Maedler North America

Part number (SKU) 12912500
Material Steel (1045)
Surface Blank
Number of strands 2
Hardened No
Hub One sided
DIN ISO No. 20 B-2
No. of teeth 25
Outer diameter [da] 268.4 [mm]
Pitch circle diameter [d] 253.33 [mm]
Hub diameter [ND] 140 [mm]
Bore [B] 25 [mm]
Total length [L] 80 [mm]
Weight 21.36 [kg]

CATALOG PRODUCT PAGE

CAD FILES (download)

If you need a rework or a custom-made-product please contact us directly with your inquiry.

The supplied 3D models, pictures and technical drawings are made with reasonable care.
Nevertheless liability is excluded for the accuracy and correctness of this data.

Weight 21.36 kg
Dimensions 268.4 × 268.4 × 80 cm
Material

Surface

Number of strands

Hardened

Hub

DIN ISO No.

No. of teeth

Outer diameter

Pitch circle diameter

Hub diameter

Bore

Total length

Weight

Questions and answers

When will this part ship?

The stock status is shown next to the price. In stock parts ship from Bradenton, Florida, the same business day for orders placed before 2:00 p.m. Eastern. Backorder parts usually ship within 1–2 weeks.

What does shipping cost?

Shipping is calculated at checkout based on weight and destination. We ship with UPS and FedEx, and heavy orders ship by LTL freight. You can also ship on your own UPS or FedEx account for a $10 handling fee.

Can this part be bored or keyed to fit my shaft?

For most gears, sprockets, pulleys and couplings, yes. We can bore to your size and tolerance, cut a DIN 6885 keyway and add set-screw threads. We also offer expedited rework services for many parts. Email us the exact size needed and we will quote it.

Is there a better price for larger quantities?

Yes. The quantity prices are listed above. For more than the largest listed quantity, or for a custom version, ask for a quote.

Where are the CAD model and the catalogue page?

Under the Description tab you will find the link to free 2D and 3D CAD models and the catalogue page as a PDF.

Do you have this part in another size, material or in inches?

Often, yes. Use the filters on the category page, or send us your requirements and we will find the closest part or quote a custom one.

Can I return this part?

Unused standard parts can be returned within 30 days with an RMA number from returns@maedlernorthamerica.com; a 15% restocking fee applies. Custom-made parts or belts/chains that were cut to size cannot be returned. See our Return Policy.

More answers on our FAQ page. Questions about this part? Email us or call 941.803.0160.

Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 25 teeth material steel PN: 12912500

Material: Steel C45, not hardened. Pre-bored.

General dimensions: B1 = 18,5 mm, B2 = 54,6 mm, c = 3,5 mm, r3 = 32 mm.
Other dimensions: See the table.

$315.29

Availability: 1 in stock (backorders ship within 1-2 weeks)

Quantity Discount (%) Price
1 - 4 — $315.29
5 - 9 4.86% $299.98
10 - 24 9.72% $284.65
25+ 14.57% $269.34
ProductPart number (SKU)MaterialSurfaceNumber of strandsHardenedHubDIN ISO No.No. of teethOuter diameter [da]Pitch circle diameter [d]Hub diameter [ND]Bore [B]Total length [L]WeightPrice
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 10 teeth material steel PN: 1291100012911000Steel (1045)Blank2NoOne sided20 B-210117 [mm]102.74 [mm]70 [mm]20 [mm]75 [mm]2.85 [kg] $70.01
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 11 teeth material steel PN: 1291110012911100Steel (1045)Blank2NoOne sided20 B-211127 [mm]112.68 [mm]80 [mm]20 [mm]80 [mm]3.72 [kg] $84.47
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 12 teeth material steel PN: 1291120012911200Steel (1045)Blank2NoOne sided20 B-212137 [mm]122.68 [mm]90 [mm]20 [mm]80 [mm]4.66 [kg] $98.40
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 13 teeth material steel PN: 1291130012911300Steel (1045)Blank2NoOne sided20 B-213147.5 [mm]132.65 [mm]100 [mm]20 [mm]80 [mm]5.70 [kg] $113.23
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 14 teeth material steel PN: 1291140012911400Steel (1045)Blank2NoOne sided20 B-214157.6 [mm]142.68 [mm]110 [mm]20 [mm]80 [mm]6.84 [kg] $128.25
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 15 teeth material steel PN: 1291150012911500Steel (1045)Blank2NoOne sided20 B-215167.7 [mm]152.72 [mm]120 [mm]20 [mm]80 [mm]8.08 [kg] $154.46
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 16 teeth material steel PN: 1291160012911600Steel (1045)Blank2NoOne sided20 B-216177.7 [mm]162.75 [mm]120 [mm]25 [mm]80 [mm]8.90 [kg] $158.00
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 17 teeth material steel PN: 1291170012911700Steel (1045)Blank2NoOne sided20 B-217187.7 [mm]172.78 [mm]120 [mm]25 [mm]80 [mm]9.92 [kg] $173.87
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 18 teeth material steel PN: 1291180012911800Steel (1045)Blank2NoOne sided20 B-218197.8 [mm]182.85 [mm]120 [mm]25 [mm]80 [mm]11.00 [kg] $190.45
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 19 teeth material steel PN: 1291190012911900Steel (1045)Blank2NoOne sided20 B-219207.9 [mm]192.91 [mm]120 [mm]25 [mm]80 [mm]12.16 [kg] $207.08
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 20 teeth material steel PN: 1291200012912000Steel (1045)Blank2NoOne sided20 B-220217.9 [mm]202.98 [mm]120 [mm]25 [mm]80 [mm]13.38 [kg] $223.44
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 21 teeth material steel PN: 1291210012912100––––––––––––– $313.32
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 25 teeth material steel PN: 1291250012912500Steel (1045)Blank2NoOne sided20 B-225268.4 [mm]253.33 [mm]140 [mm]25 [mm]80 [mm]21.36 [kg] $315.29
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 26 teeth material steel PN: 1291260012912600––––––––––––– $451.70
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 28 teeth material steel PN: 1291280012912800––––––––––––– $449.58
Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 30 teeth material steel PN: 1291300012913000Steel (1045)Blank2NoOne sided20 B-230318.7 [mm]303.75 [mm]150 [mm]25 [mm]80 [mm]30.69 [kg] $436.46

Double-strand sprocket ZRS with hub 20 B-2 1 1/4×3/4″ 25 teeth material steel PN: 12912500

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