{"id":12007,"date":"2026-03-24T07:47:19","date_gmt":"2026-03-24T07:47:19","guid":{"rendered":"https:\/\/pto-gearbox.xyz\/?post_type=product&p=12007"},"modified":"2026-03-24T07:47:27","modified_gmt":"2026-03-24T07:47:27","slug":"agricultural-sprayer-pto-gearbox-replacement-for-comer-d-7a-and-d-7b","status":"publish","type":"product","link":"https:\/\/pto-gearbox.xyz\/it\/prodotto\/agricultural-sprayer-pto-gearbox-replacement-for-comer-d-7a-and-d-7b\/","title":{"rendered":"Riduttore della presa di forza per irroratrici agricole | ricambio per Comer D-7A e D-7B"},"content":{"rendered":"

Sprayer PTO Gearbox Overview<\/h2>\n

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The D-7 series agricultural sprayer PTO gearbox<\/b> is a high-ratio speed increaser designed to convert the tractor’s 540 RPM PTO output into the 2,000-3,000+ RPM shaft speeds that centrifugal and diaphragm sprayer pumps require. Two riduttore della presa di forza<\/b> models cover the range: the D-7A provides a 5.82:1 increase ratio with 16.2 kW (approximately 22 HP) input capacity and 48 Nm output torque, while the D-7B offers a 4.36:1 ratio with a higher 21.3 kW (29 HP) input and 84 Nm output torque. Both share the same housing, mounting dimensions, and shaft specifications \u2014 the difference lies in the internal gear set of this riduttore della presa di forza<\/b>.\u00a0\u00a0\u00a0\"sprayer-pto-gearbox-d7-product-combo-1\"<\/p>\n

Questo Sostituzione del riduttore della presa di forza<\/b> is manufactured as a direct dimensional match for the Comer Industries D-7A and D-7B models. The input shaft accepts a standard 1 3\/8-inch, 6-spline (Z6) PTO coupling, and the output side features a 35 mm shaft. The compact aluminium and cast iron construction keeps the unit light enough for mounting directly on sprayer frames without added support brackets. Both riduttore della presa di forza<\/b> models ship dry.<\/p>\n

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Specifiche tecniche<\/h2>\n

Both models share the same housing and shaft dimensions but differ in gear ratio and power capacity. Select the model that matches your sprayer pump’s speed and torque requirements.<\/p>\n

D-7A Specifications<\/h3>\n

\"sprayer-pto-gearbox-d7-dimensions-d7a-1\"<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Parametro<\/th>\nD-7A Value<\/th>\n<\/tr>\n<\/thead>\n
Speed Ratio (i)<\/td>\n5.82 : 1<\/td>\n<\/tr>\n
velocit\u00e0 di ingresso<\/td>\n540 giri al minuto<\/td>\n<\/tr>\n
Potenza in ingresso<\/td>\n16.2 kW<\/td>\n<\/tr>\n
Coppia in uscita<\/td>\n48 Nm<\/td>\n<\/tr>\n
Albero di ingresso<\/td>\n1 3\/8″ Z6<\/td>\n<\/tr>\n
Albero di uscita<\/td>\n35 mm<\/td>\n<\/tr>\n
Output Speed (at 540 RPM in)<\/td>\n~3,143 RPM<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

D-7B Specifications<\/h3>\n

\"sprayer-pto-gearbox-d7-dimensions-d7b-1\"<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Parametro<\/th>\nD-7B Value<\/th>\n<\/tr>\n<\/thead>\n
Speed Ratio (i)<\/td>\n4.36 : 1<\/td>\n<\/tr>\n
velocit\u00e0 di ingresso<\/td>\n540 giri al minuto<\/td>\n<\/tr>\n
Potenza in ingresso<\/td>\n21.3 kW<\/td>\n<\/tr>\n
Coppia in uscita<\/td>\n84 Nm<\/td>\n<\/tr>\n
Albero di ingresso<\/td>\n1 3\/8″ Z6<\/td>\n<\/tr>\n
Albero di uscita<\/td>\n35 mm<\/td>\n<\/tr>\n
Output Speed (at 540 RPM in)<\/td>\n~2,354 RPM<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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How This Speed Increaser Gearbox Works<\/h2>\n

Unlike most riduttore per presa di forza agricola<\/b> units that operate near 1:1 through 1:3 ratios, the D-7 series is a true high-ratio speed increaser. The tractor PTO delivers 540 RPM to the gearbox input shaft. Inside, a multi-stage gear arrangement \u2014 using a combination of bevel and spur gears \u2014 steps up the rotational speed by a factor of 4.36 (D-7B) or 5.82 (D-7A). The output shaft then spins at approximately 2,354 RPM or 3,143 RPM respectively, which falls within the operating range of most PTO-driven centrifugal sprayer pumps.<\/p>\n

The trade-off with speed multiplication is torque reduction \u2014 the output torque is proportionally lower than the input torque. This is acceptable for sprayer pump applications because centrifugal pumps require high rotational speed but relatively low shaft torque. The D-7A, with its higher 5.82:1 ratio, outputs 48 Nm \u2014 suitable for smaller pumps on 600-1,000 litre sprayers. The D-7B, at 4.36:1, delivers 84 Nm \u2014 enough for larger pump models on 1,500-3,000 litre sprayer tanks used in commercial orchards and broadacre crop protection.<\/p>\n

\"sprayer-pto-gearbox-d7-application-1\"<\/p>\n

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Installation and Maintenance Tips<\/h2>\n

Before First Use<\/h3>\n