number | Compatible Engine / Brand | Fitment Notes |
|---|---|---|
| SG2333-05C | Compatible PK7 Poly-V drive systems | Confirm bore 15.82+0.027mm before ordering |
When using this cross-reference to verify fitment, always confirm the outer diameter, bore diameter, and belt groove type against your original parts documentation. For PK7 Poly-V systems, groove count and profile geometry verification is essential before installation.
If your engine model is not listed above, submit the original OEM part number or vehicle identification details to Ever Power for a compatibility assessment. The engineering team maintains an extensive application database and can advise on fitment in the majority of cases without requiring a physical sample.
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How the CH-SP185 Drive System Works
The CH-SP185 operates as an automotive water pump pulley within the engine's accessory drive system, transmitting rotational energy from the crankshaft to the water pump impeller via pk7 poly-v drive. The drive mechanism relies on Poly-V 7-rib engagement: each rib creates a lateral contact line, collectively distributing drive torque across 7 parallel points, which improves lateral stability, increases power density per unit belt width, and reduces slip at sustained high RPM.
As the crankshaft rotates, torque passes through the pk7 poly-v to the CH-SP185, spinning the water pump impeller. The impeller draws coolant from the radiator lower outlet, forces it through the engine block and cylinder head water jackets, and returns it to the radiator for heat dissipation. The 106mm outer diameter sets the pump speed relative to the crankshaft, directly governing coolant flow rate across the engine's RPM range.
For applications requiring alternative grooved drive configurations, Ever Power also supplies V-Belt Pulleys across a wide OD and groove count range. The 15.82+0.027mm bore must be held to tight concentricity tolerances during machining. At a 106mm outer diameter, any bore eccentricity is amplified in its rotational effect. A bore that is off-centre produces measurable runout at the outer diameter, introducing a cyclical radial force into the pump shaft bearing at every revolution. Over time, this unbalanced load causes uneven bearing race wear and increased seal leakage risk. Ever Power's CNC boring and in-process concentricity verification address this before the part is released from production.
Ever Power vs Industry Brands
The comparison below covers the dimensions most relevant to workshop buyers and fleet procurement teams evaluating water pump pulleys.
| Dimension | Gates | Dayco | Bando | INA | Ever Power |
|---|---|---|---|---|---|
| Price Competitiveness | Moderate | Moderate | Moderate | High | Competitive |
| Delivery Lead Time | Standard | Standard | Standard | Standard | Shorter |
| OEM Coverage | Broad | Broad | Comparable | Comparable | Broader (450+ variants) |
| Custom Capability | Limited | Limited | Limited | Limited | Wider |
The Ever Power catalogue extends beyond water pump pulleys to include power steering pump pulleys and other accessory drive components, enabling consolidated procurement across multiple engine drive systems. Direct-from-manufacturer supply removes intermediate distribution margins, reflected in unit pricing that is competitive relative to branded alternatives. Custom bore diameters and outer diameters are available by drawing or sample submission.
What Buyers Say
Fitted the CH-SP185 as a direct replacement on a fleet maintenance programme. The 106mm OD matched our specification exactly and the 15.82+0.027mm bore seated cleanly on the pump shaft without rework. Lead time from Ever Power was shorter than our previous supplier for this part. No fitment issues reported across the first batch of installations.
James T. — United States
Sourced for a workshop covering PK7 Poly-V drive systems. The groove profile was consistent and cleanly machined across all units. Bore diameter measured within the stated 15.82+0.027mm specification on our checking fixture. Packaging was adequate for the transit distance. Would order again for similar fitments.
Klaus M. — Germany
The OEM cross-reference data made procurement matching straightforward. Dimensional report provided on request matched the physical parts. Anti-rust coating showed no degradation after storage prior to installation. Belt fitment was clean with no misalignment noted during test running.
David W. — United Kingdom
Used on a fleet covering multiple vehicles with PK7 Poly-V water pump drives at 106mm OD. Consistent dimension unit to unit, which matters when fitting multiple vehicles to the same specification. Delivery was within the quoted window. No issues from the workshop team across the first batch.
Mark H. — Australia
Verified the OEM reference against our parts database before ordering. Physical units arrived within tolerance on all measured dimensions. Surface finish on the pk7 poly-v contact face was clean without visible machining defects. Evaluating further models from the CH-SP series for broader fleet coverage.
Tariq A. — United Arab Emirates
We stock these for an aftermarket parts distribution business. The CH-SP185 at 106mm OD moves well because it covers several compatible engine variants. Cast iron build quality is evident from the weight and finish. Customer returns have been minimal and no fitment complaints from the workshops we supply.
Lim B. — Malaysia
Ordered a sample batch to assess dimensional consistency. Bore diameter on all units measured within the 15.82+0.027mm specification on our calibrated equipment. Surface texture consistent. Lead time acceptable for our planning cycle. Proceeding with a larger order based on this evaluation.
Carlos F. — Brazil
Used in a replacement programme for engines with pk7 poly-v water pump drive. The CH-SP185 matched the original OD and bore dimensions precisely, simplifying installation. Cast iron material and surface treatment are appropriate for the application. Satisfied with quality relative to price.
Pierre D. — France
Procurement for a workshop chain. The CH-SP185 at 106mm OD covers a segment of our vehicle range that was underserved by our previous supplier. Dimensional consistency across the delivery was good. Will continue evaluating further models from Ever Power.
Sipho N. — South Africa
Frequently Asked Questions
What is the bore diameter tolerance for the 15.82+0.027mm bore?
The nominal bore diameter is as stated in the specification table. Production dimensional documentation showing the applied tolerance band is available on request. Contact Ever Power with your application details to obtain the relevant specification sheet before placing an order.
How do I confirm the CH-SP185 fits my engine?
Cross-reference the OEM part number listed above against your original equipment documentation. If this reference does not appear in your parts database, provide the original OEM number or vehicle identification details to Ever Power. The team can verify dimensional compatibility and advise on whether a sample should be obtained for physical fitment testing.
What material is used?
The CH-SP185 is manufactured from precision cast iron with an anti-rust surface treatment applied post-machining. Cast iron was selected for its compressive strength, dimensional stability under thermal cycling, and compatibility with standard pk7 poly-v drive systems. Material certification is available for industrial procurement requirements.
Can Ever Power produce a custom bore or OD variant?
Yes. Custom bore diameters, outer diameters, and groove configurations are available where production volumes justify tooling investment. Submit a drawing or sample component for quotation. Minimum order quantities for custom variants differ from standard stock items and are confirmed during the quotation process.
What is the minimum order quantity?
MOQ for standard catalogue items is flexible and depends on order mix and destination. Contact Ever Power directly with your required quantity for a confirmed MOQ and pricing. Sample orders for fitment verification can typically be accommodated below standard MOQ thresholds.
What is the typical lead time?
Lead times for standard stock items are shorter than industry average due to Ever Power's in-house production capability. Specific commitments are confirmed at order placement and depend on quantity, current production scheduling, and destination country logistics.
How is the product packaged for export?
Standard export packaging protects the pulley against surface damage and corrosion during international transit. Individual units are wrapped and packed in cartons sized for efficient palletisation. Custom labelling and barcode requirements can be accommodated for distributor and retailer accounts. Packaging specifications are confirmed at order stage. For buyers consolidating accessory drive orders, tensioner pulleys are available from the same Ever Power catalogue and can be combined in a single shipment.
About Hangzhou Ever-Power Transmission Co., Ltd.
Hangzhou Ever-Power Transmission Co., Ltd. is one of the leading manufacturers of automotive pulleys, engine pulleys, lawn and garden machinery pulleys, agricultural and construction machinery pulleys. Since establishment, the company has experienced rapid development over more than 8 years, driven by continuous product expansion and uncompromising quality standards. To meet the growing global demand, Ever Power continuously invests in mold design, new product development, and equipment upgrades. We leverage automated rubber injection and press-fit ring technologies to deliver highly competitive, high-performance products worldwide. Our quality system is certified to ISO 9001:2000 and ISO/TS 16949:2000. Our product range covers 450+ engine variants serving passenger cars, SUVs, and light commercial vehicles across American, Japanese, Korean, and European platforms. Domestic OEM partners include Zhejiang Quanxing Group, Zhejiang Sangong, China Ruili Group, Henan Feilong, Kunming Yunnei Power, Harbin Dongan Automotive Engine, Zhejiang Geely, Chery Automobile, BYD Auto, Chongqing Changan, and Shaanxi Heavy Truck.
We also manufacture: power steering pump pulleys, tensioner pulleys, and lawn mower machinery pulleys.
We promise will offer the best price by the high quality in china! We also accept special order about the products. If you are interested in our products. Please do not hesitate to let us know.We are pleased to give you the detailed information.We promise that our products would be safety and were in high quality and reasonable price. If you are interested in our products, please contact us asap.We are sincerely looking for your cooperation.
Most of our products are exported to Europe or Americas, both standard and nonstandard products available. We can produce as per your drawing or sample. Material can be standard or as per your special request. If you choose us, you choose reliable.
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