{"id":774,"date":"2026-09-18T01:46:19","date_gmt":"2026-09-18T01:46:19","guid":{"rendered":"https:\/\/drivelines.net\/product\/series-5-clamp-bolt-pto-yoke-1-3-8-21-spline-30-2x80-mm-cross\/"},"modified":"2026-09-18T01:46:19","modified_gmt":"2026-09-18T01:46:19","slug":"series-5-clamp-bolt-pto-yoke-1-3-8-21-spline-30-2x80-mm-cross","status":"publish","type":"product","link":"https:\/\/drivelines.net\/pl\/produkt\/series-5-clamp-bolt-pto-yoke-1-3-8-21-spline-30-2x80-mm-cross\/","title":{"rendered":"Series 5 Clamp Bolt PTO Yoke \u2014 1-3\/8″ 21 Spline (30.2\u00d780 mm Cross)"},"content":{"rendered":"
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<\/div>\n

Series 5<\/p><\/div>\n

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<\/div>\n

1-3\/8″ 21-Spline (European)<\/p><\/div>\n

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<\/div>\n

30.2\u00d780 mm Cross Kit<\/p><\/div>\n

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<\/div>\n

Interfering Clamp Bolt<\/p><\/div>\n

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<\/div>\n

High Vibration Rated<\/p><\/div>\n

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<\/div>\n

CE Certified<\/p><\/div>\n

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<\/div>\n

MOQ 1 pc — LGPD Ready<\/p><\/div>\n<\/div>\n

Series 5 Z21 Clamp Bolt PTO Yoke — Compatible Shaft Series<\/h2>\n
\n\n\n\n\n\n\n\n
Compatible Shaft<\/th>\nSeries Type<\/th>\nCross Kit<\/th>\nHP Range<\/th>\n<\/tr>\n<\/thead>\n
T5<\/td>\nT Series (Triangular)<\/td>\n30.2\u00d780 mm<\/td>\n35\u201355 hp<\/td>\n<\/tr>\n
L5<\/td>\nL Series (Lemon)<\/td>\n30.2\u00d780 mm<\/td>\n35\u201355 hp<\/td>\n<\/tr>\n
G5<\/td>\nG Series (Wide Angle CV)<\/td>\n30.2\u00d780 mm<\/td>\n35\u201355 hp<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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Series 5<\/div>\n
Shaft Series<\/div>\n<\/div>\n
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30.2\u00d780<\/div>\n
Cross Kit mm<\/div>\n<\/div>\n
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21-Spline<\/div>\n
1-3\/8″<\/div>\n<\/div>\n
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30 mm<\/div>\n
Cross Pin Ø<\/div>\n<\/div>\n<\/div>\n
Series: 5<\/span>Spline: 1-3\/8″ Z21 (21-spline)<\/span>Cross: 30.2\u00d780 mm<\/span>Pin Ø: 30 mm<\/span>Lock: Interfering Clamp Bolt<\/span>Material: 20CrMnTi forged steel<\/span>Finish: Phosphate coat<\/span>Bore: Induction hardened<\/span>Compatible: T5 \/ L5 \/ G5<\/span><\/div>\n

Overview<\/h2>\n
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⚙ Series 5 — Cross kit 30.2\u00d780 mm, Pin Ø 30 mm<\/div>\n
🔗 Compatible: T5 \/ L5 \/ G5 drive shafts<\/div>\n
▲ 1-3\/8″ Z21 bore (21-spline) — 1-3\/8″ 21-Spline (European)<\/div>\n
🔧 Interfering clamp bolt — tool-secured, vibration-resistant, no spring element<\/div>\n
⚔ 20CrMnTi forged steel — induction-hardened bearing seat and spline bore<\/div>\n
🌎 CE certified — LGPD compliant, ships to Brazil<\/div>\n<\/div>\n

Product Description<\/h2>\n

Series 5 Clamp Bolt Splined Yoke \u2014 1-3\/8″ 21-Spline (Z21) is the interfering clamp bolt version for European tractors with the 21-spline PTO stub interface. The 21-spline bore is identified by counting 21 ridges inside the bore \u2014 both Z6 and Z21 share the same outer diameter (1-3\/8″\/34.9 mm), so spline count is the definitive identification method.<\/p>\n

The 30.2\u00d780 mm cross-kit seat is identical to the Series 5 Z6 clamp bolt version \u2014 the cross kit is fully interchangeable between Z6 and Z21 at Series 5. The difference is only in the spline bore. For tractors with Z21 stubs (SAME, Lamborghini, some older Deutz-Fahr models), the Z21 bore is the only correct specification \u2014 using a Z6 bore on a Z21 stub produces incomplete spline engagement.<\/p>\n

Series 5 Z21 clamp bolt cross-references to the Italian AB5\/A5 designation in Bondioli & Pavesi catalogs, which is the standard reference when sourcing European OEM replacement parts. For stock orders and OEM supply, contact Ever-Power Drive Line<\/a>.<\/p>\n

Clamp Bolt Locking Mechanism — Installation Procedure<\/h2>\n
\"Series<\/p>\n

The interfering clamp bolt bites into the spline bore wall when tightened, creating a mechanically locked connection independent of any spring element.<\/p>\n<\/div>\n

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1<\/div>\n

Clean and Align<\/p>\n

Clean the spline bore and PTO stub. Align the yoke spline bore with the stub splines. Slide the yoke fully onto the stub until it is completely seated \u2014 no gap between yoke face and stub shoulder.<\/p>\n<\/div>\n

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2<\/div>\n

Insert and Hand-Tighten Bolt<\/p>\n

Insert the clamp bolt through the yoke clamp collar. Hand-tighten until the bolt contacts the spline bore wall. Do not use impact tools at this stage \u2014 the bolt must be guided in straight.<\/p>\n<\/div>\n

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3<\/div>\n

Torque to Specification<\/p>\n

Use a calibrated torque wrench. Tighten to 25–30 Nm for Series 1–5; 35–45 Nm for Series 6–8. Inspect and retorque at first 10 hours, then every 50 hours in high-vibration duty.<\/p>\n<\/div>\n<\/div>\n

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⚠ Clamp Bolt vs Quick Release — Choose the Right Locking Type<\/p>\n

Clamp bolt:<\/strong> Use when the yoke remains connected for the season — OEM factory-fit, high-vibration implements, applications where removal requires tools by design. Quick release:<\/strong> Use when daily connect\/disconnect is required. The cross-kit and dimensional specifications are identical between both variants at Series 5.<\/p>\n<\/div>\n

Dimensional Drawing — A \/ B \/ C \/ D Reference<\/h2>\n
\"Series<\/p>\n

A = Overall length  |  B = Cross pin diameter  |  C = Yoke width  |  D = Bore diameter. Refer to the compatibility table above for exact mm values.<\/p>\n<\/div>\n

\"Series<\/p>\n

End-face view of the 1-3\/8″ Z21 bore (21-spline). Count the splines to confirm specification before ordering.<\/p>\n<\/div>\n

Cross-Reference Part Numbers<\/h2>\n
\n\n\n\n\n\n\n\n\n
Brand \/ Standard<\/th>\nPart Number \/ Reference<\/th>\nNotes<\/th>\n<\/tr>\n<\/thead>\n
Weasler (North American)<\/td>\n103-0521<\/td>\nClamp bolt \/ interfering bolt, D suffix<\/td>\n<\/tr>\n
Sparex \/ Eurocardan (European)<\/td>\nS.7510<\/td>\nInterfering clamp bolt, Series 5 Z21<\/td>\n<\/tr>\n
Bondioli & Pavesi (Italian)<\/td>\n6.05.21<\/td>\nAB5\/A5 catalog reference<\/td>\n<\/tr>\n
Ever-Power Drive Line (This product)<\/td>\nEPG-YK-CB-5-Z21<\/td>\nEPG Series 5 CB Z21<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Spline Profile Reference<\/h2>\n
\"PTO<\/p>\n

Left: Z6 (6-spline, 540 rpm) — Centre: Z21 (21-spline, European) — Right: Z20 (20-spline, 1,000 rpm)<\/p>\n<\/div>\n

Key Features<\/h2>\n
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<\/div>\n
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Interfering Clamp Bolt Lock<\/p>\n

The bolt threads into the yoke clamp collar and bites into the spline bore wall when tightened, creating a mechanically interlocked connection. Unlike a spring-loaded push-pin, the clamp bolt connection does not depend on any spring element \u2014 there is no spring to fatigue, no collar to wear, and no retention pin to lose in field conditions.<\/p>\n<\/div>\n<\/div>\n

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<\/div>\n
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High Vibration Resistance<\/p>\n

The bolt-secured connection maintains its clamping force under sustained vibration loads that cycle a push-pin spring mechanism. Specified for rotary cutters, forage harvesters, and high-duty-cycle implements where vibration fatigue is a concern over 300+ hour operating seasons. Retorque inspection at 50-hour intervals ensures sustained clamping force.<\/p>\n<\/div>\n<\/div>\n

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<\/div>\n
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1-3\/8″ Z21 Spline Bore<\/p>\n

European 21-spline interface for SAME, Lamborghini, and specific Deutz-Fahr tractor models. Induction-hardened spline bore for long-term engagement durability.<\/p>\n<\/div>\n<\/div>\n

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<\/div>\n
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30.2\u00d780 mm Cross-Kit Seat<\/p>\n

Precision-machined cross-kit bearing cup bores hardened to accept 30 mm pin diameter needle-roller cross-kit cups. Cross kit (code 5.01) is shared with the Quick Release version at Series 5 \u2014 one part number covers both variants.<\/p>\n<\/div>\n<\/div>\n

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<\/div>\n
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20CrMnTi Forged Steel Body<\/p>\n

Drop-forged chromium-manganese-titanium alloy steel yoke body, normalised and induction-hardened at the bearing seat bores. Phosphate surface coating provides corrosion resistance in outdoor agricultural conditions. Clamp bolt collar is machined integral with the yoke body \u2014 no separate clamp ring to lose or misalign.<\/p>\n<\/div>\n<\/div>\n

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<\/div>\n
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CE Certified \u2014 LGPD Ready<\/p>\n

CE Declaration of Conformity and ISO 9001:2015 documentation included with every shipment. LGPD data handling compliance for Brazil import submissions. SGS third-party inspection available for contract orders.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

Typical Applications<\/h2>\n
\"Series<\/p>\n

Series 5 CB Z21 — permanent-mount tractor-end connection for 35\u201355 hp implements<\/p>\n<\/div>\n

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Round Baler \u2014 Implement End<\/p>\n

Series 5 clamp bolt is specified on round baler implement-end driveline connections where the shaft remains coupled throughout the baling season and daily disconnection is not required.<\/p>\n<\/div>\n

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Irrigation Pump \u2014 Permanent Drive<\/p>\n

Tractor-end clamp bolt yoke on seasonal irrigation pump drives where the shaft is coupled for the entire irrigation season. Clamp bolt resists axial withdrawal from pump vibration.<\/p>\n<\/div>\n

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OEM Disc Mower \u2014 Factory Fitment<\/p>\n

Factory-fitted implement-end yoke on disc mowers specifying permanent driveline assembly at Series 5 torque class.<\/p>\n<\/div>\n<\/div>\n

Installation Steps<\/h2>\n
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1<\/div>\n

Verify Series and Spline<\/p>\n

Confirm your PTO shaft is Series 5 (30.2\u00d780 mm cross kit) and your tractor PTO stub is Z21 (1-3\/8″ 21-spline). Count the splines to confirm.<\/p>\n<\/div>\n

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2<\/div>\n

Clean Stub and Bore<\/p>\n

Remove all rust, debris, and old lubricant from both the PTO stub and the yoke spline bore. Clean mating surfaces ensure maximum contact area and correct bolt seating.<\/p>\n<\/div>\n

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3<\/div>\n

Slide and Seat Yoke<\/p>\n

Align splines and push the yoke fully onto the stub until the yoke face contacts the stub shoulder. Full seating is essential before bolt tightening \u2014 a partially seated yoke will not lock correctly.<\/p>\n<\/div>\n

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4<\/div>\n

Torque the Clamp Bolt<\/p>\n

Insert the clamp bolt and tighten with a calibrated torque wrench to 25–30 Nm (Series 1–5) or 35–45 Nm (Series 6–8). Do not use impact tools. Verify bolt is fully threaded before torquing.<\/p>\n<\/div>\n

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5<\/div>\n

Anchor Shield and Inspect<\/p>\n

Connect the shaft safety shield chains to non-rotating points on tractor and implement. Inspect the bolt after the first 10 hours of operation and retorque to specification. Reinspect every 50 hours in high-vibration duty.<\/p>\n<\/div>\n<\/div>\n

Frequently Asked Questions<\/h2>\n
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When should I use Z21 clamp bolt instead of Z6?<\/div>\n
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  • —<\/span>Use Z21 when the tractor PTO stub has 21 splines (count the ridges inside the stub)<\/li>\n
  • —<\/span>Z21 stubs are found on SAME, Lamborghini, and some older Deutz-Fahr tractors<\/li>\n
  • —<\/span>Using Z6 on a Z21 stub (or vice versa) produces incomplete spline engagement \u2014 causing rapid wear<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
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    Is the cross kit the same for Z21 and Z6 at Series 5?<\/div>\n
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    • —<\/span>Yes \u2014 the 30.2\u00d780 mm cross kit (code 5.01) is identical for both Z6 and Z21<\/li>\n
    • —<\/span>One cross-kit part number covers Z6, Z21 clamp bolt, and quick release variants at this series<\/li>\n
    • —<\/span>Only the yoke body differs between Z6 and Z21<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
      \n
      When should I use clamp bolt instead of quick release?<\/div>\n
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        \n
      • —<\/span>Use clamp bolt for OEM factory-fit and seasonal-mount applications \u2014 it does not require daily disconnection<\/li>\n
      • —<\/span>Use quick release for frequent daily implement changes<\/li>\n
      • —<\/span>Clamp bolt eliminates push-pin spring fatigue in high-vibration and long-season applications<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
        \n
        What is the bolt tightening torque for Z21 clamp bolt?<\/div>\n
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          \n
        • —<\/span>Same as Z6 at Series 5: 25\u201330 Nm (series 1\u20135) or 35\u201345 Nm (series 6\u20138)<\/li>\n
        • —<\/span>The bore profile differs (21 vs 6 splines) but bolt torque specification is the same<\/li>\n
        • —<\/span>Inspect and retorque at 50-hour intervals in high-vibration duty<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
          \n
          What European catalog references apply to Z21 clamp bolt?<\/div>\n
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            \n
          • —<\/span>Italian series: AB5D \/ A5D (Bondioli & Pavesi D-suffix for Z21)<\/li>\n
          • —<\/span>Sparex references listed in the Cross-Reference table above<\/li>\n
          • —<\/span>Interfering Bolt = Clamp Bolt in North American terminology<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n

            Customer Reviews<\/h2>\n
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            \n
            \n

            Andr\u00e9 F.<\/p>\n

            Rio Grande do Sul, Brazil \u2014 European Implement Importer<\/p>\n<\/div>\n

            ★★★★★<\/span><\/div>\n

              \n
            • Series 5 Z21 clamp bolt confirmed correct for our SAME tractor fleet \u2014 no engagement issues<\/li>\n
            • CE documentation accepted for import compliance<\/li>\n
            • Cross kit interchangeable with Z6 \u2014 simplifies our spare parts inventory<\/li>\n<\/ul>\n<\/div>\n
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              Lucia M.<\/p>\n

              Montevideo, Uruguay \u2014 Tractor Parts Dealer<\/p>\n<\/div>\n

              ★★★★★<\/span><\/div>\n

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              • Series 5 Z21 CB stocked for European tractor service \u2014 consistent replacement for Italian OEM yokes<\/li>\n
              • AB series cross-reference matches exactly<\/li>\n
              • 9-day lead time from stock<\/li>\n<\/ul>\n<\/div>\n<\/div>\n

                Shipping and Order Information<\/h2>\n
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                \n

                MOQ<\/p>\n

                1 pc from stock
                50 pcs custom \/ OEM<\/p>\n<\/div>\n

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                Lead Time<\/p>\n

                7–10 days (stock)
                20–30 days (OEM)<\/p>\n<\/div>\n

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                Shipping<\/p>\n

                Sea \/ Air to Brazil
                South America<\/p>\n<\/div>\n

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                Trade Terms<\/p>\n

                FOB Ningbo
                CIF Santos available<\/p>\n<\/div>\n<\/div>\n

                Certyfikaty<\/h2>\n
                \n
                \"CE\"CE Certified<\/span><\/div>\n
                \"ISOISO 9001:2015<\/span><\/div>\n
                \"TS\/16949\"TS\/16949<\/span><\/div>\n
                \"SGS\"SGS Inspection<\/span><\/div>\n
                \n
                <\/div>\n

                LGPD Compliant<\/span><\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

                Series 5 Clamp Bolt PTO Yoke (Interfering Bolt) from Ever-Power Drive Line. 1-3\/8 inch 21-spline (Z21, European) — bolt-secured interfering clamp, no spring element, high vibration rated. Cross-kit seat: 30.2\u00d780 mm (5.01), Pin Ø 30 mm. Compatible with: T5, L5, G5. 20CrMnTi forged steel, induction-hardened bore, phosphate finish. CE certified, ISO 9001. MOQ 1 pc. Ships to Brazil.<\/p>","protected":false},"featured_media":694,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[1222],"product_tag":[1163,1150,1223,993,1224,1162,1180],"class_list":["post-774","product","type-product","status-publish","has-post-thumbnail","product_cat-clamp-bolt-splined-yoke","product_tag-30-2x80-mm-cross-kit-yoke","product_tag-agricultural-pto-yoke","product_tag-clamp-bolt-pto-yoke","product_tag-ever-power-drive-line","product_tag-interfering-bolt-yoke","product_tag-series-5-pto-yoke","product_tag-z21-pto-yoke","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/drivelines.net\/pl\/wp-json\/wp\/v2\/product\/774","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/drivelines.net\/pl\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/drivelines.net\/pl\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/drivelines.net\/pl\/wp-json\/wp\/v2\/comments?post=774"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/drivelines.net\/pl\/wp-json\/wp\/v2\/media\/694"}],"wp:attachment":[{"href":"https:\/\/drivelines.net\/pl\/wp-json\/wp\/v2\/media?parent=774"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/drivelines.net\/pl\/wp-json\/wp\/v2\/product_brand?post=774"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/drivelines.net\/pl\/wp-json\/wp\/v2\/product_cat?post=774"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/drivelines.net\/pl\/wp-json\/wp\/v2\/product_tag?post=774"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}