SIZE REFERENCE / YZEFY SPROCKETS
16B sprockets
16B sprockets are selected for European transmission, conveyors, material handling and OEM machinery. The 16B designation identifies the ISO 606 B-series chain family, but it does not finish the sprocket specification. Confirm strand, teeth, bore, keyway, hub and available axial space before ordering. 16B identifies a larger B-series chain row. A complete RFQ should include shaft and hub data because the chain reference does not define the finished mounting.
A standard request can start with the chain marking and required tooth count. A custom or replacement request should include the applicable drawing, sample, measured sprocket or shaft information. The chain and the shaft interface need to be checked as one assembly.
Size reference
16B Sprockets
- SpecificationReference
- Chain referenceISO 606 16B
- SeriesB-series
Quick Specifications
| Specification | Reference |
|---|---|
| Chain reference | ISO 606 16B |
| Series | B-series |
| Pitch | 25.400 mm |
| Roller diameter | 15.880 mm |
| Inner width | 17.020 mm |
| Strand | Simplex, duplex or triplex, stated in the complete chain designation |
| Sprocket forms | Type A plate, Type B hub, Type C double hub and drawing-defined forms |
| Bore and hub | Pilot or finished bore, keyway, bushing or custom shaft interface |
Chain & Size Reference
These values identify the mating chain. They are not finished sprocket dimensions. Pitch diameter, outside diameter, tooth width, bore and hub dimensions depend on the tooth count, strand arrangement and machine drawing.
| Chain | Series | Pitch (mm) | Roller diameter (mm) | Inner width (mm) |
|---|---|---|---|---|
| 16B | B | 25.400 | 15.880 | 17.020 |
Simplex / Duplex / Triplex
A simplex sprocket carries one chain row. Duplex and triplex versions carry two or three rows and use different transverse spacing and total tooth width. Include the full strand suffix with 16B. The base designation alone is not enough for a multi-strand part.
Available Sprocket Configurations
- Type A plate sprockets for compact layouts or separate-hub assemblies.
- Type B sprockets with a hub on one side.
- Type C sprockets with hubs on both sides or a wider shaft interface.
- Idler, split, weld-on, bushing-mounted and other drawing-defined forms.
Do not assign a tooth count from the chain size alone. Confirm driver and driven teeth in the RFQ or drawing.
Materials
Carbon steel is used for many general industrial drives. Alloy steel can be considered for higher load, shock or wear requirements. Stainless steel suits corrosion, washdown and cleaning exposure. Cast iron, aluminum and engineering plastics may fit specific low-load or weight-sensitive designs. State the material grade, supply condition and certificate requirement in the RFQ.
Heat Treatment & Surface Treatment
Tooth hardening, induction hardening or carburizing may be specified when the drawing or application requires greater tooth wear resistance. Protective surface treatment can be considered for corrosion, storage or washdown conditions. Include hardness, case depth, treated area, surface finish and inspection method when those values are controlled by the purchase specification.
Custom 16B Sprockets
Send the ISO series, chain reference, number of teeth, strand, bore, keyway, hub dimensions and quantity. Add material, heat treatment, surface treatment, tolerances, marking and inspection requirements from the drawing. For sample-based work, include the chain marking, tooth count, pitch, roller diameter, inner width, face width and shaft measurements. Application speed, load, center distance and operating environment can resolve details that a worn sample cannot show.
Replacement Sprockets
A replacement 16B sprocket should be checked against the mating chain and shaft, not copied from worn tooth tips. Send the old chain marking, tooth count, bore, keyway, hub, face width, photos and any part number. If the failure involved chain elongation, poor alignment, inadequate lubrication or contamination, inspect the chain and mating sprocket before replacing one part.
Applications
16B sprocket requests commonly come from European transmission, conveyors, material handling and OEM machinery. The application helps define the review, but it does not choose the tooth count or shaft connection. Load, speed, chain line, environment and mounting space still belong in the specification.
Standard & Compatibility Notes
16B and 16A share a 25.400 mm pitch but differ in inner width and series geometry. Keep their records separate. The series suffix must stay in every RFQ and drawing. Compare pitch, roller diameter, inner width, strand spacing, tooth form and shaft interface before approving a substitute.
How to Select
- Confirm ISO 606, the B-series suffix and the complete 16B chain reference.
- State simplex, duplex or triplex and the complete strand suffix.
- Record driver and driven teeth, speed ratio, center distance and chain line.
- Check pitch, roller diameter, inner width and transverse spacing.
- Select Type A, Type B, Type C or another drawing-defined form.
- Specify bore, keyway, locking method, hub dimensions and axial clearance.
- Add material, treatment, finish, quantity, inspection and drawing revision.
- Send a sample or measured photo if any original dimension is uncertain.
FAQ
What is the 16B pitch?
The 16B reference row lists a 25.400 mm pitch.
What distinguishes 16B from 16A?
The series and chain dimensions differ. The table lists 17.020 mm inner width for 16B and 15.750 mm for 16A.
What should be measured for a 16B replacement?
Measure the shaft, keyway, hub, face width, chain line and the existing tooth count.
Can a 16B page cover ISO, DIN and BS requests?
Yes. Those parent pages can link to the same canonical 16B specification page.
Request a Quote for 16B Sprockets
Send the ISO series, chain reference, number of teeth, strand, bore, keyway, hub, quantity and application. For custom or replacement work, attach the drawing, sample photo, old sprocket dimensions or existing part number. This prevents a shared-pitch comparison from being treated as a complete fit confirmation.