विवरण
European Standard Series · EP05-1-ASA25
European Standard Sprockets
Precision-engineered to DIN 8187 / ISO/R 606 — built for industrial drives that demand accuracy, longevity, and cross-border interoperability.
1. Technical Specifications — EP05-1-ASA25
The following table presents 20 representative dimensional parameters extracted from the EP05-1-ASA25 european standard sprockets chart. All dimensions are in millimeters (mm) unless otherwise noted. Chain specification: Pitch 6.35 mm (1/4″), Internal Width 3.18 mm (1/8″), Roller Φ 3.30 mm — conforming to DIN 8187 / ISO/R 606, chain designation ASA25.
| Z | de | dp | dm | D1 (SIMPLEX) | A (SIMPLEX) |
|---|---|---|---|---|---|
| 8 | 19.4 | 16.58 | 10 | 6 | 12 |
| 9 | 21.4 | 18.56 | 11.5 | 6 | 12 |
| 10 | 23.3 | 20.55 | 13 | 6 | 12 |
| 11 | 25.3 | 22.54 | 15 | 8 | 13 |
| 12 | 27.3 | 24.53 | 17 | 8 | 13 |
| 13 | 29.3 | 26.53 | 17 | 8 | 13 |
| 14 | 31.3 | 28.53 | 17 | 8 | 13 |
| 15 | 33.3 | 30.53 | 20 | 8 | 13 |
| 16 | 35.3 | 32.55 | 22 | 8 | 14 |
| 17 | 37.3 | 34.55 | 22 | 8 | 14 |
| 18 | 39.4 | 36.56 | 25 | 8 | 14 |
| 19 | 41.4 | 38.58 | 25 | 8 | 14 |
| 20 | 43.4 | 40.58 | 25 | 8 | 14 |
| 21 | 45.4 | 42.60 | 30 | 8 | 14 |
| 22 | 47.4 | 44.62 | 30 | 8 | 14 |
| 23 | 49.4 | 46.63 | 30 | 8 | 14 |
| 24 | 51.4 | 48.64 | 30 | 8 | 14 |
| 25 | 53.5 | 50.66 | 30 | 8 | 14 |
| 26 | 55.5 | 52.67 | 30 | 8 | 14 |
| 27 | 57.5 | 54.69 | 30 | 8 | 16 |
| 28 | 59.5 | 56.71 | 30 | 8 | 16 |
| 29 | 61.5 | 58.73 | 30 | 8 | 16 |
| 30 | 63.6 | 60.75 | 30 | 8 | 16 |
| 31 | 65.6 | 62.76 | 30 | 8 | 16 |
| 32 | 67.6 | 64.78 | 30 | 8 | 16 |
| 33 | 69.6 | 66.80 | 30 | 8 | 16 |
| 34 | 71.6 | 68.82 | 30 | 8 | 16 |
| 35 | 73.6 | 70.84 | 30 | 8 | 16 |
| 36 | 75.6 | 72.85 | 30 | 8 | 16 |
| 37 | 77.7 | 74.87 | 30 | 8 | 16 |
| 38 | 79.7 | 76.89 | 30 | 8 | 16 |
| 39 | 81.7 | 78.91 | 30 | 8 | 16 |
| 40 | 83.7 | 80.93 | 30 | 8 | 16 |
| 41 | 85.7 | 82.95 | 40 | 10 | 18 |
| 42 | 87.8 | 84.97 | 40 | 10 | 18 |
| 43 | 89.8 | 86.98 | 40 | 10 | 18 |
| 44 | 91.8 | 89.01 | 40 | 10 | 18 |
| 45 | 93.8 | 91.03 | 40 | 10 | 18 |
| 46 | 95.8 | 93.05 | 40 | 10 | 18 |
| 47 | 97.9 | 95.07 | 40 | 10 | 18 |
| 48 | 99.9 | 97.09 | 40 | 10 | 18 |
| 49 | 101.9 | 99.10 | 40 | 10 | 18 |
| 50 | 103.9 | 101.13 | 40 | 10 | 18 |
| 51 | 105.9 | 103.14 | 40 | 10 | 18 |
| 52 | 108.0 | 105.16 | 40 | 10 | 18 |
| 53 | 110.0 | 107.18 | 40 | 10 | 18 |
| 54 | 112.0 | 109.18 | 40 | 10 | 18 |
| 55 | 114.0 | 111.23 | 40 | 10 | 18 |
| 56 | 116.0 | 113.25 | 40 | 10 | 18 |
| 57 | 118.1 | 115.27 | 40 | 10 | 18 |
| 58 | 120.1 | 117.29 | 50 | 10 | 20 |
| 59 | 122.1 | 119.31 | 50 | 10 | 20 |
| 60 | 124.1 | 121.32 | 50 | 10 | 20 |
| 62 | 128.2 | 125.37 | 50 | 10 | 20 |
| 64 | 132.2 | 129.41 | 50 | 10 | 20 |
| 65 | 134.2 | 131.43 | 50 | 10 | 20 |
| 66 | 136.2 | 133.45 | 50 | 10 | 20 |
| 68 | 140.3 | 137.49 | 50 | 10 | 20 |
| 70 | 144.3 | 141.53 | 50 | 10 | 20 |
| 72 | 148.4 | 145.58 | 50 | 10 | 20 |
| 75 | 154.4 | 151.63 | 50 | 10 | 20 |
| 76 | 156.5 | 153.66 | 50 | 10 | 20 |
| 78 | 160.5 | 157.70 | 70 | 10 | 30 |
| 80 | 164.5 | 161.74 | 70 | 10 | 30 |
| 85 | 174.6 | 171.85 | 70 | 10 | 30 |
| 90 | 184.7 | 181.95 | 70 | 10 | 30 |
| 95 | 194.8 | 192.05 | 70 | 10 | 30 |
| 100 | 204.9 | 202.15 | 70 | 10 | 30 |
| 110 | 225.1 | 222.37 | 70 | 10 | 30 |
| 114 | 233.2 | 230.45 | 70 | 10 | 30 |
| 120 | 245.4 | 242.58 | 70 | 10 | 30 |
| 125 | 255.5 | 252.68 | 70 | 10 | 30 |
| पैरामीटर | Value (mm) |
|---|---|
| SPROCKETS | |
| Tooth radius r₃ | 6.4 |
| Radius width C | 0.7 |
| Tooth width B₁ | 2.9 |
| CHAIN | |
| Pitch | 6.35 |
| Internal width | 3.18 |
| Roller Φ | 3.3 |
| H=4mm – From Z=62 the width of the plate is increased |
de = Tip Diameter | dp = Pitch Diameter | dm = Hub Diameter | D1 = Bore Diameter | A = Hub Length
Chain: ASA25 (1/4″×1/8″) | Tooth Radius r3: 6.35 mm | Tooth Width B1: 3.0 mm | Chamfer Width C: 0.64 mm | Standard: DIN 8187 / ISO/R 606
2. How European Standard Sprockets Operate
At the core of any chain-driven power transmission system is the relationship between the sprocket teeth and the chain rollers. In the EP05-1-ASA25, each tooth is profiled to the DIN 8187 tooth space geometry — a carefully defined curve that ensures the roller seats firmly in the tooth valley during engagement and releases cleanly during disengagement. The pitch diameter (dp) determines the effective circular path along which the chain rollers travel, and because dp is derived from the formula dp = P / sin(180°/Z), every tooth count in the european standard sprockets sizes range delivers a geometrically correct engagement angle for the 1/4″ pitch chain.
During operation, the drive sprocket (fixed to a motor shaft or gearbox output) pulls the chain, transferring torque to the driven sprocket on the load shaft. The uniformity of the tooth profile across all teeth — maintained by CNC gear-hobbing equipment — is what keeps vibration and chordal action to a minimum, allowing the system to run quietly and efficiently even at moderate speeds. The root diameter (df = de − d1) is dimensioned so that the chain roller never bottom-contacts the root, protecting both the chain and the sprocket from premature fatigue. Dimensional tolerances on root diameter follow h11, and tooth width tolerances follow h14, as specified in the DIN standard — values that define the clearances needed for reliable european standard sprockets operation across varying lubrication conditions.
From Z=8 through Z=125, the hub diameter (dm) and hub length (A) scale to match the mechanical loading on each size. Larger tooth counts carry heavier bore holes and wider hubs so that shaft deflection and bearing loads remain within acceptable limits. The result is a predictable, scalable system: engineers selecting sprockets for european sprockets for sale in Colombia can cross-reference the european standard sprockets chart and identify the exact tooth count and bore combination without ambiguity.
3. उत्पाद के पाँच प्रमुख लाभ
1 — Certified DIN 8187 / ISO/R 606 Conformance
Every dimension — tooth profile, pitch diameter, root diameter, and tooth width — is controlled to the tolerances specified in DIN 8187 and ISO/R 606. This means that an EP05-1-ASA25 sprocket integrates directly with any compliant ASA25 chain without shimming, filing, or adjustment. For industrial buyers in Colombia and across Latin America who import machinery from Germany, Spain, or Italy, this dimensional interoperability eliminates costly compatibility inspections and speeds up line commissioning.
2 — Broad Tooth-Count Range (Z = 8 to 125)
The best european sprockets serve both low-ratio and high-ratio drive configurations. With 8 to 125 teeth available in the EP05-1-ASA25 series, a single supplier relationship covers the entire european standard sprockets sizes spectrum your engineering team might need — from compact 19.4 mm OD units for instrument-scale conveyors to 255.5 mm OD assemblies for heavy-duty drives. This breadth is especially valuable for machine builders and maintenance teams who want to consolidate their approved-supplier lists without sacrificing flexibility.
3 — CNC-Machined Tooth Profiles for Consistent Accuracy
Tooth geometry is produced on CNC gear-hobbing machines rather than by conventional form-milling, which means pitch errors accumulate more slowly across the full tooth count. Radial runout between the bore and root diameter is held to 0.0008df + 0.08 mm (but never exceeding 0.76 mm), and axial runout to 0.0009df + 0.08 mm (capped at 1.14 mm) — values taken directly from the DIN standard. In practical terms, this translates to a quieter drive, reduced chain wear, and a measurably longer system service life compared with sprockets cut to looser tolerances.
4 — Surface Treatment Options for Demanding Environments
Standard EP05-1-ASA25 sprockets are available with zinc plating (thickness tolerance ≤ 0.003 mm, neutral salt-spray resistance ≥ 120 h), black oxide, or non-chrome Dacromet finish for applications where corrosion is a factor. Buyers operating food-processing lines or outdoor conveying systems in humid Colombian climates can specify the appropriate treatment at order time, avoiding field corrosion that shortens maintenance intervals. This flexibility is part of what makes these european standard sprockets an application-matched solution rather than a catalogue commodity.
5 — One-Stop Supply: Sprockets, Chains & Gearboxes
Sourcing a complete drive train from a single supplier reduces the risk of mismatched components, simplifies invoice management, and shortens the time between order placement and line start-up. Alongside the full-series european standard sprockets and chains catalog, matching roller chains and gearbox reducers are available from the same product family — ensuring that pitch, roller diameter, and chain width are always co-specified and that technical support covers the entire system rather than isolated components.
4. Material & Surface Treatment
The EP05-1-ASA25 european standard sprockets are manufactured predominantly from medium-carbon steel (equivalent to C45/S45C), which provides the balanced combination of machinability, surface hardenability, and core toughness that drive applications require. The steel billet is first rough-forged using air hammer or electric screw press to refine grain structure, then precision-turned on CNC lathes to achieve dimensional tolerances within grade 6. Gear hobbing follows on CNC hobbing machines with a tooth surface roughness Ra of no greater than 1.6 μm.
Heat treatment is applied via pit furnace or box-type furnace, reaching maximum surface hardness of HRC65 (±1) with a core hardness variation of ≤ HRC1. Quenching options include salt-bath quenching, vacuum quenching, and high-frequency surface quenching for selected tooth-count ranges — allowing heat treatment to be matched to the application’s load cycle and operating temperature. The result is a case-hardened tooth surface that resists pitting and abrasion, combined with a tough core that absorbs shock loads without fracture.
Surface finishing options available for the EP05-1-ASA25 include: zinc electroplating (Zn 120 h neutral salt-spray), non-chrome Dacromet (400-h salt spray), black oxide, phosphorization, and anodic oxidation for aluminium variants. All surface treatments are applied after final grinding, so bore diameter and tooth profile dimensions are not affected. For applications in the Colombian food, pharmaceutical, or coastal industrial sectors where corrosion resistance is a regulatory or operational priority, the appropriate treatment can be specified on the purchase order.
5. अनुप्रयोग परिदृश्य
The compact 1/4″ pitch of the ASA25 chain and the corresponding EP05-1-ASA25 sprockets makes this product family well-suited to drives where space is limited but reliable torque transfer is non-negotiable. Below are the principal sectors where these european standard sprockets find regular application.
Light Conveying & Packaging Lines
Bottling plants, carton-sealing machines, and label applicators in Colombia’s food and beverage sector frequently use ASA25 chain drives for indexing and product transfer. The small pitch allows designers to fit drive components into tight machine envelopes without sacrificing the smooth motion that prevents product spillage or misalignment. The EP05-1-ASA25 sprockets — with tooth counts from Z=14 to Z=30 — are the most requested range for this application segment.
Agricultural Machinery
Seeders, crop-spacing mechanisms, and small irrigation pump drives in Colombia’s Andean agricultural zones rely on DIN-standard chain drives to transfer power reliably under outdoor, dusty, and variable-load conditions. The EP05-1-ASA25 sprocket — paired with an appropriate ASA25 chain and periodic lubrication — delivers a robust, field-serviceable drive that local technicians can maintain using standard tools. Tooth counts from Z=12 to Z=25 are typical in these configurations.
Textile & Printing Machinery
High-precision indexing in loom drives and printing rollers demands low chordal action and tight pitch-circle runout — requirements that the CNC-hobbed EP05-1-ASA25 tooth profile satisfies. In Colombia’s Medellín textile district and Bogotá’s printing and publishing industry, european sprockets for sale that meet DIN 8187 tolerances are preferred over lower-grade alternatives because pattern repeat errors are directly traceable to sprocket pitch inaccuracy.
Small Gearbox Output Stages
When a gearbox reducer drives a secondary chain drive — a common topology in material-handling and pump systems — the output sprocket must be dimensionally compatible with both the gearbox shaft and the driven chain. The EP05-1-ASA25 range, with hub diameters (dm) from 10 mm to 70 mm and bore options to suit standard shaft diameters, fits directly onto gearbox output shafts without custom machining in most cases, reducing the cost and lead time of drive system integration.
Automated Assembly & Robotics
Collaborative robot workcells, pick-and-place units, and cam-driven assembly stations increasingly incorporate chain drives for axes requiring low backlash and high positional repeatability. The tight DIN tolerances on tooth width (h14) and root diameter (h11) in the EP05-1-ASA25 series mean that chain slack is predictable and adjustable — a requirement for closed-loop motion control systems where dead-band error must be minimized to maintain throughput and assembly quality.
6. Applicable Regulations & Standards
Industrial buyers should be aware of the regulatory and normative environment surrounding power transmission components, both in Colombia and in major export markets. The EP05-1-ASA25 European Standard Sprockets are designed to satisfy the technical requirements of the following frameworks:
कोलंबिया
The Reglamento Técnico de Instalaciones Eléctricas (RETIE) and the Reglamento Técnico de Iluminación y Alumbrado Público (RETILAP) address electrical safety in driven machinery broadly, but the primary mechanical safety framework is the Decreto 1072 de 2015 (Decreto Único Reglamentario del Sector Trabajo), which establishes occupational health and safety obligations including machine guarding requirements for chain drives. Additionally, NTC 5655 (Icontec’s harmonized standard for mechanical power transmission) references DIN and ISO dimensional standards — meaning equipment built to DIN 8187 is already aligned with Colombian technical expectations for industrial components imported under tariff positions 84.83 (transmission shafts and related parts).
यूरोपीय संघ
Within the EU, power transmission sprockets used in machinery are subject to the Machinery Directive 2006/42/EC (recast as Machinery Regulation (EU) 2023/1230, applicable from January 2027). This directive requires that machinery placed on the European market meets essential health and safety requirements, and it is the designer’s responsibility to select components — including european standard sprockets — whose dimensional standards (DIN 8187, EN/ISO 606) are referenced in harmonized standards. CE marking of the final machine implies that all incorporated drive components conform to relevant dimensional and material specifications. Additionally, the RoHS Directive 2011/65/EU restricts hazardous substances in certain electrical and electronic applications; while mechanical sprockets typically fall outside RoHS scope, surface treatments involving hexavalent chromium are restricted under REACH (EC 1907/2006), which is why non-chrome Dacromet is offered as a compliant alternative.
United States
OSHA standard 29 CFR 1910.219 mandates mechanical power transmission guarding for all exposed chain drives operating above specified speed thresholds. ANSI/ASME B29.1 covers roller chain nomenclature and dimensions for the American market; ASA25 is the ANSI designation for the 1/4″-pitch chain series, confirming the EP05-1-ASA25 sprocket’s cross-market compatibility. Buyers sourcing for U.S.-destined machinery should confirm applicable OSHA guarding requirements with their machinery integrator.
ISO International
ISO 606:2015 (identical in scope to DIN 8187) defines the tooth profile, dimensional tolerances, and chain pairing data for short-pitch precision roller and bush chains. Compliance with ISO 606 is a pre-condition for machinery builders who sell into multiple markets, since it is the reference standard recognized by certification bodies in Europe, Latin America, Southeast Asia, and the Middle East. The EP05-1-ASA25 is manufactured to this standard, giving it the broadest possible market acceptance among all product classifications in the european standard sprockets kit and single-sprocket categories.
7. About Us – European Standard Sprockets manufacturer
Our production facility is equipped with CNC gear hobbing machines, CNC lathes, vertical broaching presses, and surface treatment lines capable of handling zinc plating, Dacromet coating, and black-oxide finishing — all under one roof. This vertical integration is what lets us offer the full european standard sprockets sizes range, from Z=8 small-bore units to Z=125 large-diameter assemblies, with consistent lead times and no dependence on sub-tier machining suppliers.
Quality assurance is embedded at every production stage: incoming steel bar is checked by optical emission spectrometer, in-process dimensions are verified on imported CNC machining centers with concentricity tolerances within 0.05 mm, and finished sprockets undergo gear-rim runout inspection before dispatch. Our quality system is certified to ISO 9001:2015, and API authorization has been obtained for relevant product lines — documentation that engineering procurement teams in Colombia, Europe, and North America routinely request before approving a new supplier.
कार्यशाला
8. Related Products & System Compatibility
A sprocket alone does not make a drive system. The EP05-1-ASA25 is engineered to work as part of a complete, co-specified drive train. Below are the two product categories that pair directly with these european standard sprockets and chains to deliver a fully integrated, one-stop-sourced power transmission solution.
Roller Chain — ASA25 Compatible
Our roller जंजीर range includes standard and reinforced variants manufactured to DIN 8187 / ISO 606, with inner widths and roller diameters precisely matched to the EP05-1-ASA25 sprocket tooth profile. Sourcing chain and sprockets together eliminates the guesswork of cross-referencing third-party catalogue dimensions and ensures that the assembled drive meets the fatigue-life calculations your engineering team has validated.
Electric Vehicle & Industrial Gearbox Reducers
When the EP05-1-ASA25 sprocket is the output stage of a gearbox-driven system, selecting the gearbox and sprocket from the same product family guarantees shaft diameter compatibility, key-way standardization, and a single point of technical accountability. Our gearbox reducer range covers a broad output torque spectrum, and each model is documented with a dimensional drawing that maps directly to the sprocket hub bore and key-way dimensions in the EP05-1-ASA25 european standard sprockets kit.
अक्सर पूछे जाने वाले प्रश्नों
Below are questions we frequently receive from engineers and procurement specialists in Colombia, Latin America, and internationally who are evaluating european standard sprockets for new or replacement drive applications.
Q1. What are standard European sprocket sizes and how do I select the right tooth count for my drive ratio?
Q2. How do European Standard Sprockets differ from American Standard (ANSI) sprockets in terms of dimensions and interchangeability?
Q3. How do I calculate the correct centre distance between two European Standard Sprockets for a given chain length?
Q4. How do European Standard Sprockets operate together with a gearbox reducer to form a complete drive system for Colombian industrial equipment?
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