1 inch 15 tooth spline shaft

Spline Shaft Of Rotary Tiller: insider notes, real specs, and buying tips If you’re scanning the market for a spline shaft for sale , you’ve probably learned two things already: not all splines are created equal, and the field is crowded with lookalikes. I’ve visited a handful of factories over the years, including in Shijiazhuang, Hebei Province, China, where this particular Spline Shaft Of Rotary Tiller is made—and, to be honest, the difference often comes down to heat-treatment discipline and gauging. What’s trending in ag power transmission Farms are pushing higher torque through smaller drivetrains—compact tractors, tighter implements, more hours per season. That means splines with better case depth, tighter runout, and coatings that don’t rust after a damp week in the field. We’re seeing a shift toward ISO/DIN involute profiles (for interchangeability) and test benches that verify torsional fatigue, not just static strength. Surprisingly, simple things like consistent spline flank finish reduce fretting far more than most brochures admit. Specifications at a glance Below is a typical configuration for the manufacturer’s rotary tiller shaft; customization is common. Profile standard ISO 4156 (metric involute) or DIN 5480; ANSI B92.1 on request Material options 20CrMnTi (carburized) / 42CrMo4 (AISI 4140, quenched & tempered or nitrided) Heat treatment Case depth ≈0.8–1.2 mm, HRC 58–62; core 30–40 HRC; shot-peened Runout / straightness ≤0.03 mm TIR; ≤0.1 mm per 1000 mm (real-world use may vary) Surface finish Spline flanks Ra ≤0.8 μm; phosphate or black-oxide available Torque capacity ≈1,200–1,800 N·m for common tiller frames; verify with duty cycle Service life Around 1,500–3,000 hours with proper lubrication and alignment Certifications Factory ISO 9001; material mill certs; hardness and MPI reports per lot How it’s made, briefly Materials: forged 20CrMnTi or 42CrMo4 bars, UT-checked. Methods: turning → spline hobbing/broaching → stress relief → heat treatment (carburize or Q&T/nitride) → shot peen → finish grind. Testing: go/no-go spline gauges (ISO 4156), Rockwell hardness (ISO 6508-1), magnetic particle inspection, runout, and torsion bench sampling. Docs: PPAP-lite on request; traceability by heat number. Where it works Rotary tillers for seedbed prep, paddy fields, orchard inter-row cultivation, vegetable plots, even rental fleets where abuse is, I guess, part of the business. Many customers say the reduced backlash makes starts smoother, which saves PTO clutches. Customization options Lengths, keyways, module/DP, number of teeth, hub interfaces, coatings, and profile standards (DIN/ISO/ANSI). If you ask for nitrided 42CrMo4 for corrosive soils, they’ll quote it. Lead times are reasonable, but during harvest season, plan ahead if you spot a spline shaft for sale that matches your BOM—stocks move fast. Vendor landscape: quick comparison Vendor Quality System Lead Time Customization Warranty Price Zinan (Shijiazhuang) ISO 9001, lot test data 15–30 days High (profile + coatings) 12 months Mid Generic trading house Varies 20–45 days Medium 6–12 months Low–Mid Small job shop Informal 7–20 days High (small batches) Shop policy Mid–High Indicative; depends on spec, heat treatment, and order size. Mini case study A cooperative in Hebei swapped out two seasons-old shafts for the carburized 20CrMnTi variant. Downtime dropped—operators told me engagement “felt cleaner,” and wear on mating hubs was visibly lower after ~600 hours. Not a lab trial, but the maintenance logs backed it up. Bottom line If you spot a spline shaft for sale that lists real case depth, runout, and gauging per ISO/ANSI, you’re already ahead. This unit from Shijiazhuang is built for the gritty reality of tillage: dust, shock loads, and long days. Ask for the test sheet—and actually read it. Authoritative citations ISO 4156-1:2005 – Straight cylindrical involute splines. ANSI B92.1-1996 (R2001) – Involute splines and inspection. DIN 5480 – Involute splines based on reference diameters. ISO 6508-1:2016 – Rockwell hardness test. ISO 9001:2015 – Quality management systems. ASTM A29/A29M – Steel bars, carbon and alloy, general requirements.