Description
Hangzhou Ever-Power Sprocket Co., Ltd.
Engineers upgrading an overloaded #40 SS drive face a straight choice: add a strand, or move up a pitch. Here is when moving to #50 is the right call — and how to verify it.
When an #40 Drive Is Pushed Too Hard
The warning signs of an overloaded #40 stainless chain drive are always the same: accelerating chain elongation (the chain stretches faster than expected because every pin-bushing interface is working at or above design stress), early tooth-tip wear visible on the driver sprocket, and chain-link fatigue cracking at the outer plate holes. Before replacing the same hardware on the same cycle, it is worth asking whether the drive was undersized from the start or whether the process has evolved — faster conveyor speeds, heavier product loads, longer duty cycles — and the drive has not kept up. Moving from #40 to the ANSI 50 pitch (15.875 mm / 5/8 inch) increases allowable chain tension by roughly 60% in a single change, while keeping the overall drive size more compact than the jump to #60 would require.
Side-by-Side: #40, #50, and #60 Stainless Drives
Understanding the trade-offs between adjacent chain sizes helps engineers make the right call without trial and error:
| Property | #40 SS | #50 SS ← You Are Here | #60 SS |
|---|---|---|---|
| Pitch | 12.7 mm | 15.875 mm | 19.05 mm |
| Typical Max Tension | ~14 kN | ~22 kN | ~32 kN |
| Drive Compactness | Compact | Medium | Larger |
| Best For | Light/medium duty | Medium/heavy duty | Heavy/severe duty |
Technical Specifications
| Parameter | Value |
|---|---|
| Chain No. | ANSI 50 |
| Pitch | 15.875 mm (5/8″) |
| Roller Diameter | 10.16 mm |
| Material | 304 SS / 316 SS |
| Tooth Range | 9T – 80T |
| Compliance | ANSI B29.1, ISO 9001:2015 |
Lubrication Strategy for SS #50 Drives in Washdown Environments
Stainless steel does not corrode, but the chain-sprocket contact interface still generates heat and wear without lubrication — corrosion resistance and wear resistance are separate properties. For food-grade applications, NSF H1-certified mineral oil via drip lubrication is the standard solution for enclosed drives. In open drives subject to frequent washdown, food-grade PTFE dry-film spray applied to the chain strand before each cleaning cycle is preferred — it tolerates washing without re-oiling during production. Avoid silicone-based lubricants on stainless chain drives: silicone does not provide adequate boundary lubrication at the pin-bushing interface and can cause premature chain elongation even at modest loads.
Companion Parts for a Complete #50 SS Drive
When upgrading from a #40 to a #50 stainless steel sprocket drive, the chain, master links, and tensioner must all be replaced at the same time. We supply the complete kit:
- ANSI 50 SS Roller Chain — 304 and 316 grades, per-foot or 10/25 ft lengths
- 50-2 Duplex Chain & Sprockets — for drives needing higher load capacity without pitch change
- SS Idler Sprockets — plain-bore for tensioning, bearing-mounted for heavy-duty idling
- NSF H1 Drip Oiler — food-grade chain lubrication system compatible with SS chain
- Taper-Lock Bush Sets — for sprocket changeout without shaft disassembly
Customer Reviews
“Upgraded a canning line from #40 to #50 SS after persistent chain fatigue. Ever-Power supplied matched sprocket sets and chain. Twelve months in — zero elongation, no unscheduled stops.”
“316 SS #50 sprockets for our tunnel washer drives. Annual replacement order — consistently tight tolerances, clean keyways. Delivery to UAE in 10 days from payment.”
“Solid product for seed-processing lines. Lead time of 10 days was acceptable. Would benefit from stocked common tooth counts for urgent breakdown situations.”
Upgrade Your Drive — Order #50 SS Sprockets Today
+86-571-88220653 | [email protected] | SHENHUA ROAD, HANGZHOU, CHINA
See our full large sprocket range or contact us via the contact page.
Reviews
There are no reviews yet.