Price match promise
Rapid Worldwide Delivery
Supporting US Manufacture
International Exports
Home / Thern Vertical Lead Block
Thern Vertical Lead Block
Thern Vertical Lead Block
Secure Payment Transaction Guarantee
Choose Rapid Shipping at Checkout
24/7 U.S. Based Customer Service Help
Quick Overview:
- Pulley block
- Used to change direction of rope
- For use with wire rope winches
- Select model from 1/4" to 1/2" rope size
- Two year warranty
- Meets ASME B30.26
- Powder coated finish
- Cable keepers on top and sides of sheave
Customers Also Bought
Thern Vertical Lead Blocks offer a secure and easy way to change the direction of a winch rope and are commonly used in applications where the winch is awkwardly positioned or a line needs to feed around/over/under an obstacle.
Offering rope capacities up to 1/2", the Thern lead block meets even heavy-duty lifting and pulling applications.
Stay confident when not under load- with many other pulley blocks the rope can easily slip out and cause an accident, with the Thern Lead Block the rope is kept in the pulley by 'Cable Keepers' on the top and sides of the sheave.
- Up to 7000 lbs Line Load
- Cable Keepers on Top and Sides of Sheave
- Five Sizes for Different Rope Diameters
- Sealed Needle Roller Bearing with Grease Fitting
- Durable Powder Coat Finish
- Design in Accordance with ASME B30.26
- Two Year Warranty
- VLB-G25 — for 1/4″ Rope
- VLB-G31 — for 5/16″ Rope
- VLB-G38 — for 3/8″ Rope
- VLB-G44 — for 7/16″ Rope
- VLB-G50 — for 1/2″ Rope
Specifications by Model
| MODEL NUMBER | SHEAVE OUTER DIAMETER (INCHES) | ROPE DIAMETER (INCHES) | TOTAL WORKING LOAD LIMIT. R (LBS) | LINE LOAD LIMIT. L (LBS) |
|---|---|---|---|---|
| VLB-G25 | 4 1/2 (114 mm) | 1/4 (6 mm) | 4000 (1814 kg) | 2000 (907 kg) |
| VLB-G31 | 6 (152 mm) | 5/16 (8 mm) | 6000 (2722 kg) | 3000 (1361 kg) |
| VLB-G38 | 7 (178 mm) | 3/8 (10 mm) | 9600 (4354 kg) | 4800 (2177 kg) |
| VLB-G44 | 8 (203 mm) | 7/16 (11 mm) | 11600 (5262 kg) | 5800 (2631 kg) |
| VLB-G50 | 9 (229 mm) | 1/2 (13 mm) | 14000 (6350 kg) | 7000 (3175 kg) |
Factor = Total Load/Line Load
| ANGLE (DEGREES) | FACTOR |
|---|---|
| 0 | 2.00 |
| 10 | 1.99 |
| 20 | 1.97 |
| 30 | 1.93 |
| 40 | 1.87 |
| 45 | 1.84 |
| 50 | 1.81 |
| 60 | 1.73 |
| 70 | 1.64 |
| 80 | 1.53 |
| 90 | 1.41 |
| 100 | 1.29 |
| 110 | 1.15 |
| 120 | 1.00 |
| 130 | 0.84 |
| 135 | 0.76 |
| 140 | 0.68 |
| 150 | 0.52 |
| 160 | 0.35 |
| 170 | 0.17 |
| 180 | 0.00 |
Mounting Fasteners
| VLB-G25 | 7/16 Inch Grade 5 min or M12 grade 8.8 min |
| VLB-G31 | 1/2 Inch Grade 5 min or M12 grade 8.8 min |
| VLB-G38 | 5/8 Inch Grade 5 min or M16 grade 8.8 min |
| VLB-G44 | 3/4 Inch Grade 5 min or M20 grade 8.8 min |
| VLB-G50 | 3/4 Inch Grade 5 min or M20 grade 8.8 min |
Frequently Asked Questions
see all faqsCan I order from outside of the US?
We do not charge sales tax on any of our products. We are based in Oregon, which is one of five US states that does not have a sales tax.
When will I get my goods?
We do not charge sales tax on any of our products. We are based in Oregon, which is one of five US states that does not have a sales tax.
Can I use a resale certificate?
We do not charge sales tax on any of our products. We are based in Oregon, which is one of five US states that does not have a sales tax.
Do I get a certificate with my item?
We do not charge sales tax on any of our products. We are based in Oregon, which is one of five US states that does not have a sales tax.
Can you price match or beat an existing quote?
We do not charge sales tax on any of our products. We are based in Oregon, which is one of five US states that does not have a sales tax.
Secure Payment Transaction Guarantee
Choose Rapid Shipping at Checkout
24/7 U.S. Based Customer Service Help
Quick Overview:
- Pulley block
- Used to change direction of rope
- For use with wire rope winches
- Select model from 1/4" to 1/2" rope size
- Two year warranty
- Meets ASME B30.26
- Powder coated finish
- Cable keepers on top and sides of sheave
