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Ever Power · Precision Sprocket Solutions · United Kingdom
03B-1 Sprocket
5 × 2.5 mm Roller Chain Sprocket · DIN 8187 · ISO/R 606
SIMPLEX · Z 8 – Z 125 · For Chain Acc. to DIN 8187 / ISO/R 606
A compact, high-precision simplex chain sprocket engineered for 5 mm-pitch roller chains. Widely specified by UK engineers, OEM builders, and procurement teams across England, Scotland, and Wales — available from stock with custom-bore options on fast lead times.
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Fast delivery across the UK · Custom bore available
What Is the 03B-1 Sprocket?
The 03B-1 sprocket is a simplex roller chain sprocket built around a 5 mm pitch, designed to accept chains conforming to DIN 8187 and ISO/R 606. Its tooth count ranges from Z=8 all the way to Z=125, which gives design engineers and procurement teams in the UK an unusually broad selection within a single, standardised product family. At the lower end, the Z=8 unit carries a tip diameter of just 15.2 mm — compact enough for precision instruments and miniature automation equipment — while the Z=125 version extends to 201.1 mm, covering sustained-load conveyor and indexing drives where a larger gear ratio is operationally necessary. Crucially, that entire span is served by one chain specification, which removes the complexity of managing multiple chain sizes across a facility’s spare-parts inventory.
The tooth geometry is governed by three values held constant across the whole range: tooth radius r₃ of 5 mm, radius width C of 0.6 mm, and tooth width B₁ of 2.3 mm. Together these parameters determine exactly how the chain roller seats in the tooth profile during engagement. A precisely dimensioned seating surface reduces chordal-action impact, spreads load uniformly across both roller and tooth flank, and slows the rate of chain elongation — which translates directly into a longer maintenance interval and lower whole-life drive cost. For sprockets carrying a tooth count of Z=80 and above, the DIN standard calls for an increased plate width of H=4 mm to accommodate the greater tangential forces acting on the larger-diameter units. This is not an optional enhancement but a prescribed geometry change built into the standard itself, ensuring consistent load-handling performance throughout the range.
Across the United Kingdom, 03B-1 sprockets appear in a wide variety of applications: food-processing lines running continuous production shifts, pharmaceutical packaging units demanding consistent positional accuracy, conveyor systems for warehouse automation, small agricultural machinery where space is at a premium, and bespoke automated test rigs in engineering research facilities. The fact that the sprocket conforms simultaneously to DIN 8187 and ISO/R 606 means replacement sourcing is straightforward regardless of which chain manufacturer supplies the rest of the drivetrain — a point of real practical value for plant maintenance engineers managing tight downtime budgets in manufacturing environments across Birmingham, Leeds, Manchester, Bristol, and beyond.
Technical Specifications
SPROCKETS
| mm | |
|---|---|
| Tooth radius r₃ | 5 |
| Radius width C | 0.6 |
| Tooth width B₁ | 2.3 |
CHAIN
| mm | |
|---|---|
| Pitch | 5 |
| Internal width | 2.5 |
| Roller Φ | 3.2 |
H=4mm — From Z=80 the width of the plate is increased
Dimensional Data — SIMPLEX (All dimensions in mm)
| Z | de | dp | dm | D1 | A |
|---|---|---|---|---|---|
| 8 | 15.2 | 13.06 | 7 | 4 | 10 |
| 9 | 16.8 | 14.62 | 8 | 5 | 10 |
| 10 | 18.3 | 16.18 | 8 | 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 | 6 | 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 |
★ From Z=80, plate width is increased to H=4mm per DIN standard.
Why Engineers in the UK Specify the 03B-1 Sprocket
⚙️
Dual-Standard Compliance
Full conformance to both DIN 8187 and ISO/R 606 guarantees interoperability with chain components from any compliant manufacturer, protecting procurement flexibility and simplifying spares management across multi-machine facilities.
📐
Broad Tooth-Count Range
Z=8 to Z=125 within a single series means one chain specification covers miniature instrument drives through to large-diameter conveyor and indexing sprockets — reducing design complexity and spares stockholding simultaneously.
🔩
Precision Tooth Geometry
Controlled tooth radius (5 mm), radius width (0.6 mm), and tooth width (2.3 mm) deliver smooth roller seating, reduced impact at entry, and uniform load distribution — extending chain and sprocket service life in demanding UK production environments.
🏭
Custom Bore & Hub Options
Ever Power machines sprockets to customer-specified bore diameters, keyway dimensions, and set-screw positions. OEM and engineering customers across the UK regularly take advantage of this service to eliminate secondary machining operations on their production floor.
🚚
Reliable UK Supply Chain
Stocked units ship to addresses throughout England, Scotland, and Wales on fast lead times. Bulk and scheduled-delivery arrangements are available for MRO teams and procurement departments with ongoing sprocket requirements across multiple sites.
🔬
Quality Material Selection
Manufactured from high-grade carbon steel with case-hardened tooth surfaces as standard. Optional stainless steel grades are available for corrosion-sensitive environments such as food processing, marine, and pharmaceutical applications.
Material, Operating Principle & Application Scenarios
The 03B-1 sprocket is most commonly manufactured in C45 carbon steel, hardened and tempered to achieve a surface hardness that resists tooth wear even under sustained chain tension. For applications in wet, chemically aggressive, or hygienically sensitive environments — such as the food preparation and beverage sectors that form a substantial part of UK manufacturing — 304 and 316 stainless steel grades are available to order without premium tooling charges. The hub bore is finish-machined to H7 tolerance as standard, ensuring a clean interference fit on ground shafts without the need for additional reaming.
In operation, the sprocket transfers rotational motion to a roller chain by sequential tooth-and-roller engagement. The 5 mm pitch establishes the geometry of this engagement: as each tooth enters the chain strand, the roller seats in the tooth root guided by the r₃ radius profile, dwells through the arc of engagement, then exits cleanly as the chain wraps away from the sprocket. Properly tensioned and aligned, the action is near-silent and produces minimal vibration — qualities valued in packaging machinery, laboratory automation, and any drive where acoustic output is a design consideration.
Food & Beverage Processing
Stainless variants comply with food-zone requirements. Widely fitted to portioning lines, slicing conveyors, and filling machinery across UK production facilities.
Pharmaceutical Packaging
Precise indexing and low backlash make the 03B-1 well-suited to blister-pack lines, labelling stations, and inspection conveyor systems in GMP environments.
Agricultural Machinery
Compact pitch allows fitment into tight drive housings on seeders, spreaders, and harvesting attachments common to UK farm equipment. Robust enough for field-duty vibration loads.
Conveyor & Automation
Multi-strand conveyor systems in warehouse and distribution centres across the UK regularly use 03B-1 sprockets at transfer points, take-up stations, and drive heads.
Printing & Textile
Synchronised web tensioning and registration drives in UK printing presses and textile looms require the consistent pitch-circle accuracy that the 03B-1 reliably delivers.
Medical & Laboratory
Small tooth counts (Z=8 to Z=15) are fitted in diagnostic instrument transport systems, lab automation platforms, and sample-handling robots in UK research and healthcare facilities.
Customer Success Case Study
CASE STUDY · WEST MIDLANDS, UK · FOOD PROCESSING SECTOR
Midlands Conveyor Solutions Ltd — Small-Pitch Drive Upgrade for Pharmaceutical Packaging Lines
The challenge: Midlands Conveyor Solutions, a Birmingham-based integrator building compact conveyor systems for pharmaceutical and nutraceutical clients, needed a reliable source of 03B-1 sprockets machined to specific bore sizes and keyway profiles. Their previous supplier had extended lead times that were creating delays on client-site installations, and the standard bore options available off the shelf did not match the shaft diameters specified by the OEM drive units they were using.
The Ever Power solution: Ever Power supplied custom-bored 03B-1 sprockets in Z=18, Z=25, and Z=40 configurations, machined to exact bore and keyway dimensions provided in the customer’s drawings. Material was 304 stainless to meet the food-zone contact requirements of the pharmaceutical clients. Delivery was completed in ten working days across two separate call-off orders, against a previous supplier lead time of six to eight weeks.
The outcome: Twelve production-line conveyor assemblies were commissioned on schedule across three client sites. In eighteen months of monitored operation, zero sprocket-related failures were recorded. Midlands Conveyor Solutions subsequently placed a standing blanket order, with Ever Power providing scheduled monthly call-offs to support their ongoing project pipeline across the UK Midlands and North West.
What UK Customers Say
★★★★★
“We’ve been sourcing 03B-1 sprockets from Ever Power for two years now. The bore machining is consistently accurate and the dimensional compliance with DIN 8187 has never once caused an issue on our conveyor builds. Lead times are genuinely fast — something we struggled to find elsewhere.”
James H. — Engineering Manager
Conveyor Systems Integrator · Manchester, UK
★★★★★
“Procurement of precision sprockets used to mean long waits and minimum order quantities that were impractical for our project volumes. Ever Power changed that. We can now order the exact tooth count we need in stainless, bored to spec, without paying a fortune in tooling charges.”
Sarah T. — Technical Procurement Lead
Agricultural Equipment Manufacturer · East Yorkshire, UK
★★★★★
“I specified Ever Power 03B-1 sprockets on a pharmaceutical packaging line in the East Midlands where noise and dimensional repeatability were both critical. The drive runs without issue and the tooth geometry is exactly what the DIN standard describes. Confident enough to use them as our go-to spec.”
David M. — Technical Director
Bespoke Automation Specialist · Nottingham, UK
Ever Power Manufacturing & Custom Sprocket Services
Ever Power operates a modern, CNC-equipped manufacturing facility with over 18 years of focused experience in power transmission components. The sprocket production line runs precision turning, gear-hobbing, and tooth-profile grinding processes, all monitored under a documented quality management system. This gives UK customers genuine confidence that what leaves the factory matches the drawing — not just on a first-article inspection, but across every unit in a production batch.
The customisation capability at Ever Power extends well beyond simply boring a standard sprocket to size. The engineering team regularly handles requests for non-standard tooth profiles, extended hubs, integral flanges, split-clamping designs, and combined sprocket-and-coupling assemblies. Material selection is flexible: C45 steel, 42CrMo4 alloy steel, 304 or 316 stainless, cast iron, and engineering-grade nylon grades are all available depending on the operating environment and load requirements. Drawing review, DFM feedback, and first-article reports are provided as standard on custom orders — a level of engineering engagement that B2B customers ordering specialist sprockets for UK production lines consistently find valuable.
Ready to Discuss Your Custom Sprocket Requirement?
Send us your drawing, shaft size, or application details — our engineers will come back with a competitive quote.
Frequently Asked Questions
Where can I find a reliable UK supplier for 03B-1 sprockets at a competitive price for an industrial conveyor project?
Ever Power supplies 03B-1 sprockets to engineering firms and plant operators throughout the United Kingdom. Stock units are priced competitively with volume breaks available for larger orders, and custom-bored variants carry no tooling surcharge on standard bore-and-keyway configurations. Contact us via [email protected] for a written quotation including delivery to your UK site.
How do I choose the right tooth count for a 5 mm pitch chain drive running at high speed in a food processing plant?
For high-speed drives, a higher tooth count on the driving sprocket is generally preferable because it reduces the polygonal (chordal) effect, lowers chain entry impact, and extends service life. Most drive designers targeting speeds above 2 m/s in a food-processing application select at least Z=17 to Z=25 on the driver. The driven sprocket tooth count then follows from the required gear ratio. Our engineering team can review your speed, load, and centre-distance constraints to confirm the optimal pairing.
Can Ever Power supply custom-bored 03B-1 sprockets with a keyway to match my shaft diameter, and what is the typical lead time for this in the UK?
Yes — custom bore and keyway machining is a core part of Ever Power’s service. Send us your required bore diameter, keyway dimensions (width and depth), and preferred tolerance and we will machine the sprocket accordingly. Typical lead time on custom-bored 03B-1 units is 7–14 working days depending on tooth count and quantity, with express options available. Contact [email protected] to initiate a quote.
Why does the 03B-1 sprocket plate width increase from Z=80 onwards, and does this affect how I should specify the chain?
The DIN 8187 standard prescribes a plate width of H=4 mm for sprockets with 80 teeth and above because larger pitch-circle diameters generate proportionally higher tangential forces for a given chain tension. The increased plate width provides additional rigidity to resist deflection under these loads. Importantly, the chain specification does not change — you continue to use the same 5 mm pitch, 2.5 mm internal width roller chain throughout the range. Only the sprocket plate dimensions change.
What is the difference between a DIN 8187 sprocket and an ANSI standard sprocket, and which should I specify for machinery being built or maintained in the UK?
DIN 8187 (equivalent to ISO/R 606) defines the metric British-style roller chain system used throughout Europe, including the UK, with pitch sizes given in millimetres. ANSI standard sprockets follow the American National Standards Institute series with inch-based pitches (e.g. ANSI 25, 35, 41). The two are not interchangeable. For machinery designed, built, or maintained to European standards in the UK, DIN 8187 / ISO/R 606 is the correct specification, and the 03B-1 sprocket fits squarely within that framework.
Which UK industries most commonly use 03B-1 sprockets and what is the typical cost for a bulk order of, say, 100 to 500 pieces?
The 03B-1 is used most heavily in food and beverage processing, pharmaceutical packaging, agricultural machinery, warehouse conveyor systems, printing, and laboratory automation — all significant UK industrial sectors. Pricing for bulk quantities depends on tooth count, material grade, and bore specification, so it varies. For a written price on 100–500 pieces please email [email protected] with your required specification and we will respond promptly with a competitive quote.
When should I consider replacing 03B-1 sprockets on a production line in England, and what signs indicate the teeth are worn beyond safe use?
Replacement should be considered when the tooth profile shows visible hooking (the trailing tooth face is concave and sharp-edged), when the chain climbs noticeably on the sprocket instead of seating cleanly, or when measured chain elongation has reached 1.5–2% of the nominal pitch length. In practice, sprockets and chain should be inspected together and replaced as a matched set to prevent a worn chain from rapidly degrading new teeth. Ever Power recommends keeping at least one spare sprocket per size on-site for unplanned maintenance needs.
Ready to Order 03B-1 Sprockets for Your UK Project?
Stock units and custom-bored options available. Fast delivery to England, Scotland, and Wales. Expert technical support from experienced power transmission engineers.
Ever Power · Precision Sprocket & Gear Solutions · Supplied to the United Kingdom and worldwide
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