EP-5×2,5 мм еуропалық жұлдызшалар — 03B-1 сериясы
The 03B-1 Series European Sprockets are precision-engineered for power transmission systems, designed to mate seamlessly with 5×2.5mm pitch chains according to DIN 8187 and ISO/R 606 standards. This simplex series features a robust tooth profile with a 5mm tooth radius and 2.3mm tooth width, ensuring smooth engagement and reduced wear. Available in a wide range of sizes from 8 to 125 teeth, the sprockets offer versatile compatibility for various industrial applications. Key dimensions include a consistent hub diameter (D1) of 4-70mm and bore options (dm) ranging from 8mm to 70mm depending on the tooth count. Notably, for models with 80 teeth or more, the plate thickness increases to 4mm for enhanced durability. These sprockets are ideal for demanding mechanical drives requiring reliable performance and adherence to European manufacturing standards.
EP-5×2,5 мм еуропалық жұлдызшалар — 03B-1 сериясы
Precision-engineered to DIN 8187 & ISO/R 606 standards, the EP 03B-1 series of European Sprockets is engineered for demanding power transmission applications where dimensional accuracy and long service life are non-negotiable. With a 5 mm pitch and 2.5 mm internal chain width, these European Standard Sprockets cover tooth counts from Z=8 all the way up to Z=125, giving engineers exceptional flexibility for both compact mechanisms and high-load industrial drive systems.
Whether you are sourcing жұлдызшалар мен берілістер for agricultural machinery in Colombia — including high-quality European Sprocket solutions, industrial conveyors in Germany, or automated packaging lines across Europe, the 03B-1 format delivers the interchangeability and tolerance control that multinational supply chains depend on. Every European Sprocket tooth profile in this series is verified in line with DIN 8187, ensuring reliable chain engagement and predictable wear patterns over hundreds of thousands of operating cycles.
1. Technical Specification Parameters
The table below lists the full dimensional data for the 03B-1 Simplex European Sprockets series (5×2.5 mm pitch). Dimensions are in millimetres. Tooth profile geometry: Tooth radius r₃ = 5 mm | Radius width C = 0.6 mm | Tooth width B₁ = 2.3 mm. Note: From Z=80, hub plate width H increases to 4 mm.
| Z (тістер) | dₑ (mm) | dₚ (мм) | dₘ (mm) | D₁ (мм) | А (мм) |
|---|---|---|---|---|---|
| 8 | 15.2 | 13.06 | 7 | 4 | 10 |
| 9 | 16.8 | 14.62 | 8 | 5 | 10 |
| 10 | 18.3 | 16.18 | 9 | 5 | 10 |
| 11 | 19.9 | 17.75 | 11 | 6 | 10 |
| 12 | 21.5 | 19.32 | 12 | 6 | 10 |
| 13 | 23.0 | 20.89 | 14 | 6 | 10 |
| 14 | 24.6 | 22.47 | 15 | 6 | 10 |
| 15 | 26.2 | 24.04 | 16 | 8 | 10 |
| 16 | 27.8 | 25.63 | 18 | 8 | 13 |
| 17 | 29.4 | 27.20 | 18 | 8 | 13 |
| 18 | 30.9 | 28.79 | 18 | 8 | 13 |
| 19 | 32.5 | 30.38 | 18 | 8 | 13 |
| 20 | 34.1 | 31.96 | 18 | 8 | 13 |
| 21 | 35.7 | 33.54 | 20 | 8 | 13 |
| 22 | 37.3 | 35.13 | 20 | 8 | 13 |
| 23 | 38.9 | 36.72 | 20 | 8 | 13 |
| 24 | 40.5 | 38.30 | 20 | 8 | 13 |
| 25 | 42.0 | 39.89 | 20 | 8 | 13 |
| 26 | 43.6 | 41.48 | 25 | 8 | 15 |
| 27 | 45.2 | 43.07 | 25 | 8 | 15 |
| 28 | 46.8 | 44.65 | 25 | 8 | 15 |
| 29 | 48.4 | 46.25 | 25 | 8 | 15 |
| 30 | 50.0 | 47.83 | 25 | 8 | 15 |
| 31 | 51.6 | 49.42 | 30 | 8 | 15 |
| 32 | 53.2 | 51.01 | 30 | 8 | 15 |
| 33 | 54.8 | 52.60 | 30 | 8 | 15 |
| 34 | 56.3 | 54.19 | 30 | 8 | 15 |
| 35 | 57.9 | 55.78 | 30 | 8 | 15 |
| 36 | 59.5 | 57.37 | 30 | 8 | 15 |
| 37 | 61.1 | 58.96 | 30 | 8 | 15 |
| 38 | 62.7 | 60.54 | 30 | 8 | 15 |
| 39 | 64.3 | 62.13 | 30 | 8 | 15 |
| 40 | 65.9 | 63.73 | 30 | 8 | 15 |
| 41 | 67.5 | 65.30 | 40 | 8 | 18 |
| 42 | 69.1 | 66.91 | 40 | 8 | 18 |
| 43 | 70.6 | 68.49 | 40 | 8 | 18 |
| 44 | 72.2 | 70.09 | 40 | 8 | 18 |
| 45 | 73.8 | 71.68 | 40 | 8 | 18 |
| 46 | 75.4 | 73.27 | 40 | 8 | 18 |
| 47 | 77.0 | 74.86 | 40 | 8 | 18 |
| 48 | 78.6 | 76.45 | 40 | 8 | 18 |
| 49 | 80.2 | 78.03 | 40 | 8 | 18 |
| 50 | 81.8 | 79.63 | 40 | 8 | 18 |
| 51 | 83.4 | 81.22 | 40 | 8 | 18 |
| 52 | 85.0 | 82.81 | 40 | 8 | 18 |
| 53 | 86.6 | 84.40 | 40 | 8 | 18 |
| 54 | 88.1 | 85.97 | 40 | 8 | 18 |
| 55 | 89.7 | 87.58 | 40 | 8 | 18 |
| 56 | 91.3 | 89.17 | 40 | 8 | 18 |
| 57 | 92.9 | 90.76 | 40 | 8 | 18 |
| 58 | 94.5 | 92.35 | 50 | 8 | 20 |
| 59 | 96.1 | 93.94 | 50 | 8 | 20 |
| 60 | 97.7 | 95.53 | 50 | 8 | 20 |
| 62 | 100.9 | 98.72 | 50 | 8 | 20 |
| 64 | 104.1 | 101.9 | 50 | 8 | 20 |
| 65 | 105.6 | 103.49 | 50 | 8 | 20 |
| 66 | 107.2 | 105.08 | 50 | 8 | 20 |
| 68 | 110.4 | 108.26 | 50 | 8 | 20 |
| 70 | 113.6 | 111.44 | 50 | 8 | 20 |
| 72 | 116.8 | 114.63 | 50 | 8 | 20 |
| 75 | 121.6 | 119.40 | 50 | 8 | 20 |
| 76 | 123.1 | 120.99 | 50 | 8 | 20 |
| 78 | 126.3 | 124.17 | 70 | 8 | 30 |
| 80 | 129.5 | 127.35 | 70 | 8 | 30 |
| 85 | 137.5 | 135.31 | 70 | 8 | 30 |
| 90 | 145.4 | 143.27 | 70 | 8 | 30 |
| 95 | 153.4 | 151.22 | 70 | 8 | 30 |
| 100 | 161.3 | 159.18 | 70 | 8 | 30 |
| 110 | 177.2 | 175.09 | 70 | 8 | 30 |
| 114 | 183.6 | 181.45 | 70 | 8 | 30 |
| 120 | 193.2 | 191.01 | 70 | 8 | 30 |
| 125 | 201.1 | 198.96 | 70 | 8 | 30 |
| Chain Parameter | Value (mm) | Sprocket Parameter | Value (mm) |
|---|---|---|---|
| Pitch | 5 | Tooth radius r₃ | 5 |
| Internal width | 2.5 | Radius width C | 0.6 |
| Roller Ø | 3.2 | Tooth width B₁ | 2.3 |
Note: H = 4 mm — from Z=80, the hub plate width is increased for structural reinforcement at higher torque loads.
2. Five Key Product Advantages
The EP-5×2.5mm 03B-1 European Sprockets line is built around five core performance pillars that differentiate it from generic off-the-shelf alternatives available in the market today.
① DIN 8187 / ISO/R 606 Conformity
Every tooth profile is verified against the European DIN 8187 standard, guaranteeing dimensional compatibility with all 03B roller chains and ensuring drop-in interchangeability across compliant drive systems worldwide. This makes procurement straightforward for OEM engineers and maintenance teams alike.
② CNC-Machined Tooth Profile Precision
Tooth profiles are cut on modern CNC machining centers that hold tolerances matching DIN quality grade specifications. The result is a consistent tooth radius (r₃ = 5 mm) and controlled radius width C = 0.6 mm across every batch, minimising noise and vibration even at elevated speeds in industrial environments.
③ Wide Tooth Count Range (Z=8 to Z=125)
From miniature Z=8 European Sprocket units for compact bicycle chainring drives to large Z=125 units suited to heavy industrial conveyors and agricultural equipment, the full range eliminates the need for multiple suppliers, simplifying logistics and reducing lead times for both standard and custom engineered projects.
④ Premium Material Selection
Standard units are manufactured from C45 carbon steel with optional case-hardening treatments. For corrosive or food-grade environments, stainless steel sprockets & gears — fully dimensioned as European Sprocket variants — are available on request. A hardened bore and precision-ground hub ensure concentricity tolerances that exceed basic market expectations.
⑤ Stock Availability & Custom OEM Support
Popular tooth counts are held in stock for immediate shipment to European Sprocket customers in Europe, South America, and Southeast Asia. For OEM programs requiring non-standard hub diameters, keyway dimensions, or surface treatments, our engineering team provides fully customised European Sprocket and custom sprockets gears with full dimensional documentation.
3. How European Sprockets Work
A sprocket is a profiled wheel with teeth that mesh directly with the links of a roller chain. Unlike gears, which transfer motion through tooth-to-tooth contact with another gear, sprockets and chains form an interlocking system where chain rollers seat into the curved tooth pockets of each European Sprocket's circumference. The pitch — 5 mm for the 03B-1 European Sprockets series — is the critical dimension that must match the chain's pitch exactly, because any mismatch introduces impact loading, accelerated wear, and eventual drive failure.
When the drive shaft rotates the driving European Sprocket, each chain link engages a tooth sequentially. The chain wraps around the arc defined by the pitch diameter (dₚ), transmitting torque to the driven European Sprocket at the opposite end of the chain run. Tooth radius r₃ = 5 mm and the seating curve geometry defined by ISO/R 606 determine how smoothly rollers enter and leave engagement — a geometry that directly governs noise level, chain elongation rate, and overall system efficiency. The tooth width B₁ = 2.3 mm is carefully matched to the chain's inner width of 2.5 mm, providing just enough clearance for free articulation while preventing lateral slip. For larger European Sprocket sizes (from Z=80 onward), the hub plate width H increases to 4 mm, reinforcing structural integrity at the elevated torque loads that accompany larger-diameter drive systems.
4. Material & Construction
The material selection for roller chain sprockets across the 03B-1 European Sprocket range balances mechanical strength, machinability, and long-term durability across a wide range of operating environments. The standard production material is medium-carbon C45 steel, which offers a tensile strength in the range of 600–800 MPa in its normalised condition and responds predictably to induction or case-hardening treatments that elevate surface hardness to 50–60 HRC while preserving a tough, ductile core.
For applications exposed to moisture, mild chemicals, or food-processing wash-downs, stainless steel sprockets & gears — available across the full European Sprocket tooth count range — in 304 or 316L grade are an ideal choice. These grades resist pitting and general corrosion without sacrificing the dimensional accuracy achieved during CNC hobbing. Grey cast iron (GG25) versions are offered for low-speed, high-load applications where vibration damping is prioritised over weight reduction. All European Sprocket blanks are sourced from certified bar stock with full material traceability documentation, supporting the EEAT requirements of procurement teams operating within ISO 9001 quality management frameworks.
Standard grade; heat-treatable; ideal for high-cycle industrial drives
Corrosion-resistant; food-grade approved environments; marine & chemical sectors
Cost-effective for low-speed, high-torque, vibration-dampening applications
Lightweight, low-noise; suited to plastic sprockets and gears and compact European Sprocket configurations in light-duty automation
5. Қолдану сценарийлері
The broad tooth count range and strict DIN compliance of EP-5×2.5mm European Sprockets makes them suitable for a wide variety of end-use environments. Below are the primary sectors where 03B-1 European Sprocket units deliver consistent, measurable value — from light industrial automation in Colombia to heavy agricultural operations across European markets.
Ауыл шаруашылығы техникасы
Combines, forage balers, planting equipment, and irrigation drive systems consistently rely on 03B-1 roller chain sprockets — precision-made European Sprocket components — to transmit power from PTO shafts to working implements. The robust C45 steel construction withstands the shock loads and dust exposure inherent to field operations, while the standardised 5 mm pitch ensures availability of replacement parts at dealers throughout Europe and Latin America, including Colombia's growing agribusiness sector.
Industrial Conveyor Systems
Logistics sorting lines, food processing conveyors, and packaging systems frequently specify industrial sprockets and gears — particularly the 03B-1 European Sprocket format — for its predictable chain pitch engagement. The consistent tooth geometry across all tooth counts allows designers to vary ratio within a single drive train without changing the chain standard, keeping inventory complexity low and enabling fast line changeovers.
Bicycle & Light Drive Systems
The 03B-1 European Sprocket at the lighter end of the tooth count spectrum — Z=8 through Z=25 — is regularly specified for bike chainrings and small drive systems in e-bike retrofit kits, cargo bike rear cassettes, and pedal-assist motor stages. The compact outer diameter (15.2 mm at Z=8 up to 42.0 mm at Z=25) fits within tight frame clearances while delivering the torque capacity required for loaded urban cycling applications.
Printing & Textile Machinery
High-speed printing presses and textile looms depend on drive components that maintain timing accuracy over millions of cycles. The controlled tooth profile geometry of 03B-1 European Sprockets ensures consistent chain wrap angles and predictable tensioner loads, which is critical for registration accuracy in printing applications and pick timing in weaving machinery used throughout the manufacturing base in Europe and Colombia.
Automation & Robotics
Collaborative robot joint actuators, automated guided vehicle (AGV) drivetrains, and palletiser arms increasingly use compact жұлдызшалар мен берілістер — including the 03B European Sprocket format — because the 5 mm pitch chain delivers the torque density of larger chains at reduced weight and envelope dimensions. The precision bore tolerance available on custom OEM builds supports direct shaft mounting without additional adapters.
Mining & Construction Equipment
At the large-tooth-count end — Z=80 through Z=125 — the reinforced hub plate width (H = 4 mm) makes the 03B-1 industrial sprockets and gears within the European Sprocket family suitable for slow-speed, high-torque auxiliary drives on crushing equipment, underground conveyors, and concrete mixing plants. These units are typically produced from case-hardened C45 steel and supplied with surface treatment options including zinc phosphate or black oxide for improved corrosion performance.
6. Applicable Standards & Regional Regulations
When sourcing Еуропалық стандартты жұлдызшалар for cross-border industrial projects, compliance with both product standards and regional machinery directives is essential. The following regulatory context applies to users of 03B-1 European Sprocket components and associated chain drive hardware.
European Union — Machinery Directive 2006/42/EC
Power transmission components used in machinery placed on the EU market must conform to the Machinery Directive. European Sprockets conforming to DIN 8187 / ISO/R 606 are accepted as standard components and do not individually require CE marking, but the assembled machine must comply. Germany's DIN standards body (DIN e.V.) and the European Committee for Standardization (CEN) provide the normative reference framework.
Germany — DIN 8187 & DIN 8181
Sprockets Germany production is governed primarily by DIN 8187 for roller chain European Sprocket profiles and DIN 8181 for short-pitch precision chains. Any European Sprocket sold or used as a replacement kettenrad zahnrader component in German machinery must meet these dimensional and quality tolerances. Our 03B-1 series is fully documented to DIN 8187 and available with quality certificates on request.
Colombia — ICONTEC & Import Regulations
Colombia's national standards body ICONTEC adopts ISO standards for mechanical power transmission components. Importers of industrial chains and sprockets — including the 03B-1 European Sprocket range — into Colombia must comply with DIAN customs classifications (HS 8483.40 for sprockets and chain wheels) and provide certificate of origin documentation. ISO/R 606-compliant components such as this 03B-1 series are accepted without additional certification when accompanied by dimensional test reports.
UK — UKCA Marking (Post-Brexit)
Since January 2021, machinery placed on the UK market requires UKCA marking in place of CE. Power transmission components such as roller chain sprockets, including European Sprocket variants, that comply with the equivalent transposed British Standards (BS EN ISO 606) are accepted. Our documentation package includes dimensional conformity records compatible with both CE (EU) and UKCA (UK) audit requirements.
USA — ANSI/ASME B29.1
While the 03B-1 is a European standard format, our manufacturing capabilities extend to ANSI/ASME B29.1 compliant sprockets for US market projects alongside the core European Sprocket DIN range, providing a genuine one-stop source for global industrial procurement teams. The difference between sprockets and gears under US regulations is addressed in AGMA and ASME standards respectively.
RoHS & REACH (EU Environmental)
Surface treatments applied to steel sprockets and gears in the European Sprocket range — including zinc plating and phosphate coatings — must comply with EU RoHS Directive 2011/65/EU and REACH Regulation EC 1907/2006. Our production process uses RoHS-compliant plating chemistries and all hazardous substance declarations (SVHC) are available in the product compliance documentation upon request.
7. Compatible Products & System Solutions
A well-specified European Sprocket is only part of a complete drive system. To help customers build complete, reliable power transmission assemblies, we also supply the following complementary products — making us a genuine single-source supplier for жұлдызшалар мен берілістер, particularly European Sprocket components, and their matched drive components.
Roller Chain — Matched Pitch Drive Components
Every European Sprockets installation requires a correctly matched roller chain to operate within rated parameters. Our affiliated supply network provides ISO-compliant 03B-1 pitch roller chains in simplex, duplex, and triplex strand configurations. Purchasing matched sprockets and chains — with each European Sprocket selected from the verified 03B-1 range — eliminates tolerance stack-up risk and simplifies warranty documentation.
NMRV Worm Reducers — Speed Matching & Torque Control
For applications where the drive motor speed must be reduced before reaching the European Sprocket drive stage, NMRV worm gear reducers provide compact, self-locking speed reduction in ratios from 5:1 to 100:1. Pairing an NMRV reducer output shaft with a correctly selected 03B-1 European Sprockets drive provides a clean, efficient solution for conveyor head drives, agitator drives, and similar variable-speed industrial applications. This combination represents the kind of one-stop supply advantage that procurement teams operating across industrial sprockets and gears and European Sprocket categories value most.
8. About Us
Operating since 2010, we bring over a decade of focused manufacturing expertise to the global power transmission components market. Our production facility is purpose-built for precision industrial sprockets and gears, including the full European Sprocket range, equipped with modern CNC hobbing and machining centers that hold tooth profile tolerances to DIN quality grade levels throughout every production run. We do not outsource machining operations — every European Sprocket tooth is cut and inspected on our own controlled equipment, which gives us full accountability for dimensional quality on every shipment.
Our product catalog covers three major sprocket standards — European DIN/ISO, American ANSI/ASME, and Asian JIS — as well as a comprehensive range of spur gears, bevel gears, and racks conforming to DIN 782. This breadth means that when customers are specifying a complete drive train, they can source жұлдызшалар мен берілістер — from European Sprocket DIN series through to ANSI and JIS formats — from a single qualified supplier, dramatically reducing supplier management overhead. We maintain stock inventory of fast-moving tooth count sizes for same-week shipment globally, and our engineering team supports custom OEM projects requiring non-standard bore dimensions, keyways, or surface treatments — with full dimensional documentation for incoming inspection teams. Whether you need a new kettenrad zahnrader for a direct replacement kettenrad zahnrader application or a specially engineered component for a new machine design, our team is ready to quote accurately and deliver on schedule.
Each gear tooth profile accuracy is documented in line with DIN 3961 / ISO 1328 quality levels, and every European Sprocket tooth profile is verified per DIN 8187, ANSI B29.1, or JIS B 1801 as applicable. We serve customers directly across Europe — including Germany, Spain, Italy, Poland, and the Netherlands — as well as growing markets in Colombia, Mexico, Brazil, and Southeast Asia.
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