{"id":1097,"date":"2026-06-26T02:25:17","date_gmt":"2026-06-26T02:25:17","guid":{"rendered":"https:\/\/metalite.net\/?post_type=product&p=1097"},"modified":"2026-06-26T02:32:10","modified_gmt":"2026-06-26T02:32:10","slug":"pto-shaft-for-krone-round-balers","status":"publish","type":"product","link":"https:\/\/metalite.net\/uk\/product\/pto-shaft-for-krone-round-balers\/","title":{"rendered":"Heavy-Duty PTO Shaft for Krone Round Balers \u2014 Size 4 & Size 6"},"content":{"rendered":"
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Heavy-Duty PTO Shaft for Krone Round Balers \u2014 CV & Standard, Size 4\/6, Friction & Cutout Clutch<\/h2>\n

Product Title: PTO Shaft for Krone Round Balers | CAT3\/CAT4 Constant Velocity Driveline, 1000\u20131800 Nm Clutch Options<\/p>\n

\"PTO<\/p>\n

Compatibility with Krone Round Baler Models<\/h2>\n

This Krone baler driveline covers eight confirmed model families \u2014 KR100, KR125, KR130, KR155, KR160, KR1250, KR1260, KR1500, and KR1550<\/strong> \u2014 using Size 4 (CAT3) or Size 6 (CAT4) CV shafts with a standard 1.375\u20116 spline tractor connection. Both constant velocity (CV) and standard universal-joint configurations are stocked so operators can match the Krone baler driveline spec sheet exactly without adapters or shimming.<\/p>\n

Clutch type varies by model: KR100\u2011160 use FT34 friction clutch at 1,000 Nm; KR1500\/1800 step up to FT32 (1,000 Nm) or FT42 (1,450 Nm); and the 1500V \/ 1250MC variants require a K64\/2 cutout clutch rated at 1,050 or 1,500 Nm. Confirm your baler serial-number prefix before ordering to select the correct torque bracket.<\/p>\n

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\n\n\n\n\n\n\n\n\n\n
Krone Model<\/th>\nPTO Shaft Type & Size<\/th>\nClutch \/ Protection<\/th>\n<\/tr>\n<\/thead>\n
KR100 \/ 125 \/ 130 \/ 155 \/ 160<\/td>\nSize 4 Standard or CV \u00b7 1210 \u00b7 1.375\u20116<\/td>\nFT34 friction clutch \u00b7 1,000 Nm \u00b7 1.375\u20116<\/td>\n<\/tr>\n
KR1500 \/ KR1800<\/td>\nSize 4 or Size 6 CV \u00b7 1.375\u20116<\/td>\nFT32 @ 1,000 Nm or FT42 @ 1,450 Nm<\/td>\n<\/tr>\n
KR1500V \/ KR1250 MC<\/td>\n2380 or 2480 CV \u00b7 1.375\u20116<\/td>\nK64\/2 Cutout @ 1,050 or 1,500 Nm<\/td>\n<\/tr>\n
KR1250 \/ KR1550<\/td>\nSize 4 (CAT3) CV \u00b7 1.375\u20116<\/td>\nFT32 or FF1 friction clutch @ 1,000 Nm<\/td>\n<\/tr>\n
KR1250 \/ KR1500 (high-output)<\/td>\nSize 6 CV (CAT4) \u00b7 1.375\u20116<\/td>\nFT42 friction clutch @ 1,450 Nm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Engineering for Heavy-Duty Performance<\/h2>\n

Krone round balers are among the highest-throughput machines in the round-bale segment, with pickup widths up to 2.20 m and bale chambers generating continuous torque spikes each time a new crop slug enters the rotor. The PTO shaft must absorb and redistribute these pulses without fatigue cracking at the yoke weld zone \u2014 the most common failure point on lower-grade shafts.<\/p>\n

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\u25b6 Cold-Drawn Seamless Tube \u2014 Tighter OD Tolerance<\/p>\n

Drive tubes are cold-drawn to \u00b10.2 mm OD, producing a finer grain structure than hot-rolled alternatives. The result is measurably higher fatigue resistance at the tube-to-yoke interface \u2014 critical for the repetitive shock loading that occurs in Krone’s positive-locking bale-start sequence.<\/p>\n<\/div>\n

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\u25b6 Heat-Treated Alloy Steel Yokes (C45 \/ 42CrMo)<\/p>\n

Yokes are precision-forged from 42CrMo alloy steel and induction-hardened at the cross-bearing bore to 58\u201362 HRC surface hardness. This prevents bore deformation under the sustained 1,000\u20131,800 Nm torque range seen in heavy silage and Comprima-style variable-chamber configurations.<\/p>\n<\/div>\n

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\u25b6 Constant Velocity (CV) Joint \u2014 Zero Velocity Fluctuation<\/p>\n

The CV homokinetic joint maintains uniform output speed at operating angles up to 25\u00b0. On Krone balers where the tongue pivots during headland maneuvers, a non-CV shaft introduces cyclic vibration at 2\u00d7 shaft frequency \u2014 the CV design eliminates this and reduces baler gearbox bearing wear accordingly.<\/p>\n<\/div>\n

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\u25b6 Friction vs Cutout Clutch \u2014 Matched to Krone Input Spec<\/p>\n

Friction (FT-type) clutches dissipate overload energy through controlled slip, suitable for occasional jam events. Cutout (K64\/2) clutches disengage immediately at the set torque \u2014 Krone’s preferred protection strategy on the 1500V and 1250MC models where rotor blockages occur at higher frequency in tough crop conditions.<\/p>\n<\/div>\n

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\u25b6 240-Hour Salt-Spray Zinc Coating<\/p>\n

All steel components receive yellow zinc-chromate electroplating meeting 240 h salt-spray resistance per ISO 9227. The sliding section receives a PTFE-impregnated surface treatment that maintains consistent slip force below 80 N over the rated extension cycle, reducing operator effort during length adjustment.<\/p>\n<\/div>\n

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\u25b6 Quick-Release Easy-Lock Guard System<\/p>\n

The full-length co-rotating guard uses a patented easy-lock collar that detaches and reattaches without tools in under 45 seconds. CE and EN 12965 compliant, the guard stays stationary during shaft rotation via independent bearing-cup support at both ends, meeting EU machinery directive requirements for CE-marked export markets.<\/p>\n<\/div>\n<\/div>\n

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Technical Specifications & Key Components<\/h2>\n

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Constant Velocity PTO \u2014 Base Part Numbers<\/p>\n

\n\n\n\n\n\n\n
CV Type \/ Speed<\/th>\nTractor Spline<\/th>\nBase Part Number<\/th>\n<\/tr>\n<\/thead>\n
CAT3 \/ 540 rpm<\/td>\n1.375\u20116<\/td>\n71R4121UCW07000<\/td>\n<\/tr>\n
CAT4 \/ 540 rpm<\/td>\n1.375\u20116<\/td>\n71R6121UCW07000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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\"Constant<\/p>\n

FT Friction Clutch Options \u2014 1.375\u20116 Spline Input<\/p>\n

\n\n\n\n\n\n\n\n
Universal Size<\/th>\nTorque Limit<\/th>\nPart Number<\/th>\n<\/tr>\n<\/thead>\n
CAT3 \/ S4<\/td>\n1,000 Nm<\/td>\n6QE344901R<\/td>\n<\/tr>\n
CAT3 \/ S4<\/td>\n1,000 Nm<\/td>\n635E41203R<\/td>\n<\/tr>\n
CAT4 \/ S6<\/td>\n1,800 Nm<\/td>\n663H53403R<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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