Product Description GEAR # 174488 383273 Feed Dog Drive Shaft Set Singer 510 513 514 518 522 527 530 These are New Feed Dog Shaft Gears (Top & Bottom Gears) # 174488 & 383273. These are the gears that fit on the shaft that drives the feed dog and fit the following models. SINGER MODELS - 1021, 1022, 1030, 1036, 1221, 1425N, 1482, 1485, 1486, 1488, 1490, 1492, 2000, 2001, 2005, 2010, 2102, 2105, 2106, 2108, 2110, 2112, 2114, 2118, 2210, 2302, 2303, 2304, 2315, 2330, 2404, 2430, 2502, 2503, 2504, 2515, 2530, 2623, 2638, 2662, 2712, 2718, 2722, 2724, 2730, 2732, 290, 2950, 433, 437, 438, 500, 501, 502, 503, 507, 509, 510, 513, 514, 518, 522, 527, 530, 533, 534, 538, 543, 553B, 554B, 560, 6100, 6102, 6104, 6105, 6106, 6110, 6120, 6130, 6136, 6146, 6152, 6156, 6174, 6184, 7100, 7101, 7102, 7104, 7105, 7106, 7108, 7110, 7136, 714, 717 School, 7171, 7174, 719, 720, 724, 734, 737, 740, 750, 755, 756, 758, 760, 763, 764, 770, 771, 774, 775, 776, 778, 800, 8100, 813, 814, 830, 833, 834, 838, 844, 900 Futura, 900-3, 920-3, 925, 935U, 9410, 9606, 9618. PART NUMBER : 383273 & 174488 Alternative Part Numbers Include 174491, 177491, 422325 & 153487