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Boston 30267647 F842B-2.9K-B9-M1 CASE SIZE: 4 HELICAL STAGES: 2 RATIO: 2.9:1

MODEL F842B-2.9K-B9-M1





32.100 lb



Contact supplier for technical support on: 888-999-9860

$934.55 Each

Prices are subject to change


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Free Gift with this product

Typically Ships in: 1 day

Returnable: See conditions

Boston Gear 800 Series contains a focused selection of compact, heavy duty helical gear drives that offer long-life performance and simplified maintenance. A broad range of reduction ratios suit an even broader range of specifications, while a variety of input shaft configurations maximize flexibility. In addition, the number of products that complement this series of gear drives make it an ideal choice for today industrial distributor. The 800 Series provides a functional interchange for SEW Eurodrive and other European manufacturers’ helical gear drives,making it uniquely practical for replacement applications.

Max Input HP8.34
Fan CooledNo
Unit Of Measure ShowEnglish
Output RPM @1750605.0
Output Shaft StyleSolid Projecting
Product Family800B In-Line
Exact Gear Ratio2.814
Product DescriptionF842 D/R RED, 2.9 Ratio, Quill Input, Base Mount
Rated Efficiency98%
BaseBase Mounted
Max Output Torque Cap840
Input Frame SizeB9-210C/180TC
Input StyleQuill
Reduction StagesDouble
Motor HP5
Recommended LubricationKlubersynth UH1 6-460
Family Id30,078
AGMA Service ClassII
Output Shaft O.D./Bore Size1

SKU: 37408

New lead screw gear.

Used this gear on a new lead screw l made for my old 1919 LeBlond belt drive lathe. It worked great for my application.

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SKU: 34959

Needle gear

I'm very happy with my purchase. I found exactly what I was looking for and I received it in a couple days. I will recommend your company to others and I hope I can deal with you again. Thank you!

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SKU: 36216


Haven't used them yet, but they match the worm gear perfectly. They should serve the purpose for which I purchased them.

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SKU: 6132994

Speed reducer purchase

The purchase was easy it did take two purchase until we got the correct part I guess it was a fault on both parts as we were looking at the wrong part number, but overall the purchase was good part fit perfectly. Thanks for your support.

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When you get to checkout, you’ll be able to select a free gift! Depending on the cart value, you’ll be shown relevant gifts your order qualifies for.


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Return policy

Item must be unused.

Item must be in it's original package.

25% Restocking, shipping and handling fees may apply to any return with this manufacturer.

For more information please consult