expanding pivot pins · 5 min read
Made-to-drawing expanding pivot pins for heavy equipment, Ø30–500 mm and up to 4 m long, with sleeve, material, heat-treatment and RFQ guidance.
Published: · CNC Turkey
Quick action
Send your technical drawing — technical review and quotation within 2 business days.
Animation: a tapered ground pin with slotted sleeves expands into worn lug bores when the end bolts are tightened.
The assembly uses a ground tapered pin and slotted sleeves with a straight outside diameter and tapered bore. Tightening the end bolt and washer drives each sleeve up the taper so it expands into the worn lug bore. In many cases this can allow installation without line boring or welding, subject to review of bore measurements, load and joint geometry. Expansion range depends on sleeve design and is defined on the drawing; no universal value is promised.
Expanding pivot pins and conventional pivot pins can be made to the customer’s drawing in Ø30–500 mm diameters and lengths up to 4 m; turning capacity is Ø700 × 4000 mm. Options include 42CrMo4 and 34CrNiMo6, quenched and tempered or induction hardened, and 8620 or 20NiCrMo2-2 with case hardening. Optional hard chrome plating and grinding within our partner workshop network can be included in the manufacturing route. Final material, hardness, sleeve geometry, finish and dimensions follow the approved drawing.
Reference work: long pivot pins up to 4 m for underground mining loaders, produced to drawing.
The same general taper-and-expansion principle can also serve locating fixtures, assembly tools and interchangeable tooling. For these smaller pins, split sleeves and collet components, define the mating bore, contact length, cycle count, load direction and inspection dimensions in free and actuated conditions. Fixture components are not automatically equivalent to heavy-equipment pivot pins in function or load capacity.
FAQ
Yes. Ground tapered pins and slotted sleeves with a straight OD and tapered bore are made to the customer’s drawing.
Yes, subject to drawing review, pins can be made in Ø30–500 mm diameters and lengths up to 4 m. Turning capacity is Ø700 × 4000 mm; grinding is performed within our partner workshop network.
RFQ
Start with quantity, material, quality requirements and delivery country.
No account needed.
