JWM Screw Jack Selection – Complete Step-by-Step Example

Let's walk through a real selection example together.

The Requirement

Step 1: Find the Model by Load

Look at the JWM load table

For 5 tons, JWM050 is the starting point.

Step 2: Check the Speed

JWM050 has a screw lead of 8mm. At 1450 RPM input:

High speed (H, ratio 6:1):

Speed = 1450 ÷ 6 × 8 = 1,933 mm/min

Low speed (L, ratio 24:1):

Speed = 1450 ÷ 24 × 8 = 483 mm/min

Your requirement is 500 mm/min → choose Low speed (L) ✅

Step 3: Final Recommendation

JWM050-L (5-ton capacity, 24:1 ratio) – meets your load and speed requirements.

Still Not Sure?

[Contact our engineering team] – we'll select the right model for you, free of charge