INSTRUCTIONS FOR SETTING UP AND OPERATING MERROW CLASS 70 The Styles 70-D3B-2 and 70-Y3B-2 have a recommended speed of 2250 stitches per minute. Styles. 70 Class Maintenance · 70 Class Troubleshooting · 70 Class Parts Manual Click on the model numbers below to access specific parts for each model. 70-D3B-2 MERROW. 70-D3B-2 HP SPECIFICATIONS. 2250 rpm. OPERATING SPEED: 5/8” (16mm). STITCH WIDTH : 501. STITCH TYPE. 8SDT. STANDARD NEEDLE : NEEDLE RANGE:. Stitch Samples · Parts Book · Pre-Owned · Instructions & Downloads · User Group. 70-D3B-2 Parts Manual. 71-Class cams have specially-milled grooves to seam at 4000 rpm on knit fabric. Lightweight Knit. Medium-Weight Knit. 70-D3B-2. 71-1D-7.Merrow Type: 70-D3B High speed sewing machine / sewing machine The 70-D3B-2 BUTTED SEAM Sewing Machine from Merrow is the flagship butted seam machine for(2) Merrow: the worlds best sewing machines. you're viewing: the 70-D3B-2 parts book. 70-D3B-2 Parts Manual. Merrow Documentation. Threading Diagrams. 70-D3B-2. M. 71-CLASS. The needle plates of the 71-Class machines have significantly smaller stitch tongues to create a more effective narrow butted seam for Merrow Style 70-1D-2 is designed to run 4000 stitches per minute. While these machines may run well with little care, they will give better results with