Merrow 72-D3B-2 Butt Seam Machine
Designed with an extended cutting system and THREE FEED DOGS for superior fabric handling, the 72 Class machines have become a favorite for Knit goods and a variety of non-woven processes. The 72-D3B-2 Series sews an identical stitch to the 70-D3B-2 but improves dramatically the reliability of sewing difficult fabrics.

Technical Specification
Sewing Speed: 2250spm
Stitch Width: 16mm (5/8")
Stitch length: 4-12 stitches per inch
Needle type: 151 x 7 (60M)
Stitch type: 501
No of threads: One (LS variation has 2 threads)

The Merrow 72-D3B-2 industrial sewing machine is designed to sew a consistent and flat butted seam on knit fabric. Specifically suited for tubular knits, the 72-D3B-2 can also be configured to sew a wide range of textiles. Like all 72-Class Merrow machines, it incorporates an extended feed system and specially designed cutters that allow the consistent movement of sewn material across the cutting surface.

-The Feed System is more robust, using three feed dogs instead of two.
-The Cutting System is entirely different and much more flexible. the 72-D3B-2 Cuts fabric 2"     ahead of the 70-D3B-2
-The Pressure Foot is 90% Longer
-The Dust shield has been improved
-The Needle Plate is 60% larger and offers more room for fabric handling

Fabrics & Processes

The 72-D3B-2 is better than the 70-D3B-2 for sewing knits, it can be used in almost all operations where you would use the 70-D3B-2. These include continuous bleaching, mercerising, scouring, washing, drying, pad & steam dyeing, printing, steaming, shrinking (sanforizing), finishing, tubular processing, slitting & de-twisting, heat setting, napping & shearing, singeing, calendering etc. 
 

Machine Options / Variations

CNP (Chemically Nickel Plated - For Wet Sewing)
The Merrow 70-D3B-2 CNP industrial sewing machine is designed to sew in harsh environments. It produces the same flat butted seam that has made the 70-D3B-2 the industry standard for end-to-end seaming, but has been chemically nickel plated (CNP) to allow for sewing on wet fabric.

Chemically adhering the nickel to the machine offers the utmost protection from corrosion, and like all Merrow machines the 70-D3B-2 CNP is hand assembled with high quality steel parts, ensuring a perfect butted seam even after years of use.

Merrow uses a proprietary method of nickel plating that covers 100% of the sewing machine. The process doesn't chip and prevents oxidation. The parts for a Merrow nickel plated machine are all specially manufactured to accommodate the proprietary nickel coating applied. The 70-D3B-2 CNP is often used in wet environments such as dyeing and finishing plants. Specifically in the following operations; bleaching, dying, mercerising, washing and printing operations . It operates on a table or a railway, and is often paired with Merrow's air motor.

R (Rolled seam)
The rolled butted seam wraps the two ends of joined material to prevent the seam from separating. It is the most effective way to join low count material end-to-end.

P (High Pile - For Thick Fabrics)
High Pile fabrics require more clearance for the cutting system and a higher looper stroke. The Merrow 70-D3B-2 HP is designed to sew material up to 2" thick. Merrow has modified the cutting system, the feed system and introduced a new looper for the HP machine allowing it to sew between 1200RPM and 2250RPM on high pile material. The 70-D3B-2 HP has been tested on paint roller fabrics, air filtration fabrics, insulation and foam products.

LS (Locked Stitch - For A Stronger Seam)
The Merrow 70-D3B-2 LS industrial sewing machine creates a two-thread butted seam on woven and non-woven goods. The second thread acts as a 'locked-stitch' and is designed to lock the joining stitches in place. The LS model creates an effective end-end seam for operations that require added security or for fabrics that will undergo a napping process.

70-Y3B-2 (Stitch Multiplyer - For Stitch Condensing)
Activated by a lever on the front of the machine, the stitch count can be doubled while the operator is sewing and is effective for processing loose weaves to higher density fabrics. Wide seams of joined fabric are weak at the edges (the selvages) and the 70-Y3B-2 addresses this by doubling the stitch count on demand to add strength to seams, when and where it’s needed.

GAP (Provides A Spaced Seam Between The Joined Fabrics)
The Merrow 70-D3B-2 G industrial sewing machine produces a single-thread butted gap seam, specifically designed for the end to end seaming of woven and non-woven material. The machine sews a 5/8” stitch with a physical gap (approximately 1/32”-1/16” wide) between the ends of joined fabric. This stitch is effective for applications that require drainage or seam detection between pieces of fabric. The 70-D3B-2 G can also be used in the processing of thick fabric, where it allows a seam to lay flat under the tension.

• Guarantees that the seam will be flat on thicker or more rigid materials.
• Allows space for extra fluid (dye, bleaches) to drain
• Offers an optical sensor a measurement interval

RAIL (For Automated Butt Seaming)
Combining with an automatic track enables the machine to traverse automatically, de-skills the sewing operation and reduces manual handling during the sewing process. The Merrow rail sewing head will fit sewing railways such as those made by Montimac in Italy. Railway operations create straighter more consistent seams across wide fabrics.

Stand Options

• Wheeled Unit Stand
• Tall Wheeled Unit Stand
• Table Top
• Servo Motor
• Air Motor (for wet environments)
• Helmsman Table (for wet environments)
• Table Top (for wet environments)