SKU: 49748241569

Ronstan Series 40 All Purpose Block - Single Cheek

$78.46 $87.18
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 27 - Aug 1

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Description

Ronstan Series 40 All Purpose Block - Single CheekSeries 40 All Purpose Block Single Cheek Features: Exceptionally high working loads Low maintenance, long service life Self lubricating sheave All purpose (AP) blocks are a great all around solution. Self lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control

Series 40 All Purpose Block - Single Cheek

Features:

  • Exceptionally high working loads
  • Low maintenance, long service life
  • Self-lubricating sheave

All purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Can be mounted on masts and booms using the curved surface adapter. Can be stacked to create a double version, but no more than 60% of the rated working load should be applied to the upper sheave. Stackable with Ronstan Series 40 deck organizers.

Applications:

  • Mainsheet
  • Halyard
  • Vang
  • Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)

Materials:

  • U.V. stabilised Acetal sheaves
  • Impact and U.V. resistant, fiber reinforced Nylon cheeks
  • Grade 316 stainless steel bearing race
  • Alloy cheek plates

Manufacturer Part Numbers: RF41811
GRP:WRO
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 49748241569

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4.5 ★★★★★
Based on 13 reviews
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B
Verified Purchase
BoiseDick
Waukegan, US
★★★★★ 5
Great Little Scale
Model: K112BK
I think the size is perfect for my Turin Legato. Fits easily on the drip tray cover but able to get to touch keys easily. Like the touch features and glass top. It is thicker than advertised by a bit (0.78 in vs claimed 0.72).
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
S
Verified Purchase
s
Bozeman, US
★★★★★ 5
great budget digital scale
Model: K112BK
Works well and battery has held up between charges. Measures my coffee beans every morning
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 10, 2025
C
Verified Purchase
Convinced
Waukegan, US
★★★★★ 5
Accurate
Model: K112BK
Love it. A wonderful addition to my coffee station
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026
A
Verified Purchase
Alexander
San Leandro, US
★★★★★ 5
Slightly Inaccurate but Works Well
Pros: Works perfectly for what I need it for. I use an aeropress and it's super easy to weigh the coffee going in and then the water on top of that. Then start the timer for the brew time and you've got a beautiful cup of coffee! Very bright display, easy to read, and comes with a rubber pad which makes cleanup easy. Cons: Not super accurate, but it's fine for making coffee unless you want to be exact. Sometimes the tare doesn't hold perfectly. For example, put your coffee on the scale. Tare it. Take it off. Put it back on. It might read a tenth of a gram or so one way or the other. Never impacted my coffee routine...
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Reviewed in the United States on March 13, 2021
C
Verified Purchase
C
Whiting, US
★★★★★ 5
Been working well for over a year
Had this for over a year now and no real issues. The only issue I can think of is that if something is a bit too close to the scale, the scale can fluctuate a bit by a gram or so. Just make sure nothing is touching it, especially anything electronic. Beyond that, it's a no-nonsense scale that works great with actual tactile buttons. Its refresh rate can lag behind a tiny bit, but you get used to it by stopping your pours in anticipation. For example, I typically do 300mL pours in total, and I usually start slowing down/stopping at around 280g. Battery life is pretty good, but the battery life indicator doesn't do a good job of letting you know when you need to replace the batteries. So you may end up with it powering off mid-brew, but I've only had to replace the batteries once despite daily use over the past year or so. That being said, it's useful to also do stuff like the 4:6 method based on water level vs timer too. I'd also say it may not be extremely accurate as sometimes it fluctuates by .1 grams, but it is accurate enough for practical purposes. For reference, .1g is simply ~1 coffee bean, and unless you're an espresso perfectionist, 1 coffee bean isn't going to make any real difference. In summary: + Just the essentials if you only want the essentials + Tactile buttons + Display is pretty nice + Accurate enough for practical purposes + Battery life very good + Will work for at least a year, can't say any longer until I own it for longer + Great for the cost = WIll not refresh weight as quickly as say an acacia scale which costs at least four times as much, easy to compensate for - Battery life indicator isn't great, so it may power off mid-brew every half year or so - Sensitive to adjacent electronic devices, 1 or 2 inches is enough distance - Sensitive to adjacent objects, be mindful of anything that is touching the silicone, even if it's barely touching by a hair
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 7, 2025

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