Image for Illustration purposes only. Actual product may vary

Boston Gear 30267393 872B-4.4K-M1 helical speed reducer with 4.4:1 ratio. This unit features a helical gear design for smooth, quiet operation and high efficiency in industrial power transmission applications. The cast iron housing provides durability and vibration dampening.

Name: Boston Gear 30267393 872B-4.4K-M1 helical speed reducer with 4.4:1 ratio. This unit features a helical gear design for smooth, quiet operation and hig
Brand: Boston Gear
Price: 2887.67 USD
Availability: InStock
Rating: 5.0 (4 reviews)

MODEL 872B-4.4K-M1

BRAND

Boston Gear

SKU

45640

WEIGHT

86.100 lb

UOM

each

Contact supplier for technical support on: 800-626-2120

$2,887.67 Each

Prices are subject to change

FREE SHIPPING ON ORDERS OVER $100

Select Quantity

GET A QUOTE

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.

Pre-Lubricated	Yes
Ratio	4.4:1
Max Input HP	21.2
Fan Cooled	No
Unit Of Measure Show	English
Output RPM @1750	400.0
Output Shaft Style	Solid Projecting
Product Family	800B In-Line
Exact Gear Ratio	4.41
Product Description	872 D/R RED, 4.4 Ratio, Base Mount
Rated Efficiency	96%
Base	Base Mounted
Max Output Torque Cap	3265
Input Frame Size	None
Input Style	Projecting Input Shaft
Reduction Stages	Double
Motor HP	10
Recommended Lubrication	Klubersynth UH1 6-460
Family Id	30, 077
AGMA Service Class	III
Output Shaft O.D./Bore Size	1.625

Catalog Product Section

Engineering Data

Full Catalog

Installation & Operation Manual

SKU: 32204

Excellent customer service

The couplings are just what they are supposed to be. But I wanted to comment on MRO. This was my first order with them and I was extremely surprised at how well the company is run. I will be doing more business with them in the future.

SKU: 36216

Worm

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

SKU: 34930

Quality coordinator

GOOD QUALITY AND SERVICE.

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.

When will I be charged for my order?

Do you provide credit terms?

Can I get a discounted price? I am a reseller / government entity.

What is the return/warranty policy?

Can it be shipped today?

Does “Usually ships in 24 hours” mean it’s in stock?

Read full FAQ

Recently Viewed

#2263413

Brook Crompton BC4M7.5V4D is an AC inverter vector duty motor rated 7.5 HP at 1800 RPM, on 230/460V three-phase 60 Hz power, IEC 132S frame, with cast iron construction and D Flange mounting. Designed for VFD operation across an extended speed range with Class F or H insulation. Manufactured by Brook Crompton, trusted in motor design since 1898.

Brand	Brook Crompton
Model	BC4M7.5V4D

$1,362.52 Each

Free Shipping orders over $100

#5714829

Allen-Bradley 20AD034A3AYNANC1 is a PowerFlex 70 AC drive rated for 34A continuous output, 240V 3-phase input, and 20HP motor control. This Bulletin 20A drive features V/Hz and sensorless vector control modes, an internal brake transistor, and an integrated EMC filter for industrial motor speed regulation. It is designed for demanding applications requiring precise control and reliable performance in automation systems.

Brand	Allen Bradley
Model	20AD034A3AYNANC1

$13,310.00 Each

#475345

Rexnord Omega EF00356 E10HSU heavy-duty high-speed universal elastomeric coupling element. Close-coupled design with 0.875" bores, 760 in-lb continuous torque, 4.13" OD, and standard urethane material.

Brand	Rexnord
Model	EF00356

Call for pricing

#474039

Rexnord Omega EB00241 ES5 spacer elastomeric coupling element. This ES5 element has a 0.875" bore on one side and a 1.875" bore on the other, with a continuous torque rating of 433 in-lb and a maximum bore of 1.125". The standard urethane (orange) construction provides flexibility and vibration dampening for industrial power transmission applications.

Brand	Rexnord
Model	EB00241

Call for pricing

#475244

Rexnord EF00255 E5HSU Omega Elastomeric Coupling Element is a heavy-duty high-speed universal (HSU) design for close-coupled applications. It features a standard urethane (orange) element with 433 in-lb continuous torque, 1.125" bore A, 1.25" bore B, and 3.3" element OD.

Brand	Rexnord
Model	EF00255

Call for pricing

#475125

Rexnord EF00136 Omega E4HSU heavy-duty high-speed universal (HSU) elastomeric coupling element. Close-coupled E4 size with 1 in bore, 233 in-lb continuous torque, 2.96 in OD. Standard urethane (orange) construction for shock absorption and misalignment accommodation.

Brand	Rexnord
Model	EF00136

Call for pricing

#5713859

Allen-Bradley 20AD040A3NYNADG1 is a Bulletin 20A PowerFlex 70 AC drive rated for 40A continuous output, 240V 3-phase input, and 20HP. This variable frequency drive features V/Hz control, an internal brake transistor, and an integrated EMC filter. It is designed for general-purpose motor control applications requiring reliable speed and torque regulation.

Brand	Allen Bradley
Model	20AD040A3NYNADG1

Call for pricing

#6579698

Consolidated Bearings 22215E-2RS SPHERICAL ROLLER BEARING TWO SEALS

Brand	Consolidated Bearings
Model	22215E-2RS

$355.38 Each

Free Shipping orders over $100

Reviews

SKU: 32204

Excellent customer service

SKU: 36216

Worm

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

SKU: 34930

Quality coordinator

GOOD QUALITY AND SERVICE.

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.

Boston Gear 30267393 872B-4.4K-M1 helical speed reducer with 4.4:1 ratio. This unit features a helical gear design for smooth, quiet operation and high efficiency in industrial power transmission applications. The cast iron housing provides durability and vibration dampening.

Return policy