Technical Specifications — FBN100B / FBN120B Finished Bore Sprocket
| 范围 |
价值 |
笔记 |
| Model |
FBN100B / FBN120B |
Asian Standard FBK/FBN Series |
| 沥青 |
31.75 / 38.10 mm |
|
| Tooth Width (T) |
17.6 / 22.6 mm |
|
| Teeth Range |
Z=9–21 |
|
| Hub Style |
B Type (finished bore, pre-machined) |
|
| Bore Range |
To your specification |
Keyway standard; specify shaft dia. |
| 材料 |
C45碳钢 |
|
| 牙齿硬度 |
HRC 50–60 |
感应淬火 |
| Bore Tolerance |
H7 |
Standard fit; H6 on request |
| Keyway |
Standard 120° position |
DIN 6885 keys |
主要特点
⚡ Ready-to-Install
Pre-machined bore to H7 tolerance eliminates on-site boring — simply align, key, and run. Saves 1–3 hours of workshop time per sprocket replacement.
H7 Bore Precision
CNC-bored to H7 tolerance (ISO 286) with surface finish Ra 1.6 µm — ensuring a precision shaft fit that prevents fretting, micro-movement, and hub fatigue failure.
Standard Keyway Included
DIN 6885 keyway pre-cut at the 120° position; set-screw hole tapped and included. No additional machining required.
Fast Dispatch on Standard Sizes
Standard bore finishes are available from stock for immediate dispatch. Specify your bore diameter — most are produced within 3–5 days.
应用程序
Conveyor Maintenance
Quick sprocket replacement on conveyor drives without on-site boring capability
Agricultural Drives
End-of-season sprocket replacement on harvester and planter drives
Plant Maintenance
Rapid sprocket changeout in remote locations without machine shop access
Production Lines
Minimise production downtime with pre-machined finished bore replacement sprockets
用户评价
Shane D. ★★★★★ 澳大利亚
“Finished bore FBN100B / FBN120B sprockets let our maintenance crew swap sprockets without calling in the machinist — cut our maintenance window from 4 hours to 45 minutes.”
FBN100B / FBN120B Z=15 30mm bore · March 2025
Magnus L. ★★★★★ Sweden
“H7 bore tolerance was confirmed by our QA team using plug gauges — spot on. Shaft fit is perfect without any shimming.”
FBN100B / FBN120B Z=19 45mm bore · February 2025
Karen P. ★★★★☆ New Zealand
“Good product, arrived as specified. Would appreciate a broader standard bore size range stocked from inventory.”
FBN100B / FBN120B Z=12 28mm bore · January 2025
Tomás R. ★★★★★ Portugal
“For our maintenance team, pre-finished bore sprockets are invaluable. These are consistently bored to tolerance and deliver fast.”
FBN100B / FBN120B Z=18 35mm bore · April 2025
常问问题
► How do I specify a finished bore sprocket?
Specify: model number, tooth count (Z), shaft diameter, bore tolerance (H7 standard), keyway dimensions (or ‘no keyway’), and whether a set-screw is required.
► What is the minimum bore diameter available?
Minimum bore depends on tooth count — for small tooth counts, hub wall thickness limits the minimum. Contact us with your tooth count and required bore to confirm feasibility.
► Can you bore to a non-standard tolerance (e.g. H6 or j6)?
Yes. H6, H5, and special fit tolerances are available on request with 2–3 extra days for precision boring. Specify the required tolerance at order.
► Do you include the key with the sprocket?
A DIN 6885 key sized to fit the keyway is included with most finished bore sprockets. Please confirm at order if a key is required.
► Is there an additional cost for the finished bore machining?
Finished bore versions carry a modest machining surcharge over stock-bore prices. Contact us for a precise quote based on tooth count and bore diameter.
- Verify shaft is clean, within tolerance, and free of burrs before assembly.
- Slide sprocket onto shaft (H7/k6 slip or light press fit); align keyway and insert key.
- Tighten set-screw to the hub marking torque specification.
- Align with mating sprocket; install chain and adjust tension.
- Check bore for any fretting marks after first 100 hours — if fretting is present, check shaft diameter and fit tolerance.
✓ ISO 9001:2015✓ ANSI B29.1✓ ISO/DIN 8187✓ JIS B 1801✓ BS/DIN 标准✓ 英国标准
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