Case IH SB521 Small Square Baler

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Key Features of the SB521
•Rugged and durable
•Provides years of dependable service
•Uses six tines to move crop smoothly
•65-in. ​(1,651-mm) pickup or 70-in. (1,778-mm) with flare​


Plenty of Sturdy Tines and an Adjustable Pickup Gauge Wheel

Crank out high-quality bales in all kinds of crops and crop conditions with the SB Series small square balers. They are all about productivity. With four models, these balers get the job done right with high-capacity features like wide pickups and heavy-duty, smooth rotary feeding systems.

Plenty of Sturdy, Closely Spaced, Curved Finger Tines

• Gently lift the crop while keeping leaves intact
• Rugged tine bars run on sealed ball bearings for long life and trouble-free operation

Standard Pickup Gauge Wheels Adjust to Five Positions

•  Guides the pickup through the contours of the field
•  Allows you to get every bit of the windrow

Raise Pickup for Transport

•  Select the manual latch or optional hydraulic pickup lift


Provides For A Uniform, Well-Shaped Bale

Huge 283-sq in (1,826-sq cm) feed opening allows SB balers to swallow large, uneven windrows. From here, the dependable Case IH feeding system takes over, providing a smooth flow of crop into the bale chamber for a uniform, well-shaped bale.

SB521 Feeding System

• Six feeder tines gently move the crop into the bale chamber, saving high-protein leaves
• Chain-driven system for durability and easy servicing

Easy Bale Density Control

All SB Series balers allow for easy bale density control by adjusting the tension applied to the bale chamber. For manual density control, tension springs are an economical choice.

•  Provides "set-it-and-forget-it" convenience
•  Ensures consistent bale weight and density


Case IH Small Balers Ties and Twists

Case IH small bales hold up to handling from the rack to the elevator and from the barn to the bunk.

Dependable Gear-driven Twine Knotters:

•  Hard-surface material at all wear points
•  Bill hooks are chrome plated for extra durability and reduced maintenance
•  SB541 is also available with a gear-driven wire twister

Large-Capacity Twine Storage Increases Field Time Between Refills:

•  SB521 — load four balls of twine
•  SB531 — load six balls of twine
•  SB541, SB541c and SB551 — load eight balls of twine
•  SB541 wire-tie version features four-coil wire storage

Simple Design and Easy Operation

Fill your wagon with bales as you make them with the optional Case IH BTX11 bale thrower, available with the SB521, SB531 and SB541.

•  Smooth, reliable hydraulic drive throws the bales
•  Handles bales up to 38 in (965 mm) long and up to 70 lbs (32 kg)
• Easy operation from your tractor seat
• Move the Case IH bale thrower to the left or right to fill the corners of the wagon
• Adjust the belt speed to load the front or the back of the wagon
• The simple design of the BTX11 allows for easy installation, adjustment and service


Make Case IH
Model SB521
Bale size  
Bale cross section, h x w, in (mm) 14 x 18 (356 x 457)
Bale length range, in (mm) 12 to 52 (305 to 1321)
Density control, standard Adj spring loaded tension rails
Density control, optional No option
Bale thrower compatible BTX11 available (80 lb bale)
Pickup position Offset to right side
Sweep width on flare, in (mm) 70 (1780)
Sweep width inside, in (mm) 65 (1650)
Width between outside tines, in (mm) 58 (1473)
Tine spacing, in (mm) 2.63 (67)
Number of tines 88
Number of tine bars 4
Windguard description 8 rods
Standard pickup lift Manual
Optional pickup lift Hydraulic
Pickup protection V-belt slippage & lost motion reel drive
Feeder Description Six tines on feeder bar
Feeder opening, sq in (sq cm) 283 (1826), right side entry
Plunger speed, strokes/min 79
Plunger stroke, in (mm) 30 (762)
Tying mechanism  
Tying mechanism type Knotter
Tying capacity (twine), balls 4
Tying capacity (wire), coils No wire
Main Drive  
Flywheel diameter, in (mm) 22 (559)
Flywheel weight, lbs (kg) 248 (112)
PTO Driveline Std three-joint, Category 4
PTO Speed, rpm 540
Main drive protection Shearbolt, overrunning & slip clutches
Standard tire, left 27 x 9.50 - 15, 6PR
Standard tire, right 25 x 7.50 - 15, 6PR
Max. height, in (mm) 58 (1473)
Width, in (mm) 108 (2743)
Length w/o bale chute, in (mm) 198 (5029)
Length w/bale chute, in (mm) 240 (6096)
Weight w/twine tie, lbs (kg) 3,085 (1399)
Weight w/wire tie, lbs (kg) No wire
Tractor Requirement  
Tractor PTO Power, hp (kW) 35 (26)
Sales Literature  
Literature number CIH7180801
Literature date 7/1/2008
Manual number 86624840
Manual date 10/1/2001
Entry Date  
Manufacturing status Current
First Entry Date 8/1/2008
Revision Date 2/1/2012


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