3205 vs 3210 Ball Screw: How to Choose?

3205 and 3210 both use 32 mm diameter

3205 usually means 32 mm diameter with 5 mm lead, while 3210 means 32 mm diameter with 10 mm lead. A 32 mm diameter screw is often used for higher load or longer travel, but selection still depends on speed, support span, and mounting method.

For long travel, check support span and critical speed first

A long ball screw should not be judged only by diameter. As support span increases, high-speed use must check critical speed, vibration, alignment, and end support structure. 3210 is faster, but high-speed stability must be confirmed.

Load, packing, and transport risk belong in the RFQ

A 32 mm screw is usually heavier and long-part packing risk is higher. State overall length, quantity, shipping method, and whether wooden case or hard tube support is needed to reduce bending, end damage, or nut stress.

3205/3210 RFQ checklist

Confirm 3205 or 3210, or provide speed and thrust target for supplier recommendation.
Provide overall length, thread length, support span, mounting direction, and working travel.
Describe load, target speed, environment, and whether this is repair replacement.
Confirm end machining, nut style, packing risk, shipping method, and quantity.

Typical buyer situations

This topic usually appears in distributor stocking, repair replacement, machine retrofit, automation projects, and drawing-based purchasing. If a buyer sends only one model number, the supplier cannot judge the real use, packing risk, or whether machining upgrades are needed.

Details to confirm before quotation

To reduce repeated questions, the RFQ should cover product specification, use case, and delivery expectations together. The following points can be copied into the RFQ form or email.

Purchase purpose: distributor stock, repair replacement, machine project, or sample testing.
Specification: diameter, lead, overall length, thread length, nut type, and quantity.
Machining: cut-to-length, end machining, and whether BK/BF, FK/FF, EK/EF, or other supports must be matched.
Delivery: target quantity, expected lead time, packing, labels, shipping method, and whether shipment photos are required.

Common mistakes

A common mistake is asking only for unit price without application, quantity, or packing details. Another is sending photos without dimensions. This turns quotation into guesswork and can create errors in end machining, nut matching, or long-part shipping.

Next step

If the specification is clear, submit an RFQ directly. If the model or accuracy grade is still uncertain, describe the machine use and old part details so the supplier can recommend a standard part, bar stock, cut-to-length, or end machining route.